1

SUCO
Transmission Technology

Centrifugal Clutches and Brakes

Electromagnetic Clutches and Brakes

Customized Solutions2

Welcome to SUCO
What you'll see on the following pages:
SUCO
SUCO
SUCO – A transmission technology specialist active on the global stage

Page

3

SUCO – A success story

Page

4

SUCO – Tradition and innovation

Page

6

PRESSOSTATSCLUTCHESMÉCANIQUESCENTRIFUGALAND BRAKESTechnical explanations

Page

10

F-Type – Self-increasing clutch

Page

16

S-Type – Pin-guided clutch with three ﬂyweights

Page

18

W-Type – Pin-guided clutch with two ﬂyweights

Page

20

P-Type – Asymmetric pivot clutch

Page

22

Key to model codes

Page

23

ELECTROMAGNETIC CLUTCHES AND BRAKES
TRANSMETTEURS DE PRESSION SUCO

From Page 24

Technical explanations

Page

E-Type – Electromagnetic clutch without bearing

Page

28

G-Type – Electromagnetic clutch with bearing

Page

29

B-Type – Electromagnetic brake

Page

30

Key to model codes

Page

31

Diﬀerent solutions, driven-side

Page

32

CUSTOMIZED SOLUTIONS

From Page 34

TRANSMETTEURS DE PRESSION SUCO
Examples of diﬀerent solutions
SUCO worldwide – our international sales network

Product Catalogue Transmission Technology
3. Edition, March 2019,
Article-number: 1-0-00-999-119

From Page 8© Copyright on contents and design.
Reproduction only with prior permission of the publisher.

26

Page

37

Page

40

1

2

SUCO Robert Scheuffele GmbH & Co. KG
A transmission technology specialist setting standards on the global stage

SUCO Robert Scheuffele GmbH & Co. KG
was founded in 1938 and has establisheditself across the globe under the tradename SUCO.
The two main product groups, pressure
monitoring (mechanical pressure switches,
vacuum switches, electronic pressure
switches and pressure transmitters) andtransmission technology (centrifugal
clutches and brakes, electromagnetic
clutches and brakes), are developed,
designed and manufactured at the Bietigheim-Bissingen site, approximately 20 km
north of Stuttgart in Germany.
Peter Stabel, Director

Marcell Kempf, Director

This worldwide acknowledged productquality is guaranteed with CNC-controlledmachining centres, automated assembly
machines, sophisticated test systems andthe latest in measuring equipment. Outstanding products, high level of customer
service and excellent price/performance ratio guarantee SUCO's good market positioning within the product sectors mentioned.

This catalogue does not only give a clear
and structured overview of our capabilities
all around our comprehensive range oftransmission technology products but alsooffers detailed technical explanations supporting you in many challenges occurringin your specific applications.

Highest quality in all areas
The development and continual expansionof the company premises are indications ofa thriving company.
Work on global presence has been rigorous,
and today SUCO is actively represented by
distribution companies in France (SUCO VSE
France – a 50/50 joint venture with VSE
Volumentechnik GmbH) and in the USA(SUCO Technologies Inc.), by associatecompany ESI Technology Ltd in Wrexham,
North Wales, and by more than 60 mostly
exclusive sales partners in over 50 countries.
Certified to DIN EN ISO 9001:2015, SUCO
has retained its consistently high quality
standards for many years, something substantiated by numerous audits by reputable companies from a broad diversity ofindustry sectors.

Please trust in a company with 80
years of experience.

A sophisticated level of personnel qualification, a high identifaction of the employeeswith the company, process-oriented structures and efficient organisation are guarantees for continued company growth into
the future.
Observance of ethical principles and comprehensive environmental awareness isstandard at SUCO, and guarantees highclass business relationships on the highest
level for our customers all over the world.
3

4

5

SUCO – A success story
From a mechanical workshop to an industrial company operating on the global stage

1938

1946

Robert Scheuffele starts up
a mechanic's workshop

1956

Registration of trade name SUCO
with worldwide trademark protection

Production start of centrifugal
clutches and brakes

1945

1953

1960

Start of the partnership between
Robert Scheuffele and Georg Fuhrmann

Move into the new premises
in Bietigheim-Bissingen,
Keplerstrasse(still headquarter today)

Production start ofmechanical pressure switches
for the automotive industry

1970

1989

* 16.10.1909 † 20.02.1966 * 15.01.1912 † 04.02.1982

1938

A view into production

1997

1999

First DIN ISO 9001 company certification

Founding of subsidiary
SUCO VSE France

1998

2001

Start of market penetration in Asia
by setting up a company pool

Certification to
DIN ISO 9001:2000

Broadening of product expertiseto electronic pressure monitoring

2002

Start of the „fully automaticpressure switch adjusting“
development project with the
Fraunhofer Institute4

Administration building,
Bietigheim-Bissingen

Penetration of themarkets in SouthAmerica and Eastern
EuropeAerial shot of premises,
Bietigheim-Bissingen

2004

Development start of fully automatic
assembly systems for pressure switch
modules

2005
New company name:
SUCO Robert Scheuffele
GmbH & Co. KG
Development of the
SUCO zero clutch

1984
Development of the hex 27
pressure switch series for broad
industrial applications

1979

Further development of SUCO
pressure switches especiallyfor hydraulic and pneumatic
applications

1969
Production start of electromagnetic
clutches and brakes
Set-up of a pan-European sales network

1987
Broadening of the product range
to include custom pre-wiredpressure switches

Strategic alignment
to the industry

1988

1980

Start of sales in the US

Development of thehex 24 pressure switch
series for broad industrial
applications

1999

SUCO VSE France,
Le Mans, France

1993
Development ofpressure dampers for
ABS brake systems in
the automotive industry

2007

SUCO Technologies
Boca Raton, USA

2009

2018

ESI Technology,
Wrexham, UK

Aerial shot of premises,
Bietigheim-Bissingen

2006

2007

2011

Development and production start ofdescenders with centrifugal technology

Founding of subsidiary
SUCO Technologies Inc., USA

Development of the
SUCO thermal brakeEnhancement of the laboratory test
facility for simulating several million test
cycles under different test conditions
Development of the world‘s smallest
pressure switch with adjustableswitching point to 400 bar (patented)

2009

2013

Acquisition of
ESI Technology Ltd. (UK)75-year company
anniversary celebrations

2010

Across-the-board use ofenhanced automaticpressure switch adjusters;
Development of atransmitter series basedon SoS technology

2014
Development of additional
intelligent functions integrated
in mechanical pressure
switches2017

Certification
to DIN ISO
9001:2015

5

6

7

Tradition and Innovation
The preservation of proven traditions and continuous eﬀorts ininnovation enable visions to become successful reality

6

Design and development of new products using the latest CAD
tools.

The best quality products are possible due to the best quality
raw materials.

Products are subjected to comprehensive testing andmeasurements to simulate realistic ambient conditions
and loads.

Computer-aided test bench for engagement speed.

Experienced employees with long staﬀ membership andprofessional competence guarantee high quality.

Ultra-modern production plant with integrated, fullyautomated component handling enables to manufacture
first-class clutches and brakes.

Ready-made clutches are waiting for their delivery to thecustomers.

From here our products are dispatched to customers all over
the world.

7

8

Centrifugal
Centrifugal clutches
clutches andand brakes
brakes8

General technical information on
centrifugal clutches and brakes

How do centrifugal clutches orbrakes work?
Centrifugal clutches and brakes use centrifugal forces to transmit power (clutch) or
to limit speed (brake).
As the brakes are based on a physicalprinciple, centrifugal clutches or brakes
do not require any additional external
power supply, which makes them aperfect solution for safety applications.
Centrifugal clutches and brakes consistof a driving shaft . Around the driving
shaft, there are flyweights  mounted,
which are kept on the shaft by springs
. On the outer side of the flyweights
there are friction pads .

10

1. When the driving shaft starts turning, theﬂyweights and the friction pads are kept together by the retaining forces of the springs.
2. At a predefined speed (engagement
speed), the centrifugal forces overcome
the retaining forces of the springs and thefriction pads do contact the outer drum .
3. The friction pads begin to transmit
power to the drum, but will show a slipping effect until the speed is further
increased to the operating speed, whichmeans a non-slip torque transmission.
Based on long experience and knowhow, SUCO designs the clutches witha safety factor, which guarantees thatthe transmissible torque at the operating speed is higher than necessary. This
ensures a slip free application and thus,
reduces wear and service requirements.

Diﬀerences between a centrifugal
clutch and a centrifugal brake:
The main difference between a centrifugal clutch and a centrifugal brake is in thedrum:
At a centrifugal clutch the drum is not
fixed and will begin to turn when theengagement speed / operating speed isreached.
At a centrifugal brake the outer drum isfix and cannot turn. This causes a braking
force when the friction pads touch the
drum.
When designing and operating centrifugal brakes, there must be a special
focus on braking time and maximum heat.
Please refer to page 13 for further information.







=
=
=
=
=

Driving shaft
Flyweights
Tension spring
Friction pads
Outer housing

3

1
5
2

4

Construction of a centrifugal clutch /brake

Typical applications for centrifugal
clutches:
Centrifugal clutches are mainly used as astart up clutch. A centrifugal clutch allows
the usage of a smaller motor, because
the motor can start loadfree until it hasreached its optimum operating speed, atwhich the load is smoothly added by thecentrifugal clutch.

Typical applications for centrifugal
brakes:The main application for centrifugal brakes
is limiting the speed of e.g.

• descending weight or persons• industrial applications(e. g. safety- and fire doors)• leisure applications(e. g. Go Kart to a safe level)

What are the key criteria whenselecting and designing acentrifugal clutch / brake:
Performance data:• The power which needs to betransmitted (kW)• Engagement speed [rpm]• Operating speed [rpm]• The max. allowable size
By knowing the max. size and power,
the most suitable clutch model canbe chosen, as all models do have a
different performance factor

Design and dimensions:
Input design:• Shaft diameter
Output design:
There are different output designs
possible. So we need to know if you use
Only core version
Flex coupling
Belt Pulley design
Ball bearings or not

•
•
•
•

Please refer to pages 14-15 for further
information.

Additional required information for
centrifugal brakes:• Load in kg• Max. braking time and braking frequency

11

Calculating the torque:

Criteria

F-TypeS-TypeW-TypeP-TypeGeneral technical information on
centrifugal clutches and brakes

M = torque [Nm]

Page

16

18

20

22

2.5

1.5

1.0

1.75 - 1.25n

= speed of rotation [rpm]P= power [kW or hp]

Compact design
Noisefree operationP

M = 9550 · –n [kW]Easy replaceable partsP

M = 7121 · –n [hp]

Performance factor
Selection matrix of SUCO centrifugal clutches

Performance factor

Engagement speed:

The performance factor is a measure
to compare the power transmission of
clutches. The W-Type clutch has a performance factor of 1.0. The F-Type at thesame size and the same flyweight masscan transmit 2.5x more torque.

The engagement speed of centrifugal
clutches indicates the speed at which
the centrifugal forces overcome theretaining forces of the spring and thefriction pads touch the outer drum.

Example of engagement behaviour
Clutch slipping

engagement

Operating speed:
At the operating speed the friction pads
are in full contact with the drum andtransfer the torque without slipping.

100

80

60

Variances in the motor speed must be
considered when determining the operating speed. Therefore SUCO uses asafety factor which ensures a non-slipping application.

40
20

Speed of rotation [rpm]nE = engagement speed, nB = operating speed

1950

2000

1850

nB

1900

1750

1800

1650

1700

1550

1600

1450

nE

1500

1350

1400

1250

1300

1150

1200

1100

1050

950

1000

850

900

0
800

Torque [Nm]forClutch engaged
Torque transmission

12

To minimise wear of the friction pads,
the target is to pass quickly through theengagement speed band to the operating speed.
General tolerance
speed ± 100 rpm.

ClutchMotor

Clutch not engaged

From the first engagement until theoperating speed the friction pads will
slip, what will cause wear of the pads.

All SUCO clutches are dry-operated.

Centrifugal brakes:
Standard centrifugal brakes are used tolimit speed – they cannot bring a system
to standstill. The basic principle is tokeep a balance between the load of thedriving side and the braking torque.
During the operation there is a constantfriction which generates heat.

The amount of generated heat depends
on various factors:• Transmitted braking torque• Brake speed• Duration of the braking operation• Size of the friction surface• The mass of the brake drum that has
to be heatedOver the braking time the temperature
curve rises very steeply at the start andthen gradually approaches a maximum.
The temperature at the friction surface(T 2) is substantially higher than the temperature (T1) at the outer surface of thebrake drum.
Nevertheless, the brake drum can become
very hot during operation and is a sourceof danger. The authority responsible for
operation of the machine is solely responsible for ensuring that suitable protective
measures are taken.
The maximum temperature must notexceed the manufacturer's maximum
permitted temperature for the friction

material, otherwise the linings may
be damaged. This can lead to a loss ofeffectiveness of the brake and, in the worst
case, to destruction of the brake.
To prevent this, detailed data about theapplication is required when designing
centrifugal brakes:

•
•
•
•
•
•

Operating speed of the system tobe braked
Engagement speed of thecentrifugal brake
Braking torque required at thebraking speed
Changes in the braking torque
Braking times and frequency
Field of application

Centrifugal brakes are speed limiting
devices and are finding increased use inlowering equipment. In such cases, thespeed of lowering corresponds to thebalanced condition between the speed
governed by load torque and the speed
governed by braking torque.

Friction produces heatCentrifugal brakes convert mechanicalenergy into heat, which is generated
between the linings and the brake drum,
and mostly heats up the latter.
The temperature distribution illustrated
above on a sectioned brake drum clearlyshows the higher heating of the drum inthe region over the flyweights.

13

Dif ferent solutions,driven-side
To accommodate the variety of transmission requirements, SUCO offers a wide and ﬂexible productrange. Both axial and radial drives can be supplied.
All centrifugal brakes and clutches must only be used in conjunction with a suitable drum
or belt pulley. The operation of a clutch or brake without a suitable drum or belt pulley isforbidden. Non-compliance can result in injury to persons.

Model K

Core version -KThis version without a drum is supplied whena clutch or brake drum already exists in thecustomer's set up, or a suitable component forthis purpose is available on the output side.

Model GThe drum must be accurately centred
and securely mounted.

For higher torque transmission a clutch
can be equipped with several rows of
ﬂyweights.

The shaft diameter can be varied andtapered mountings are possible.

Figure 1

Figure 2

Core version with drum -GThis version can be used to connect two shaft
ends.

14



The installation must have the lowest
possible misalignment in both radial andangular directions.



Excessive misalignment can result in
rapid wear of the linings orcomplete failure of the clutch.

Figure 3

Model E

Unit version -EWhere it is not practical to align both shaft
ends or one shaft end and the drum, a bearing
can be used between hub and drum.
As shown in Figure 4, the output drive can bedirected through a tolerance ring on to which
a belt pulley, a timing-belt pulley, or a mounting ﬂange can be pressed.
Figure 5 shows a go kart clutch with a drive
ﬂange for a chain sprocket.

Figure 4

Figure 5

Model A

Unit version with flexible coupling -AThe easiest way of compensating radial andangular misalignments between two shafts is
to use a flexible shaft coupling.
The ﬂexible coupling can be installed andlocated either radially or axially.

Figure 6

Model R

Belt-pulley version -RWhere torque is transmitted through a V-Belt,
the belt groove(s) can be machined in the
drum. Single, duplex or multiple groove pulleys
can be produced in this way.
Depending on the clutch size, effective pulley
diameters from ca. 80 to 270 mm can be incorporated.

Figure 7

Figure 8

Figure 9

Figure 10

Common groove forms are: SPA, SPB, SPZ,
and Poly-V according to DIN/EN.
Figure 7 to 10 show different belt-drive
clutch versions.
The clutch shown in Figure 9 with a split pulley allows elimination of a tensioning pulley. The V-Belt is tensioned by changing thespacer shims between the two pulley halves.

15

F-TypeSelf-increasing clutch
Construction and mode of operation

4

3

2
5

1

2

3

5
1

4







=
=
=
=
=

Driving hub
Flyweights
Tension spring
Friction pads
Outer drumHigh efficiency with a self-increasing effect
Performance factor of 2.5
Compact design
Easy to service

16

F-Type

Performance data and dimensions

M at nE 1250 and
nB 2500 [Nm]recommended
motor power[kW] 3M at nE 1500 and
nB 3000 [Nm]recommended
motor power[kW] 3

50

10

14

12

1.3

0.17

2

0.3

F02

60

15

18

15 (5/8)

4

0.5

5

0.8

F03

70

15

22

15; 20 (7/8)

7

0.9

10

1.6

F04

80

15

28

14 - 25 (3/4; 7/8)

4

0.3

11

1.4

16

2.5

øD

F05

90

20

35

18; 20; 25 (3/4; 1)

10

0.8

26

3.4

40

6.3

ød

F06

100

20

35

20; 24; 28 (3/4; 1)

16

1.3

42

5.5

60

9.4

F07

110

20

40

28; 35; 40 (1)

25

2.0

70

9.0

100

15.7

F08

125

20

50

25; 38; 49 (3/4; 1)

40

3.2

120

15.7

180

28.3

F09

138

25

55

30; 38; 48 (1)

90

7.0

240

31.0

320

50.0

F10

150

25

60

38; 48; 49

125

10.0

340

44.5

470

74.0

F11

165

30

65

42; 50; 55 (1 7/16)

220

17.2

620

81.0

870

136.0

F12

180

40

75

50; 60 (2 3/8)

460

36.0

1200

157.0

1700

267.0

F13

200

30

75

35; 55; 65 (2 3/8)

520

41.0

1300

170.0

1850

290.0

d max. =
M
=
nE
=
nB
=

max. bore dia.
torqueengagement speed
operating speed

1)recommended
motor power[kW] 3F01

M at nE 750 and
nB 1500 [Nm]d max. [mm]highB [mm] 1

normalD [mm]

low

Type Number

standard bore
diameterd [mm] (inch) 2

Standard rotational speedBd =bore dia.

D =inside dia. of drum

B =ﬂyweight width

The transmitted power increases as the width B is increased.

2) Tapered bores and special dimensions can be manufactured on request.
3) Motor power is calculated using a safety factor of 2.

Final selection of the clutch should be accomplished by SUCO!

direction of rotation
self-increasing effecteffective
centrifugal
force
centrifugal
force

17

S-TypePin-guided clutch withthree fly weights
Construction and mode of operation

2

5

3
4

3
1
1

2

5

6
4

 =
 =
 =

Shaft
Flyweights
Cylindrical pin

 =
 =
 =

Low noise level by guided pins
Performance factor of 1.5
Compact design

18

Tension spring
LiningClutch drum / Cover disc

S-Type

Performance data and dimensions

d max. [mm]M at nE 750 and
nB 1500 [Nm]recommended
motor power[kW] 3M at nE 1250 and
nB 2500 [Nm]recommended
motor power[kW] 3M at nE 1500 and
nB 3000 [Nm]recommended
motor power[kW] 3high

B [mm] 1

normalD [mm]

low

Type Number

standard bore
diameterd [mm] (inch) 2

Standard rotational speed

S04

80

25

24

15 (3/4; 7/8)

4.3

0.3

12

1.6

17.5

2.8

S05

90

25

30

14; 30 (3/4; 1)

7.5

0.6

212

2.8

31

4.9

S06

100

25

24

20; 24; 28 (3/4; 7/8)

11

0.8

30

4.0

43

7.0

S07

110

25

30

28; 30 (1)

15

1.2

45

6.0

64

10.0

øD

S08

125

25

40

20; 30 (1; 1/2)

30

2.4

85

11.0

124

20.0

ød

S09

138

25

30

17; 30 (1; 1 1/8)

40

3.0

112

15.0

160

25.0

S10

150

35

40

38; (1 1/8)

78

6.0

216

28.0

310

49.0

d max. =
M
=
nE
=
nB
=

max. bore dia.
torqueengagement speed
operating speed

1)

B

The transmitted power increases as the width B is increased.

2) Tapered bores and special dimensions can be manufactured on request.
3) Motor power is calculated using a safety factor of 2.

Final selection of the clutch should be accomplished by SUCO!

d =bore dia.

D =inside dia. of drum

B =ﬂyweight width19

W-TypePin-guided clutch with
two fly weights
Construction and mode of operation

5

6
2
4

3

2

6

1

3
4
1

5








Low noise level by guided pins
Easy to service
Performance factor 1.0

20

=
=
=
=
=
=

Hub
Flyweights
Cylindrical pin
Tension spring
LiningCirclip

W-Type

Performance data and dimensions

d max. [mm]M at nE 750 and
nB 1500 [Nm]recommended
motor power[kW] 3M at nE 1250 and
nB 2500 [Nm]recommended
motor power[kW] 3M at nE 1500 and
nB 3000 [Nm]recommended
motor power[kW] 3high

B [mm] 1

normalD [mm]

low

Type Number

standard bore
diameterd [mm] (inch) 2

Standard rotational speed

W04

80

15

15

15

1.7

0.14

4.6

0.6

6.6

1.0

W05

90

20

25

14 (5/8)

3.7

0.3

10.3

1.4

14.8

2.3

W06

100

20

30

30

5.7

0.45

16.0

2.0

23.0

3.6

W07

110

20

40

–

8.6

0.7

24.0

3.2

34.5

5.5

øD

W08

125

20

40

20; 30 (1 1/2)

14.0

1.0

38.5

5.0

55

8.5

ød

W09

138

25

55

–

27.0

2.2

75.0

9.8

110

17

W10

150

25

60

38 (1 1/8)

36.5

3.0

102

13

145

23

d max. =
M
=
nE
=
nB
=

max. bore dia.
torqueengagement speed
operating speed

1)

B

The transmitted power increases as the width B is increased.

2) Tapered bores and special dimensions can be manufactured on request.
3) Motor power is calculated using a safety factor of 2.

Final selection of the clutch should be accomplished by SUCO!
d =bore dia.

D =inside dia. of drum

B =ﬂyweight width21

P-Type

Asymmetric pivot clutch
Construction and mode of operation

3

6

5

1

1
2

2
3

4

5
4

 =
 =
 =

Flyweight
Tension spring
Lining

 =
 =
 =

Clutch drum / Cover discShoe pivot
FlangeExtremely narrow design
Lowest noise level of SUCO clutches
Performance factor between 1.75 and 1.25
(depending on direction of rotation)22

P-Type

Performance data and dimensions
øDStandard rotational speed

D [mm]

B [mm]1

M at nE 750 and
nB 1500 [Nm]recommended
motor power[kW] 2M at nE 1500 and
nB 3000 [Nm]recommended
motor power[kW] 2highType Number

low

P11

187

30

175

13

460

60

P12

193

30

180

14

500

70

Other sizes are available on request.
M

nE
nB

=
=
=

torqueengagement speed
operating speed

1)

The transmitted power increases as the width B is increased.
2) Motor power is calculated using a safety factor of 2.
Final selection of the clutch should be accomplished by SUCO!

Key to model codes
Type designation:
F – Type
S – Type
W – Type
P – Type

Size:
See table"Performance data
and dimensions" onpages 17, 19, 21, 23

F

E

08

Quantity(depending on model driven
side)

K, G, E, A, S: Number ofrows of flyweights
R: Number of grooves

1

B

D =

inside dia. of drum

B =ﬂyweight width

Models driven side:
K – Core
G – Core with drum
E – Unit version with bearing
R – Belt pulley version
A – Axial output with flexible
coupling
S – Customer special

1 –Bore, Input Side,
1 – Cylindrical hole
2 – Tapered hole (core side)
3 – Tapered hole (bearing side)
4 – Gear teeth
5 – Thread
6 – Flange
9 – Special form

XXXX

Consecutive number

23

Electromagnetic
Electromagnetic clutches
clutches andand brakes
brakes24

General technical information onelectromagnetic clutches and brakes

How do electromagnetic clutchesor brakes work?
The working principles of electromagnetic
clutches and brakes are very similar.
Electromagnetic clutches:
The stator body  contains the field coil, which is a copper coil cast in synthetic
resin. The clutch is activated by applying a
direct current to the field coil. This creates amagnetic field, which electromagneticallyattracts the armature plate  towards the
input drive hub  with its friction lining
, and so allows torque to be transmitted
from the input side to the output.
The axially-located output drive hub separates from the input side when
the current is cut off. A return spring 
ensures that the armature plate separates
from the input hub.
26

Electromagnetic brakes:
The stator body  contains the field coil ,
which is a copper coil cast in synthetic resin.
When current is applied a magnetic field iscreated, which attracts the armature plate towards the friction lining , and sotransmits a braking torque to the output
hub .
When the current is off, the return spring
pulls the armature plate back to its original
position.
SUCO is your perfect partner when you
require a specifically fitted design for anelectromagnetic clutch or brake, whichmatches perfectly with your applicationand design needs.

As SUCO manufactures electromagnetic
as well as centrifugal clutches and brakes,
we can even combine the two principles toprovide you with a solution which uses theadvantages of both technologies.
You will find these special solutions
starting from page 39.

Typical applications
Among many other applications, SUCO
electromagnetic clutches and brakes areused in construction machines, agricultural machinery, machine tools, pumps andcompressors, centrifuges, belt conveyors
and cleaning machines.









=
=
=
=
=
=
=

Stator body
Field coil
Friction lining
Armature plate
Return spring
Hub
Input drive hub

6
5

5

3
1

2

4
7

Electromagnetic clutch

3
1

2

6
4

Electromagnetic brake
Construction and mode of operation of a electromagnetic clutch /brakeTechnical explanations andimportant installation notes:

All SUCO clutches and brakes are normally open.

When SUCO electromagnetic clutches
and brakes are correctly selected, they
are trouble-free, re quire no maintenance,
and are extremely reliable.

Depending on the size of a clutch or abrake, the installation must provide foran air gap of between 0.2 and 0.5 mm
between the drive hub and the armature plate. The purpose of this air gap isto ensure complete separation of the input and output drives when no current isapplied.

SUCO clutches are dry-running clutches.
To ensure correct operation, grease andoil must be kept away from the clutches'and brakes' friction surfaces.
Electromagnetic clutches and brakes require a DC power supply. They normallyoperate on a 24 VDC supply, but can also
be supplied for other voltages (6, 12, 48
and 190 VDC). As standard the power
supply is via a 2-core cable 0.4 m long.

SUCO electromagnetic clutches andbrakes can be installed on ﬂanges or
shafts. Flange-mounted versions requirea suitable ﬂange surface. The magnet component of the shaft-mounted
models must be secured against rotation,
the torque support must not be rigidly
fixed.

If a SUCO output drive is not used, it
is important to ensure that there areclearance holes to accommodate therivet heads when installing the armatureplate.
The armature plate is centred by thescrews which hold the return spring tothe output component. When the armature plate is installed, it must remain free
to move axially against the return spring.
The standard form of output is an axial
drive with a bore and keyway, which
passes through a flange. On the subsequent pages also other variants areshown.

27

E-TypeElectromagnetic clutch
without bearing
Construction and mode of operation
When assembling, the stator must be accurately centred on the input drive hub, otherwise the hub
may rub on the stator body and cause damage to the clutch. For further installation advises andtechnical details, please refer to page 28 .

2
1
5

3
4

4
1

3
2

5
6

 =
 =
 =

Stator bodyConnection cable
Input drive hub

 =
 =
 =

Armature plate with Return spring
Output drive hub

Model A

Model C

Clutch with input
drive hubClutch with input &output drive hub

Basic version without
output drive hub.
Connection to output
side by screws.

Basic version withaxial output drive(shaft - shaft).

Performance data and dimensions
Size

E02

E03

E04

E05

E06

E07

E08

E09

Torque [Nm]For reference purposes1)

1.0

4.5

8.0

20.0

38.0

80.0

150.0

280.0

10.000

8.000

6.000

5.000

4.000

3.000

3.000

2.000

Speed of rotation max. [rpm]28Power [W] T = 20° C

9

12

20

23

32

40

55

72

d max. [mm]2)

10

20

25

30

40

50

70

80

D [mm]

60

80

100

125

150

190

230

290

L1 [mm]

26.5

28.0

31.0

36.0

40.5

46.5

55.4

64.0

L2 [mm]

38.5

43.0

51.0

61.0

70.5

84.5

103.0

119.0

B [mm]

52

72

90

112

137

175

215

270

F [mm]

42

63

80

100

125

160

200

250

H [mm]

29

46

60

76

95

120

158

210

1)

Depending on design of installation, operating and ambient conditions

2)

Keyway to DIN 6885/1

Electromagnetic clutchwith bearing

G-TypeConstruction and mode of operation
Due to the containing bearing, the stator body does not have to be centred on the input drive.
For further installation advises and technical details, please refer to page 28 .

2

3
5

4

1

1

4

5

3
2

6

 =
 =
 =

Stator bodyConnection cable
Input drive hub

 =
 =
 =

Armature plate with Return spring
Output drive hub

Model A

Model C

Model D

Clutch with input
drive hubBasic version without output
drive hub. Connection to output
side by screws.

Clutch with input and output
drive hubBasic version with axial output
drive (mounted on one shaft).
Output drive hub with bearings.

Clutch with input &output drive hub
Basic version with axial output
drive (shaft - shaft).

Performance data and dimensions
Size

G03

G04

G05

G06

G07

G08

G09

Torque [Nm]For reference purposes1)

4.5

8.0

20.0

38.0

80.0

150.0

280.0

Speed of rotation max. [rpm]

8.000

6.000

5.000

4.000

3.000

3.000

2.000

Power [W] T = 20° C

12

20

23

32

40

55

72

d max. [mm]2)

20

25

30

40

50

70

80

D [mm]

80

100

125

150

190

230

290

L1 [mm]

41.0

45.0

52.0

56.5

67.0

75.4

90.0

L2 [mm]

68.0

72.5

92.0

102.5

112.0

130.5

153.0

L3 [mm]

56.0

65.0

77.0

86.5

105.0

123.4

145.0

B [mm]

72

90

112

137

175

215

270

F [mm]

63

80

100

125

160

200

250

H [mm]

46

60

76

95

120

158

210

1)

Depending on design of installation, operating and ambient conditions

2)

Keyway to DIN 6885/1

29

B-TypeElectromagnetic brakes
Construction and mode of operation
The stator body must be installed concentrically with the output side. For further Installation advises
and technical details, please refer to page 28.

2
1
4

5

3

4

1

3
2

5
6

 =
 =
 =

Stator bodyConnection cable
Friction lining

 =
 =
 =

Armature plate with Return spring
Output drive hub

Model A

Model B

Model C

Brake without hub
Basic version without drive hub.
Connection to output side by screws.

Brake with internal hub
Basic version with axial output
drive. Internal hub.

Brake with external hub
Basic version with axial output
drive. External hub.

Performance data and dimensions
Size

B02

B03

B04

B05

B06

B07

B08

B09

Torque [Nm]For reference purposes1)

1.0

4.5

8.0

20.0

38.0

80.0

150.0

280.0

10.000

8.000

6.000

5.000

4.000

3.000

3.000

2.000

9

12

20

23

32

40

55

72

Speed of rotation max. [rpm]Power [W] T = 20° C

30d max. [mm]2)

8

17

20

30

35

42

50

75

D [mm]

60

80

100

125

150

190

230

290

L1 [mm]

21.0

22.0

24.5

28.0

31.0

35.0

41.5

48.0

L2 [mm]

24.0

25.5

28.5

33.0

37.5

42.0

50.4

59.0

L3 [mm]

33.0

37.0

44.5

53.0

61.0

73.0

89.5

103.0

B [mm]

52

72

90

112

137

175

215

270

F [mm]

42

63

80

100

125

160

200

250

H [mm]

29

46

60

76

95

120

158

210

1)

Depending on design of installation, operating and ambient conditions

2)

Keyway to DIN 6885/1

Key to model codes
Type designation:
E - Type
G - Type
B - Type

E

02

Size:
See table"Performance data
and dimensions" onpages 28-30

Model:A
B
C
D

Voltage:A - 6 VDC
B - 12 VDC
C - 24 VDC
D - 48 VDC
G - 190 VDC

A – C – 08 – 00 – X X X

BORE DIA. INPUT DRIVE HUB
Important!
The number is a code,
not the diameter.

BORE DIA. OUTPUT DRIVE HUB
Important!
The number is a code,
not the diameter.

Consecutive
number31

Dif ferent solutions,driven-side
To accommodate the variety of transmission requirements, SUCO offers a wide and modular
product range. Special customized versions are available on request.

Clutch-brake combination (L-Type)
This model can be manufactured on request
in the standard sizes. For performance data
and dimensions, see E-Type (page 30) and
B-Type (page 32).

Figure 1

With bearing-supported flange
A ﬂange supported on a hollow shaft andbearings is used for the output side connection.

Figure 2

With a flexible coupling
If an axial or angular misalignment is to be
expected between two shafts, a ﬂexible
coupling can be attached.

Figure 332With bearing-supported belt pulley
The output drive is a single-groove belt
pulley which is supported on a hollow shaft.
The pitch diameter can be supplied to thecustomers' requirements. Multiple-groove
pulleys can also be supplied.
Common groove forms are: SPA, SPB, SPZ, andPoly-V or DIN/EN.

Figure 4
With belt pulley supported on separate
bearings
Here the output drive is a single or multiple
groove belt pulley which is separately
supported, not on the hollow shaft of theelectromagnetic clutch.
The pitch diameter of the pulley can besupplied to the customers' requirements.
Common groove forms are: SPA, SPB, SPZ, or
Poly-V or DIN/EN.

Figure 5

With sprockets
A chain sprocket mounted on a bearing
supported ﬂange transmits torque on the
output side.

Figure 6

33

Customized solutions
Customized solutions

34

General information on special designs
and customized solutions

Customized solutions from SUCO
Where the use of a standard version
is not practical or the power capacity
inadequate, one of our customerspecific designs can provide a solution.
Here, SUCO has many years of experience.
In cooperation with the customer, ourengineers study enquiries for theirfeasibility and produce a cost-effective
solution. Every effort is made to ensurethat the design of the product willcomply with the customers' requirements and wishes.

36

SUCO has its own workshop with a wide
choice of different CNC machines whichenable to satisfy your specific needsfrom single piece orders up to serial
quantities.
There is a strong link between SUCO
engineering and production which
ensures highest efficiency by matchingcustomer needs, product design andmachinability.
On the following pages SUCO showsa small selection of the numerous
ways of solving drive problems, using

combinations of centrifugal clutches
and brakes or electromagnetic clutches
and brakes that we can offer. They canform the basis for complete systemsolutions realised in combination withother drive components.
SUCO has patented many designs andvariants in this field.

Examples of dif ferent
customized solutions
Electrically-controlled centrifugal brake

An electrically-controlled centrifugal brakeallows braking at speeds below the operating
speed of the system that is to be braked.
When power is not applied, the brake disc of aspring-loaded brake and the brake drum of acentrifugal brake are not free to rotate. Whenthe engagement speed, which is below thenormal operating speed, is exceeded, the centrifugal brake applies a braking torque.

Figure 1

Centrifugal brake „SUCO-ZERO“This brake is used to bring a system quickly tostandstill if a pre-defined speed is exceeded.
The system can then be reset manually to its
original condition.

Figure 237

E xamples of dif ferent
customized solutions
New safety system SUCO Smartstop

SUCO Smartstop brake is a combination of aclassic centrifugal brake to control the speedof a wind turbine and thermal actuated static
holding brake to bring down the system to acomplete stop.

Figure 3

Electromagnetic brake in combination
with a centrifugal brake

This version is used for lowering loads at adefined speed with no electric power applied(power failure in the system).
In normal operation, the load is held by theelectromagnetic brake. Power failure causes
the electromagnetic brake to release.
To prevent the uncontrolled descent of theload, the centrifugal brake operates to lower
the load at a defined speed.

38

Figure 4

Centrifugal clutch with electromagnetic
brake and belt drive

In this case the centrifugal clutch is used tostart a heavily-loaded machine. This protects
the drive, which can accelerate at no-load
until the engagement speed is reached.
Power is transmitted by V-belts. When thedrive is switched off, the electromagnetic
brake can be used to bring it to standstill.

Figure 5

Self-inducing electromagnetic clutch

A belt pulley driven by an internal-combustion engine is fitted with permanent magnets and serves as the rotor of a generator.
The stator consists of a pack of laminations
with copper windings.
The electric current induced in the windings
is fed to the coil of an electromagnetic clutch.
This switches automatically at a certain speed
to connect the drive to a machine (in this case
via a timing-belt pulley).
Where necessary, it is possible for the electromagnetic clutch to be switched on or off at
any speed manually or by a control system.

Figure 6

39

41

SUCO
worldwide

An innovative and reliable
solution provider at your side

HEADQUARTERS
GERMANYSUCO Robert Scheuﬀele
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BELGIUM40

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Co., Ltd.
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LEBANONSAUDI ARABIAEHE Egyptian HydraulicEngineeringw
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