We are certified to
DIN EN ISO
9001:2008

CNC Dividing Heads

CNC Rotary Axes

Detlev Hofmann GmbH
CNC Dividing Heads / CNC Rotary Axes

As a design and development supplier of CNC-dividing
heads and rotary axes with more than 25 years ofexperience we know, that precision, flexibility andperformance are the key factors to the success andprogress of our customers. Whether in thesubcontracting business, tool and die manufacturing,jewellery industry, aerospace industry or in medical anddental techniques, our dividing heads help you toachieve high precision and even higher productivity.

Detlef Michael Hofmann
shareholder andManaging Director

page 4 - 7

HOWIMAT gear-type units
With patented recirculating ball gear system

page 8 - 13

TMI Torque series (with torque motor)- TMI built-in type
- TMI-FL built-in type flange version

page 14 - 21

Peripheral devices / additional equipment- fixtures- base plates / counter bearings- tailstocks- electrical controls

page 22 - 27

Equipment

Applications / branches- sample applications- references

page 28 - 35

Examples

TMI series

Gear-type series

Detlev Hofmann GmbH
Präzisions-Maschinenbau- About us ...
- multi-face machining

About us...
We are a successful supplier of our products for more than 50 years

Customer satisfaction is our main target
The Detlev Hofmann GmbH, with the head office in Pforzheim, is a company that specialises on thedevelopment, manufacturing and the assembly of CNC controlled dividing heads and their corresponding
accessories. In existence for more than 50 years, the company has always been known as a medium-sized,
flexible company with the main target of delivering sustainable and innovative products e.g. customised
solutions for the machine-tool industry based around our standard units. Due to our long standing experienceand the build up of know-how, which shows in our products, we are in a position to supply sophisticated andup-to-date products to our customers. Customer requirements are paramount and we make sure areestablished and satisfied in each step of the order process. This creates solutions that are tailored exactly tothe needs of the client. We see ourselves as development suppliers with the aim of establishing a long termcooperative and trusting relationship between ourselves and our customers. This is the corporate policy andinnovative energy
energy of Detlev Hofmann GmbH. To engage
in the complex requirements and find a clear, individual
and precise solution that fulfils the customers exacting
specifications is our aim - from development andmanufacturing to service and support.

The conception of a dividing head in the working area of amachine-tool, according to our customers exacting
specifications

4

What else sets us apart?
A flat hierarchy, quick decision making and big in-house production strength in depth gives us the big advantage
of being able to react quickly and flexibly to customer demands. Specialised and well trained employees
develop, produce and assemble premium dividing heads and the appropriate peripheral devices. With therequired skill and feeling each of our employees engages in his duties, providing dependable quality. We set ahigh value in the active co-operation of all our employees and also in a faithful and fair working atmosphere.
Due to the highly skilled workforce and their pool of experience and knowledge and the use of the most modern
CNC machine-tools in our production, we have the ability to manufacture all of the required components in ourown workshop. With constant quality and dimensional tests on modern measuring machines throughout the
production and assembly process, we can guarantee the constant quality level of our products
You can also benefit from the knowledge and skill of our technical team and the structured head office andrealise, that with the Detlev Hofmann GmbH you have the right partner in every case.

Insights

5

Multi-face machining
Your advantages - overview

Using CNC dividing heads and rotary axes on required applications will put you in a position to increase yourmachining capabilities with an additional 4th or 4th/5th axis. We offer you the possibility to achieve your specificmachining task in an efficient, productive and cost-effective way, by using our up-to date range of equipment.

Advantages of multi-face machining
reduced number of settings guarantees reliable geometrical accuracies between each machining step
positioning inaccuracies due to multi setting are not applicablebetter progressing sequences e.g. with cross over (e.g. cross holes ...)
increased productivity due to shorter cycle times, setting times and work-piece handlingincreased efficiency and reliability because of a lack of uncontrolled handling-timeless clamping positions reduces the cost of the required fixtures

6

Advantages of our dividing heads and rotary axes
significant reduction of non-production timehigh cutting efficiency due to rigid and at the same time compact design
no hydraulic components and service requirements (gear driven units only)
no additional clamping system required (gear driven units only)
our CNC dividing heads and rotary axes are easy to interface mechanically and electronically inexisting systems

1) clamping OPEN *400 ms0 ms

400 ms2) acceleration

150 ms

100 ms

100 ms3) linear speed

150 ms4) deceleration

150 ms5) clamping CLOSE *400 ms0 ms

400 ms1250 ms

400 ms1000 ms

0

0

TOTAL

1500

500

1000

200 ms
100 ms

1500

0 ms
100 msprocess time
200 msHofmannTorque series

process time
400 msHofmannGear-type unit

process time
450 msConventionalscrew drive

Comparison of non-productive times
for positioning cycle of 90°

0

500

1500

1000

500

1000

Times shown are approximate* times for clamping system “open” and “close” result in the sum of enabling time set in the control system, times for the switching of thevalves and time consumption until the required hydraulic pressure is achieved, etc.
Approximate 90% of all HOWIMAT CNC dividing heads are manufactured and delivered without an additional clamping system, because
the patented recirculating ball gear offer exceptionally high torsion stiffness.
Only approxinately 10% of all HOWIMAT CNC dividing heads require an additional hydraulic clamping system, normally only for thefollowing applications:- clamping of the counter bearing on tilting axis (depending an the application, rotary axis requires no additional clamping)- clamping of the counter bearing when using swivelling ridges or applying extreme tangential forces during machining

7

HOWIMAT gear-type units... with patented recirculating ball system

Technical features:
highest precision due to patented recirculating ball gear systemno additional clamping of the dividing head spindle required
high positioning speed
optimal torsion stiffness
very compact design
5 sizes available
big spindle bore
wide range of additional equipment available
suitable for diversified applications

Our axes consist of:heavy duty, high precision axial-radial roller bearings
patented recirculating ball gear system
auxiliary transmission (bevel gear drive or belt-drive system)completely sealed and precision-ground housing

8

The patented recirculating ball gear system is the heartof the rotary table and is implemented in each CNC
dividing head of our gear drive series.
The gear drive:

enables precise positioning of thespindlecan accept high torque forces
has easy backlash adjustment

1

Gear-type series

Functional description of the recirculating ball gear drive system

32
How it works?
The balls (5) are actuated by a circular cam to lift them up and back down into a fixed tooth disc (4). The second
tooth disc (3) accepts the balls, but has a different number of teeth.
In contrast to contemporary gear drives, torque and overload are generally transmitted by two gear teeth, the
HOWIMAT precision recirculating ball drive system has a large number of balls engaged in the transmission.
Nearly 40% of the balls on the gear circumference are supporting the transmission. This generates a very highstiffness in torsion of the gear, which is irreversible. Therefore most applications don't require any additional
clamping system, assuming the proper sized unit is selected.
The entire gearing area is used for transmission even for small angular pitches and therefore the precision of
the recirculating ball gear is ensured for an extended period of time, even if a load is concentrated in the same
point for an extended period of time.
Our system provides a major benefit over conventional gear systems in production environments, as
conventional systems will wear locally on certain position areas of the gear, something which is unavoidable.
Using our system we completely remove this problem which has been the major flaw of existing systems since
their inception.
9

HOWIMAT gear-type units
Main dimensions

A

B

C

D

E1 x E2 x E3

spindle-ø

spindle bore

length ofspindlecentre height(mm)housing outside
dimensions

80.2

80

35 H6

80

from 50

100x 100x 74

125.2

125

60 H6

110

from 75

150x 150x 95

160.2

160

80 H6

135

from 95

190x 190x 120

220.2

220

120 H6

155from 125

250x 250x 140

320.2

320

200 H6160

from 182,5365x 365x 145

size

Subject to change without prior notice!

E3

C

A
B

D

E2

E1

10

Gear-type series

Design variations

CNC .../K (motor cross - left or right side)
CNC .../Z (motor axially parallel - left or right side)
1-axis version

CNC .../A2
2-axis version

CNC .../Z... (2 to 5 spindles)
multi-spindle 1-axis version

CNC .../Z... (2 to 5 spindles)
multi-spindle 2-axis version

11

HOWIMAT gear-type units
weight, speed .....

size

weight in kg(approx, w/o motor)

pitch circle ofgearing
in mm

required motor
torque in Nm
in Nm

speed ***
(version K)
in rpm80.2

Standard
Option

5 kg

74 mm

1,0 - 2,0 Nm

0,35 s-125.2

Standard
Option

15 kg

117 mm2,0 - 3,0 Nm

0,55 s0,45 s120 : 160 : 125 min-1
50 min-1

160.2

Standard
Option

25 kg

152 mm

3,5 - 6,0 Nm

0,55 s0,45 s120 : 160 : 125 min-1
50 min-1

220.2

Standard
Option

44 kg

210 mm6,0 - 10,0 Nm

0,80 s0,65 s120 : 160 : 125 min-1
40 min-1

320.2

Standard
Option

90 kg

310 mm12,0 - 20,0 Nm

1,00 s-180 : 1-

16,6 min-1-*

60 : 150 min-1
higher rpm´s upon request !!

With HOWIMAT CNC-dividing heads no additional clamping is required.
If an increased mass moment of inertia could be created, due to fixture or work-piece design, please contact us.

** reduction ratio may vary for Z-version (additional tooth-belt drive)*** higher rpm in Z-version
Subject to change without prior notice!

12

cycle time * reduction
90° (approx.)
ratio **
in sec.
(Version K)

vertical

maximum load *horizontal with tailstock

maximum forces
verticalhorizontal

rated torquedynamic **max. tangential moment
static ***(tilting moment)(unclamped)

Size
80.2

30 kg

15 kg

30 kg

1800 N

60 Nm

max.

125.2

125 kg

70 kg

150 kg

24000 N

300 Nmmax. 160 Nm

max. 280 Nm

160.2

350 kg160 kg

350 kg

35000 N

600 Nmmax. 250 Nm

max. 500 Nm

220.2

1000 kg

400 kg1000 kg

50000 N

2000 Nmmax. 600 Nm

max. 1200 Nm

320.2

1800 kg

800 kg1800 kg

80000 N

3500 Nmmax. 1400 Nm

max. 2500 Nm

*

30 Nm

max.

60 Nm

during simultaneous machining, the load should not be bigger than 50% of the maximum, due to the regulating performanceof the motor.

** the shown driving torque is the maximum load. The possible driving torque depends on the chosen motor(if motor type is known, figures can be given upon request)*** the shown tangential moment is the maximum permissible load with the corresponding elastic deformation(when machining at the load limits, please contact us. Additional clamping systems upon request)

size

Gear-type series

Load details and accuracies

radial and axial
run out

indirect measuring system
indexing accuracy *repeatability *direct measuringsystemin arc sec. **80.2Standard
Option+/- 0,0030 mm+/- 0,0015 mm+/- 0,006 degr.

+/- 0,002 degr.

125.2

Standard
Option+/- 0,0030 mm+/- 0,0015 mm+/- 0,004 degr.

+/- 0,002 degr.

+/- 2,5”

160.2

Standard
Option+/- 0,0030 mm+/- 0,0015 mm+/- 0,004 degr.

+/- 0,002 degr.

+/- 10,0”220.2Standard
Option+/- 0,0030 mm+/- 0,0015 mm+/- 0,004 degr.

+/- 0,002 degr.

320.2

Standard
Option+/- 0,0050 mm+/- 0,0020 mm+/- 0,003 degr.

+/- 0,0015 degr.

+/- 10,0”+/- 5,0”+/- 5,0”+/- 2,5”+/- 2,0”* when positioned from one side+/- 1,0”0,001 degr. = 3,6”** for higher accuracies direct measuring systems are available:
e.g. Heidenhain ECN 225 (+/- 10”); RCN 226 (+/- 5”); RON 285 (+/- 5”); RCN 729 (+/- 2”) etc.
- other built-in measuring systems upon request- increased bearing accuracy available as an option!
Subject to change without prior notice!

13

TMI Torque series... with torque-motor (sleeve-shaft motor)

Technical characteristics:
direct-drive technology with high dynamic torque-motors
highest dynamic (up to 0,1 sec. for 90°)very high speeds and therefore new manufacturing possibilities
high precision due to direct measuring systems
backlash freeextremely compact dimensions
6 sizes available
big centre bore
extensive range of accessories available
suitable for a great variety of applications

Our axes consist of:heavy-duty / high-precision axial-radial bearings
integrated spindle-brake (emergency stop option available)high dynamic and wear-free torque-motor
direct measuring systemcompletely sealed and precision-ground housing (square housing only) or flange type housing

14

Employing our TMI series rotary axes with torque-motor
offers you new manufacturing possibilities, due to thehigh speed and dynamic movement. The powertransmission with this technology is free of wear andgives you constant quality of your produced parts forseveral years.

Functional description of a torque-motor

Arranged around the spindle, the torque-motor (sleeve-shaft motor) is designed for the highest possible

TMI series

torque. Optionally these motors can be water-cooled for maximum performance.
.
As this system works without any gear drive, expensive transmission repairs after a collision are now a thing of
the past
A superior performance in rotation speed and dynamics, compared to the gear-driven dividing heads, offers amuch bigger scale of manufacturing possibilities e.g. turning processes or circular grinding.
The measuring system is linked directly with the spindle of the rotary axis and gives the highest positioning
accuracy. Furthermore, there is now NO backlash!
The main bearing is a very rigid, compact and high-precision design. All units have an integrated spindle
clamping system, which enables the unit to take very high manufacturing forces.
The sophisticated overall design gives the units a very compact dimension. A wide range of additional
equipment offers you a modern and integrated concept. Individual solutions for specific requirements arealways possible and realisable.
The rotary axes of the TMI series can be used with almost all modern CNC controls.

15

TMI torque series / built-in type
Main dimensions

TMI series with torque-motor and square housing
sizeA
spindle-ø

B1
spindle bore

B2
depth of bore

B3
through boreC
length of spindle

D
centre high(min.)

E1 x E2 x E3
housing outside
dimensions

CNC 080.2

TMI 28
TMI 55

80 h6
80 h6

35 H6
35 H6

through bore
72 mm

35 mm
28 mm

126 mm
153 mmfrom 50 mm
from 50 mm

150 x128 x 100
100 x100 x 74

CNC 100.2

TMI 28
TMI 55100 h6100 h6

50 H6
50 H6

108 mm
143 mm

30 mm
40 mm *

145 mm
230 mmfrom 65 mm
from 65 mm

130 x 130 x 95
130 x 130 x 95

CNC 125.2

TMI 25
TMI 55
TMI 110125 h6125 h6125 h6

60 H6
60 H6
60 H6

90 mm
105 mm
160 mm

40 mm *
40 mm *
40 mm *

149 mm
215 mm
270 mmfrom 77 mmfrom 77 mmfrom 77 mm

154x 154 x 95
154 x 154 x 95
154 x 154 x 95

CNC 160.2

TMI 55
TMI 110160 h6160 h6

80 H6
80 H6

125 mm
180 mm

40 mm *
40 mm *

235 mm
290 mmfrom 97,5 mmfrom 97,5 mm

195 x 195 x 120
195 x 195 x 120

CNC 220.2

TMI 50
TMI 70
TMI 100
TMI 150220 h6220 h6220 h6220 h6120 H6120 H6120 H6120 H6105 mm
125 mm
155 mm
155 mm

40 mm *
40 mm *
40 mm *
40 mm *

215 mm
235 mm
265 mm
315 mmfrom 125 mmfrom 125 mmfrom 125 mmfrom 125 mm

250 x 250 x 140
250 x 250 x 140
250 x 250 x 140
250 x 250 x 140

CNC 320.2

TMI 50
TMI 70
TMI 100
TMI 150320 h6320 h6320 h6320 h6200 H6200 H6200 H6200 H6

127 mm
147 mm
177 mm
227 mm

40 mm *
40 mm *
40 mm *
40 mm *

225 mm
245 mm
275 mm
325 mmfrom 182,5 mmfrom 182,5 mmfrom 182,5 mmfrom 182,5 mm

365 x 365 x 145
365 x 365 x 145
365 x 365 x 145
365 x 365 x 145* dimension B3 only valid with standard measuring system Heidenhain(Absolute encoder, accuracy +/- 10”)dimension B3 alternatively 16mm
(with option “increased accuracy” e.g. +/- 5” or +/- 2,5”)
dimension B3 alternatively complete through bore, equivalent to B1(Only with option “built-in measuring device”, upon request only, dimension C
may vary)
Subject to change without prior notice!

16

E1

E2

B2

B3
D

E3
C

B1 A

TMI series

Design variations

CNC ... / TMI
1-axis version

CNC ... / TMI / A2
2-axis version

CNC ... / TMI / 2 to 4 spindles
multi-spindle 1-axis version

CNC ... / TMI / 2 to 4 spindles / A2
multi-spindle 2-axis version

17

W
E
N

TMI-FL torque series - flange type... built-in axes with torque-motor (sleeve-shaft motor)

Description
The rotary axis-flange-integral modules type TMI-FL have been designed to easily fit a dividing head into amachine system. Compared to the standard TMI axes, the only difference is the flange-type, round housing. Allinternal parts and therefore also all technical details are completely identical with the standard TMI series.
The housings of the units are made of high grade case-hardened steel or high-tensile aluminium and offer
maximum stability with a very compact design. The housing is precision ground and completely sealed against
coolant and chips. Due to a centring ring and counter bores attached to the housing, the unit can easily be
integrated and mounted into a machine system. The cable outlets and various other connections for example,
the coolant supply are arranged in a way that there will be no interference to the circumference of the unit. This
gives you the possibility to mount the units vertically or axially into the machine system. Multiple units can also
be placed next to each other for multi-spindle machining.
The universal use together with the compact design, the defined interface for the connections in the machine
as well as the exchangeability of the units for service or repair, guarantees the maximum production benefits
from these axes.

18

Mounting examples for rotary tables: TMI-FL torque series - flange type / built-in axes

Main dimensionsA
spindle-ø

B1
spindlebore

B2
depth ofbore

B3*
throughboreClength ofspindleD
length of
housingB4
housing
outside ø

B5ø of centring
devicesize
CNC 125.2

TMI 55-FL
TMI 110-FL

125 h6125 h6

60 H6
60 H6

105 mm
160 mm

40 mm *
40 mm *

215 mm
270 mm

185 mm
240 mmø 196 mm
ø 196 mm

ø 165 g6
ø 165 g6

CNC 160.2

TMI 55-FL
TMI 110-FL

160 h6160 h6

80 H6
80 H6

125 mm
180 mm

40 mm *
40 mm *

235 mm
290 mm

180 mm
235 mmø 248 mm
ø 248 mm

ø 217 g6
ø 217 g6

CNC 220.2

TMI 50-FL
TMI 70-FL
TMI 100-FL
TMI 150-FL

220 h6220 h6220 h6220 h6120 H6120 H6120 H6120 H6105 mm
125 mm
155 mm
155 mm

40 mm *
40 mm *
40 mm *
40 mm *

215 mm
235 mm
265 mm
315 mm

170 mm
190 mm
220 mm
270 mmø 288 mm
ø 288 mm
ø 288 mm
ø 288 mm

ø 256 g6
ø 256 g6
ø 256 g6
ø 256 g6

CNC 320.2

TMI 50-FL
TMI 70-FL
TMI 100-FL
TMI 150-FL

320 h6320 h6320 h6320 h6200 H6200 H6200 H6200 H6

127 mm
147 mm
177 mm
227 mm

40 mm *
40 mm *
40 mm *
40 mm *

225 mm
245 mm
275 mm
325 mm

148 mm
168 mm
198 mm
248 mmø 410 mm
ø 410 mm
ø 410 mm
ø 410 mm

ø 365 g6
ø 365 g6
ø 365 g6
ø 365 g6

* dimension B3 only valid with standard measuring system Heidenhain(Absolute encoder, accuracy +/- 10”)

B4

B2

A

B3

B5

dimension B3 alternatively complete through bore, equivalent to B1(only with option “built-in measuring device”, upon request only, dimension
C may vary)B1dimension B3 alternatively 16mm
(with option “increased accuracy” ; e.g. +/- 5” or +/- 2,5”)D

Subject to change without prior notice!

C

19

TMI series

TMI-FL Torque series with torque-motor / flange type / built-in axes

TMI torque series
Speed, clamping force .....

Technical details are valid for TMI built-up and built-in versions (flange version) !
nominal torquepeak torque(saturation region)

nominal / peakcurrent (Aeff)

max. rpm *(if InK is cooled)size

clamping force **tilting moment(clamping system)(main bearing)

CNC 080.2

TMI 28
TMI 55

4 Nm
8 Nm

12 Nm
24 Nm

1,3 / 4,8 Aeff
2,6 / 8,1 Aeff

1200 min-1 *1200 min-1 *ca. 30 Nm
ca. 30 Nm

60 Nm
60 Nm

CNC 100.2

TMI 28
TMI 28-HS
TMI 55
TMI 55-HS

8 Nm
8 Nm
16 Nm
16 Nm

16 Nm
24 Nm
37 Nm
37 Nm

2,1 / 4,5 Aeff
6,5 / 24 Aeff
4,3 / 11 Aeff
15 / 37 Aeff

1200 min-1 *2000...4000 min-1 *1200 min-1 *2000...4000 min-1 *ca. 150 Nm
ca. 150 Nm
ca. 150 Nm
ca. 150 Nm

140 Nm
140 Nm
140 Nm
140 Nm

CNC 125.2

TMI 55
TMI 110

24 Nm
50 Nm

43 Nm
86 Nm

11 / 17 Aeff
11 / 17 Aeff

800 min-1 *800 min-1 *ca. 250 Nm
ca. 250 Nm

400 Nm
400 Nm

CNC 160.2

TMI 55
TMI 11048 Nm
103 Nm

74 Nm
148 Nm

9 / 15 Aeff
9 / 12 Aeff

600 min-1 *430 min-1 *ca. 500 Nm
ca. 500 Nm

800 Nm800 Nm

CNC 220.2

TMI 50
TMI 70
TMI 100
TMI 150

113 Nm142 Nm
231 Nm338 Nm

179 Nm
251 Nm358 Nm537 Nm5,6 / 9,5 Aeff
13 / 26 Aeff
8 / 13 Aeff
15 / 26 Aeff

140 min-1 *430 min-1 *82 min-1 *150 min-1 *ca. 1200 Nm
ca. 1200 Nm
ca. 1200 Nm
ca. 1200 Nm

2000 Nm
2000 Nm
2000 Nm
2000 Nm

CNC 320.2

TMI 50
TMI 70
TMI 100
TMI 150

241 Nm344 Nm
484 Nm744 Nm439 Nm614 Nm878 Nm1320 Nm

9 / 18 Aeff
10 / 20 Aeff
16 / 32 Aeff
18 / 36 Aeff

130 min-1 *96 min-1 *120 min-1 *78 min-1 *ca. 3500 Nm
ca. 3500 Nm
ca. 3500 Nm
ca. 3500 Nm

3500 Nm
3500 Nm
3500 Nm
3500 Nm* higher rpm upon request** pneumatic emergency stop clamping system upon request
Subject to change without prior notice!

20

Accuracies

Technical details are valid for TMI built-up and built-in versions (flange version)!
axial run out

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 10,0”

CNC 125.2

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 2,5”

CNC 160.2

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm

Standard
Option 1
Option 2+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm+/- 0,0030 mm+/- 0,0015 mm+/- 0,0010 mm

CNC 080.2

CNC 100.2

CNC 220.2

CNC 320.2

indexing accuracy *in arc sec.

TMI series

radial run out
size

upon request+/- 5,0”

upon request+/- 10,0”+/- 5,0”+/- 2,5”+/- 2,0”+/- 1,0”* the given accuracies are only valid with the respective measuring device (encoder) !
Subject to change without prior notice!

21

Peripheral devices / additional equipment
work-holding devices and systems - overview

Collets (manual or automatic):collet types:

EX 16, EX 32, EX 40
ER 16, ER 32, ER 40

deadlength collets:

F30, 162 E, 173 E, 185 E, 386 E

draw-back collets:

W20, W25, B32, Hainbuch Spanntop etc.

Jaw-chucks (manual or automatic):
Röhm
SchunkForkardt
Schrenk
SoMatec

SK-taper (manual or automatic):
SK 30, SK 40 (also with KK5 centring), SK 50 (also with KK6 centring)=> according to DIN 2080 or DIN 69871
MK-taper (manual or automatic):
MK 1 ... MK 6

22

Pallet clamping-systems (manual or automatic):
EROWA
System 3R
MECATOOL
Hirschmannetc.

HSK (manual or automatic):
HSK 32
HSK 50
HSK 63
HSK 100=> according to DIN 69893

Peripherie / Zubehör... Das passende Spannmittel / Spannsystem

Zero-point work-holding systems (manual or automatic):
Schunk NSE
Lang Quick-Point
Vischer & Bolli

Faceplates with T-slots (according to customer´s requirements):
Equipmentwith 4, 6 or 8 slots are available
from min. ø100mm to max. ø630mm are available

Hydraulic expansion chucks (manual):ø 35 H6
ø 60 H6
with radial application of force
true-runout better than 0,003 mm at the inner ø of the chuck23

Direct measuring systems
Type Heidenhain
RON 2xx, RON 7xx, RON 8xx
RCN 2xx, RCN5xx, RCN7xx, RCN 8xx
ERN 1xx, ECN 1xx
ERA 4xx etc.

Rotary feed-through- for hydraulic or pneumatic connections- for dividing head or counter bearing- for 2 to 9 leads

Peripheral devices / additional equipment... around the dividing headBase-plates- also in connection with intermediate plates / blocks for the required centre height- for horizontal and vertical use- centre height and design according to customers requirements(also adapted for special machines)

Counter bearings- with or without hydraulic clamping device- also available in connection with multi-lead rotary feed-through for various medias- centre height according to customers requirements

Tailstocks- manual, hydraulic or pneumatic operated- with centres MT 2 or MT 3
- travel 25, 40 or 60mm
- centre height according to customers requirements

24

Specials
for special requirements

Corrosion protected dividing heads and rotary axes
(chemical nickel plated)- all outside parts are corrosion protected by a 5 micron thick nickel coating

Non-corroding dividing heads and rotary axes (INOX)- all outside parts are made from stainless steel
Equipment- primary seals are made from hard-wearing VITON material

Completely sealed dividing heads and rotary axes (IP 68)- all outside parts are made from stainless steel- primary seals are made from hard-wearing VITON material- for use on EDM machines etc.
... much more on request - according to customers requirement!

25

Control systems and electrics
operation with a separate dividing head control system andM-function

Our control system type HOWIPOS 1/AC is a modern Microprocessor CNC-positioning control. Positioning
controller, control system and operating panel are all mounted in a compact console. The control is easy andcomfortable to use with and easy, menu-guided programming system. The illuminated LCD-display shows
all input data and indicators in clear text. A special program has been developed for the use of the HOWIPOS
control with rotary-tables and dividing heads. The control system is mounted in a table-top housing andconnected with the dividing head - ready to use. The activation of the control system, by means of an Msignal from the machine is already prepared.

Technical details

26

HOWIPOS

1-axis controller

2-axes controller

type

CPS 20

CPS 300

display

2-lines

4-lines

keyboard

plastic-foil keyboard

plastic-foil keyboard

number of programs to be stored

90

90

number of inputs

8

16

number of outputs

616

Input resolution

0,001 °

0,001 °

number of amplifiers

1

2

number of motors

1

2cable length (standard)

5m

5m

Control by means of the machine tool controller e.g. 4th or
4th / 5th axis of a machine tool control system

Servomotor according to customer requirements, to suit customers
own control system(Not valid for TMI type units!)
The motor of all popular motor-manufacturers are suitable to be built
on to our units e.g.

Equipment- Siemens
FT and FK series- Fanucalpha and beta series- Heidenhain
QSY series- Infranor
BLS and HDD series- Bosch
MAC, MDD, MKD, MSK, SE, SF and SG series- Yaskawa
SGM series etc.
and others (please specify)

Appropriate drive packages to suit machine control system- required servo motor(as shown above - not for TMI series)- plug-in cable-set up to the defined interface(Cable length approx. 5 m including protective tube, PG 29)- mating connector (alternatively flying leads)- including motor cover (stainless steel)27

Sample applications
HOWIMAT gear type seriesmachine type: CHIRON FZ 15 high-speed(vertical machining centre with separate
loading and machining area)
process:

5-face machining of various components

dividing head: CNC 160/160.2/A2 (4th and 5th axis)- including Vischer & Bolli Dock Locksystem 3to for different fixtures- including rotary-distributor with 2 outlets forrotary axis
- including clamping system for the counterbearing (750 Nm)

machine type: DECKEL-MAHO DMP 60V(vertical machining centre with separate
loading and machining area)
process:

5-face machining of various components(serial parts, 2 pieces in one setting)dividing head: CNC 160/160.2/A2 (4th and 5th axis)- including rotary-distributor with 2 outlets
for rotary and tilting axis
- including clamping system for the counterbearing (750 Nm)

28machine type: HELLER MC 25(horizontal machining centre with
X = 800mm)
process:

drilling and milling application on cylinder
heads

dividing head: CNC 220.2/K (4th axis)- centre height 250mm, with baseplate 290mm- including rotary distributor with 4 outlets- including swivelling-bridge, clearance 570mm- including clamping system for the counterbearing (900 Nm)- including direct measuring system

machine type: HELLER MC 25(horizontal machining centre with
X = 800mm)
process:

drilling and milling application on steering
Box including 3-dimensional drilling appl.

dividing head: CNC 160.2/Z2-A400 (4th axis)- 2-spindle dividing head with spindle
distance 400mm- including 2 swivelling-bridges, clearance
760mm- including clamping system for the counterbearing- including 2 quick-change clamping systems- including automatic loadingmachine type: HELLER MC 16(horizontal machining centre X = 630mm)
drilling and milling application on cylinder
housing

dividing head: CNC 220.2/Z (4th axis)- centre height 210mm, with baseplate 250mm- including rotary distributor with 3 outlets- including swivelling-bridge, clearance 350mm- including clamping system for the counterbearing (900 Nm)- including direct measuring system

29

Examplesprocess:machine type: CHIRON FZ 08 KS Magnum(compact vertical machining centre with
X=450mm and Y=270mm)
process:

5-face machining (2 work-pieces withapprox. 200x 40x 100mm)

dividing head: CNC 160/2Sp125.2-A230 (4th and 5th axis)- twin-spindle tiltable dividing head
- lowered rotary axis
- spindle distance 230mm- fixture diameter 229mm- including 2 rotary distributors with 2 outlets
for rotating and tilting axis
- without spindle clamping system

Sample applications
HOWIMAT gear type seriesmachine type: CHIRON FZ 08 KS(compact vertical machining centre with
X=300mm and Y=250mm)
process:

5-face machining including 3-dimensional
drilling application
Milling and turning operations!

dividing head: CNC 160/80.2/A2/HS (4th and 5th axis)- gear reduction switchable fromI = 30 for milling operation toI = 1,5 for turning operations- including automatic collet-chuck forW20 collets- including direct measuring system for rotatingmachine type: CHIRON DL 18 KL(twin-spindle vertical machining centre)
process:

5-face machining for various parts up to
diameter 180mm

dividing head: CNC 220/4Sp160.2-A200 (4th and 5th axis)- 4-spindle tiltable dividing head- spindle distance 200mm- spindle bare 80mm
- lowered rotating axis
- including counter bearing clamping system
1.250 Nm30

machine type: CHIRON FZ 18 L 2000
(vertical machining centre for twin-tablemachining)process:

drilling and milling operations withmulti-piece fixtures

dividing head: CNC 160.2/Z (4th axis)- centre height 215mm- including fixture plate 700x 350x 50mm
- swivelling base plate with clearance
640mm- including hydraulic rotary distributor for
2 outlets- 1 unit left hand and 1 unit right hand design

machine type: FANUC 0iC (wire-cut EDM machine withrobot loading system)
process:

EDM machining of PKD-tools up to300mm length

dividing head: CNC 125.2/K-NIRO (4th axis)- non-corroding dividing head- sealing according to IP 68- automatic HSK-63 clamping system- suitable for robot loading- true surface runout < 0,001mm- including direct measuring system

machine type: SODICK MC 430 L(compact HSC-machining centre)
process:

5-axis machining of various components(mould and die production)

Examplesdividing head: CNC 125.2/K-80.2/K/A2 (4th and 5th axis)- tiltable 2 axes dividing head
- including face plate 45mm
- with lowered rotating axis
- rotating distributor with 2 outlets forautomatic chuck EROWA IST 100- all connections of the rotary axis are leadthrough the tilting axis

31

machine type: SPINNER VC 1460
(vertical machining centre with cross table)
process:

machining en the circumference of aembossing roller

dividing head: CNC 220.2/TMI100 (4th axis)- direct drive technology- centre height 220mm- including sensor-module-external box(SME 125) for torque motor EnDat and
DRIVE CLiQ interface- including pressure booster- including stainless steel cover and plug-in
wiringSample applications
TMI torque seriesmachine type: SAUER LASERTEC DML 80(laser machining centre)
process:

5-face laser machining (laser drilling) of
Cooling holes in turbine blades

dividing head: CNC 320.2/TMI50-160.2/TMI55/A2(4th and 5th axis)- direct drive technology- rotary axis 78mm below centre height(375mm)- including rotary distributor with 2 outlets
on rotating axis
- including pallet system for MECATOOL
GPS 240

machine type: KERN Pyramid Nano(high accuracy CNC milling centre)
process:

5-face manufacturing (milling and drilling)of various work-pieces

dividing head: CNC 125.2/TMI110-125.2/TMI55/A2(4th and 5th axis)- direct drive technology- rotary axis 15mm below centre height(200mm)- increased axial / radial runout +/- 0,0010mm- including rotary distributor with 2 outlets on
rotary axis
32

machine type: MÄGERLE MFP 50
process:

grinding of turbine blades

dividing head: CNC 220.2/TMI150-220.2/TMI150/A2160.2/TMI55(4th, 5th and additional 6th axis)- direct drive technology on all axes
- complete energy supply feed through bothrotating and the tilting axis
- including clamping system EROWA 029436- including hydraulic clamping system andemergency stop clamping system- hydraulic clamping system on the counterbearing

machine type: EWAG EWAMATIC LINE
process:

grinding and eroding of PKD-tools up to300mm lengththdividing head: CNC 125.2/TMI55 (4 axis)- direct drive technology- speed up to 800 rpm- 90° in 0,1 second- including automatic HSK 63 clamping
system- true surface runout < 0,0005mm- suitable for robot loadingmachine type: CINCINNATI CFVi 550 - 30 Tools(vertical machining centre)
5-face machining of various components up
to dia. 350 mm

dividing head: CNC 220.2/TMI150-220.2/TMI50/A2(4th and 5th axis)- direct drive technology- 90° in 0,15 seconds- spindle bore of rotating axis dia.
120mm / 43mm
- tilting axis range +93° to -3°- counter bearing clamping system 1.250 Nm

33

Examplesprocess:Our references
Certificate of competence and successProfit from our range of services
The reputation we have established with our high-class products commits us to the best possible service
towards our customers. We offer you a reliable and high precision system component for your machine withthe best possible material characteristics. The combination of excellent engineering and constantimprovement of the technologies gives Detlev Hofmann GmbH the leading position in the manufacturing of
CNC dividing heads and rotary axes. Even with difficult, customer-individual solutions we constantly prove ourcompetence in this field.
Our excellent understanding of the developments and requirements in the market enables us to develop new
exciting markets, in addition those already in existence. The big variety of applications for our units makes us
unique in the market. Due to our long-standing experience in a wide scope of applications such as milling,turning, drilling, grinding, eroding, engraving, measuring and testing as well as laser techniques, means we
can offer you the widest variety of products and services. This includes the clarification of all technical details
and requirements, the development, manufacturing an assembly of our units and if requested, also the initialinstallation and start-up operation of our axes, which can include training of the operators. We guarantee areliable and fast after-sales service and support.
Therefore our references are a testimonial of competence and success and are also a confirmation of the trustthat our customers show towards us and our range of products.

34

Our references
For more than 25 years we have been a supplier to the machine tool and tool-making industry, the mould and die
sector as well as the automotive and aerospace industries. In addition we supply the jewellery and dental
industry with our reliable and innovative products.
Together with our strong partners within the machine-tool sector we set new standards in the area of 5-facemanufacturing which offers higher efficiency and productivity within the manufacturing process.
We will work with all our clients to find the optimum solution to meet all their needs.

References

Kern Micro- und FeinwerktechnikGmbH & Co. KG

35

09/2010
Subject to change without prior notice!

Detlev Hofmann GmbHYour partner:

Präzisions-Maschinenbau / CNC-Teilapparate
Rastatter Strasse 36 / D-75179 Pforzheim
Tel: +49 (0) 7231 / 142 97-0
Fax: +49 (0) 7231 / 142 97-29
www.detlevhofmann.de
info@detlevhofmann.de

Karlsruhe
A8
A8

B1

Stuttgart

motorway exit
Pforzheim West
0

Ka
rl

sru
h

er

Str
aß
e

Industrial area
“Wilferdinger Höhe”

B 10

St
ut
tg
a

rte
r

St
ra

ße
Detlev Hofmann GmbH

Rastatter Straße