Product range

timing belts

Siegling – total belting solutions

timing belts
In modern power-transmission and handling technology,
timing belts are versatile components for positioning, conveying,synchronising, interval conveying and singling.

As form-fit power-transmission and conveying components, Siegling Proposition
timing belts complement the established family of Siegling Transilon conveying
and processing belts. Our vast experience in light materials handling guarantees
superb product quality, in-depth support and fast service.
Siegling Proposition high-efficiency timing belts are made of high-quality poly­
urethane with an embedded tension member made of steel cord or Kevlar.
Thanks to their low mass and extreme tensile strength, they are quiet to operate
and require virtually no maintenance. These characteristics make them ideal for
demanding tasks like accelerating and braking, as well as for exact positioning.
A wide range of coatings, patterns and profiles can be applied to standard timing
belts. They can be modified even further by adding perforations, milling andgrinding. As a result, the belts are true specialists when dealing with conveying,power-transmission or handling jobs.

Product design (standard) Siegling Proposition
Material:
Hardness:
Tension member:
Colour:Permissible operating
temperature:polyurethane elastomer
92° Shore A
galvanised steel cord or Kevlar
pearl white–5/+80 °C
2

Contents
Siegling Proposition
applications

4Standard product range

6

Cams and profiles

9

Coatings and coverings

10

Customised products

12

Accessories
Endless splices

3

The properties

The advantages		

wear-resistantlong belt life

maintenance-free

no maintenance costs

good tracking properties

reliable, gentle operation

low noisesafe working conditions

flexible		small reversing diameters,
high counter-bending strength

saves roomcompact machine designs possible

14

Siegling Proposition applications

Linear­ drives

Automation andhandling technology

Thanks to form-fit transmission and narrow
fabrication tolerances, Siegling Proposition timing
belts guarantee isogonic rotations and highrepeat accuracy in linear drives. ATL timing belts areespecially good at meeting these challenges.

In automation and handling technology,
Siegling Proposition timing belts are often usedin place of chains and other systems which
require complex designs.

Siegling Proposition on the power test rig.

Siegling Proposition belts in a packaging machine.

4Siegling – total belting solutions

Lifting devices, portal robots androll-up door drives

Synchronous operation

In lifting devices, portal robots and roll-up
door drives, Siegling Proposition timing
belts transmit large forces while providing ahigh degree of positio­ning accuracy.

As conveyor belts running synchronously in sets, they guaranteethat the goods being conveyed remain in position. Cams, coatingsand coverings make it possible to customise the belts precisely forthe goods being conveyed and the conveying task.

Siegling Proposition timing belts in thevertical axis of an industrial robot.

Conveying of car windows by belts running synchronously. The coverings on
the reverse face of the timing belts treat the goods gently and improve the grip.

5

~ 32
–
~ 38

~ 15
–
~ 19

~ 32
–
–

1.2
2.2

10, 12, 16, 20,
25, 32, 50, 75,
100

12

19

2.8
–
–

50
–
–

–
–
–

–
–
–

~ 75
–
–

2.5

10, 12, 16, 20,
25, 32, 40, 50,
75, 100

12

38

4.8
–
4.0

60
–
50

~ 85
–
~ 70

~ 42
–
~ 34

~ 77
–
–

16, 25, 32, 50,
75, 100

12

38

6.4
–
–

90
–
–

–
–
–

–
–
–

~ 141
–
–

8

15

96

5

16, 20, 25, 32,
50, 75, 100

7.7
–
6.4

90
–
80

~ 134
–
~ 114

~ 67
–
~ 57

~ 159
–
–

8

16, 20, 25, 32,
50, 75, 100

12

76

5

7.2
–
–

90
–
–

–
–
–

–
–
–

~ 140
–
–

8

16, 20, 25, 32,
50, 75, 100

22

140

8.6
–
–

120
–
–

–
–
–

–
–
–

~ 289
–
–

10, 12, 16, 20,
25, 32, 50, 75,
100

12

19

3.0
–
–

50
–
–

~ 70
–
–

~ 35
–
–

~ 76
–
–

12, 16, 20, 25,
32, 50, 75, 100,
150

15

48

6.4
–
–

90
–
–

~ 155
–
–

~ 77
–
–

~ 152
–
–

10, 12, 16, 20,
25, 32, 50, 75,
100

14

45

6.4
–
–

90
–
–

~ 124
–
–

~ 62
–
–

~ 128
–
–

10, 12, 16, 20,
25, 32, 50, 75,
100

25

80

6.8
–
–

120
–
–

~ 284
–
–

~ 75
–
–

~ 286
–
–

AT 10 L10

Width [mm]2.7

AT 10 E

10

1.2

AT 10

10

4.5

5

4.5

AT 5

2.5

20

2.5

T 20 L20

4.5

T 20 E

20

2.5

T 20

4.5

T 10 LE

10

2.5

T 10

10

4.5

T5L

5

*
For detailed technicalinformation visit
www.forbo-siegling.com

truly endless

25
–
30

weldedendless

2.4
–
2.0

open

16

dmin approx. [mm]tensioning roller
on toothed facedmin approx. [mm]

10

5

5

Weight, approx.
[kg/m2] **Zmin minimum number of teeth

1.2
2.2

6, 8, 10, 12, 16,
20, 25, 32, 50,
75, 100

Standard product range

T5

Fperm approx.
[N/mm width]**Steel–
KevlarSteel–
KevlarSteel–
KevlarSteel–
KevlarSteel––

Width tolerance generally between ± 0.5 and ± 1.0 mm.
You can find the exact figure for each belt width on the Internet.

**	Median figures, rounded
You can find the exact figure for each belt width on the Internet.
The figures stated are based on 20/50 ambient conditions.

6

~ 136
–
–

~ 290
–
–

8
5

25, 32, 50, 75,
100, 150

22

140

11.1
–
–

170
–
–

~ 337
–
–

–
–
–

~ 320
–
–

6,4, 7,9, 9,5,
12,7, 19,1, 25,4

10

16

–
–
1.8

–
–
25

–
–
~ 39

–
–
~ 20

–
–
–

9,5, 12,7, 19,1,
25,4, 38,1, 50,8,
76,2, 101,6

12

36

3.9
–
3.2

60
–
55

~ 86
–
~ 65

~ 43
–
~ 33

–
–
–



12,7, 19,1, 25,4,
38,1, 50,8, 76,2,
101,6

14

56

4.5
–
3.5

60
–
55

~ 85
–
~ 65

~ 42
–
~ 32

~ 79
–
–



12,7, 19,1, 25,4,
38,1, 50,8, 76,2,
101,6

12

49

5.2
–
–

90
–
–

–
–
–

–
–
–

~ 138
–
–



12,7, 19,1, 25,4,
38,1, 50,8, 76,2,
101,6

15

61

5.5
–
–

90
–
–

–
–
–

–
–
–

~ 155
–
–



25,4, 50,8,
76,2, 101,6

18

127

1.0
–
–

150
–
–

~ 132
–
–

~ 66
–
–

–
–
–

3.7

10, 12, 15, 20,
25, 32, 50, 75,
100

13

21

4.8
–
–

50
–
–

~ 72
–
–

~ 33
–
–

~ 76
–
–

5.6

10, 15, 20, 25,
30, 50, 85, 100

18

46

6.9
–
–

90
–
–

~ 147
–
–

~ 74
–
–

~ 155
–
–

5.6

20, 25, 30,
50, 85, 100

16

41

6.5
–
–

90
–
–

–
–
–

–
–
–

~ 140
–
–

H



HLE



HL



3.6

9.525

1.85

L







XL



AT 20 L




20



HTD 8 M8

HTD 8 ME8

3.6

HTD 5 M

3.6

5

2.2



XH

Continued on the next page

For detailed technicalinformation visit
www.forbo-siegling.com

7

truly endless

~ 273
–
–

weldedendless

120
–
–

open

10
–
–

dmin approx. [mm]tensioning roller
on toothed facedmin approx. [mm]115

Weight, approx.
[kg/m2] **Zmin minimum number of teeth
18

Width [mm]8516, 25, 32, 50,
75, 100, 150

20

AT 20

Fperm approx.
[N/mm width]**Steel–
KevlarSteel–
KevlarSteel–
KevlarSteel–
KevlarSteel––~ 296
–
–

~ 148
–
–

~ 289
–
–

10

55, 85,
115, 150

34

152

12
–
–

170
–
–

~ 347
–
–

–
–
–

–
–
–

10

HTD 14 MLL

1455, 85,
115, 150

38

170

13.5
–
–

180
–
–

~ 447
–
–

–
–
–

–
–
–

15, 20, 25,
30, 50, 85

18

46

6.4
–
–

90
–
–

~ 153
–
–

~ 84
–
–

–
–
–

Width [mm]
6.43
6.43

8

3.2

RPP 8 M

6.43

HTD 14 ML

14

truly endless

120
–
–

weldedendless

11
–
–

open

111

dmin approx. [mm]tensioning roller
on toothed facedmin approx. [mm]

25

5.4

HTD 14 M

Weight, approx.
[kg/m2] **Zmin minimum number of teeth

1025, 40, 55,
85, 115

Standard product range
14

Fperm approx.
[N/mm width]**Steel–
KevlarSteel–
KevlarSteel–
KevlarSteel–
KevlarSteel––

Width max. [mm]*Zmin minimum number of teeth

dmin approx. [mm]Weight, approx. [kg/m2]

dmin approx. [mm] tensioning
roller on toothed face

Fperm approx.
[N/mm]**

Min. length
made [mm]2.5*
For detailed technicalinformation visit
www.forbo-siegling.com

KevlarKevlarKevlar

150

450

14

45

3.9

80

12.5

1100

152.4

457.2

14

56.64

3.3

80

12.5

1104.9

4.5


WH



Kevlarendless welded
belts



WT 10

10

Width min. [mm]*Standard wide timing belt range

Width tolerance generally between ± 0.5 and ± 1.0 mm.
You can find the exact figure for each belt width on the Internet.

**	Median figures, rounded
You can find the exact figure for each belt width on the Internet.
The figures stated are based on 20/50 ambient conditions.
		8

Cams and profiles
For conveying and many more specialised tasks in material handling (interval
conveying, singling, positioning), cams and profiles pave the way for innovative
design solutions. In addition to a number of standard cams from half-finishedproducts, any special shapes can be made as injection moulded parts.

Welded cams

Screwed-on cams

Cams are usually made of polyurethane –as are the timing belts themselves,
ensuring the reliability of the weld between the cam and the reverse face ofthe timing belt. The welding of cams
onto a timing belt affects its flexibility.
The smallest possible cam thickness (t)should be selected. If possible, cams
should be attached “opposite teeth”.

Cams that are screwed on are particularly
flexible to use. The original teeth on thebelts are removed and replaced withbrass teeth with threads. Brass teeth areavailable in T10/ AT10, T20, AT20 and XH
tooth shapes. (Standard widths: 25/32/50;
further widths on request).

For detailed technicalinformation visit
www.forbo-siegling.com

9

25
20
20
30
25
30
25
25
25
20
30
20
25
25
10
10
20
10
15
15
20
25
20
40
25
50
25

- 20/110- 40/70- 40/70- 20/80- 20/80- 20/80- 20/100- 20/70- 15/90- 15/90- 10/80- 10/80- 10/80- 15/80- 40/70- 40/70- 10/70- 30/70- 30/70- 30/70- 30/70- 30/70- 30/80- 10/120- 10/120- 60/220- 10/120

28 PA fabric (Polyamide fabric)
29 EPDM
30 Correx
31 NBR/FSTR (Elastomer)
32 PTFE (Teflon)
33 Viton
34 PU 85/FSTR (UU 20U NA FSTR/FSTR)
35 PU 85/NSTR (UU 20U)
36 PU 85/NP (UU 20U NA FSTR/NP)
37 R 60 (UR 40U)
38 PU 85-HC+ (UU 20U-HC+ FSTR/FSTR)

green
black
beige
green
grey
black
white
black
blue
blue
black

Fabric, Polyamide
Synthetic rubber (EPDM)
Natural rubber
Nitrile rubber (NBR)
Polytetrafluoroethylene (PTFE)
Fluoric rubber (FKM mix)
Polyurethane (thermoplastic)
Polyurethane (thermoplastic)
Polyurethane (thermoplastic)
Thermoplastic high grip elastomer
Polyurethane (thermoplastic)

–
70
40
65
–
70
85
85
85
60
85

0.5
2 – 10
4 – 10
1
0.3
1–5
1
1
1.4
1.3
1.1

60
25
20
25
300
25
10
10
10
20
10

- 20/50- 40/100- 20/80- 20/70- 200/260- 10/275- 20/60- 20/60- 20/60- 20/60- 20/60

Pharmaceutical industry

Permissible operating
temperature [°C]

3 – 12
3 – 12
3 – 12
2–4
2–4
2–4
3.2
3.5
1–2
1–3
3
2.5
3
4.5
5 – 15
10 – 20
2 – 10
6 – 12
6 – 12
6 – 12
6 – 12
6 – 12
2 – 101.2
2.5
1 – 10
2–3

Vertical form, fill, seal belts
for bagger machinesd-factor*

55
40
40
85
60
85
60
60
65
40
65
65
65
50
165 kg/m3
250 kg/m3
55
160 kg/m3
220 kg/m3
300 kg/m3
400 kg/m3
500 kg/m3
400 kg/m3––
35–

Food packaging

Coating thickness [mm]Nitrile rubber (NBR)
Natural Rubber
Natural Rubber
Polyurethane (thermoplastic)
Polyurethane (thermoplastic)
Polyurethane (thermoplastic)
Nitrile rubber (NBR)
Nitrile rubber (NBR)
PVC
PVC
PVC
PVC
PVC
PVC
Cellular rubber
Cellular rubber
Polyurethane (thermoplastic)
Polyurethane foam
Polyurethane foam
Polyurethane foam
Polyurethane foam
Polyurethane foam
Polyurethane foam
Polyester felt
Polyester felt
Silicone
Chrome leather

not to generic fats and oils

Hardness [Shore A]/Density

orangeredwhitetransp.
transp.
transp.
green
black
white
petrol
white
white
white
white
black
orangeyellowyellow
blue
green
brown
red
beige
black
white
white
grey

to acids, salts & bases

Coating material

1 Linatrile
2 Linatex
3 Linagard FG
4 PU 85 (U20)
5 PU 60 (PU foil 60)
6 PU 85/LG (U 20/LG; PU foil LG)
7 NBR/NSTR (G/GSTR)
8 NBR/AR (G/AR; Supergrip)
9 PVC 65 (V/20; PVC)
10 PVC 40 (PVC)
11 PVC 65/FG (V/20/FG; FG)
12 PVC 65/Pimple (Pimple top)
13 PVC 65/Saw (Saw profile)
14 PVC 50/AR (PVC/AR; Supergrip)
15 Porol (SZ/Porol)
16 Sponge rubber (SO)17 PU 55 (PU)18 Sylomer-G (Sylomer)
19 Sylomer-R (Sylomer)
20 Sylomer-L (Sylomer)
21 Sylomer-M (Sylomer)
22 Sylomer-P (Sylomer)
23 Vulcocell (Vulcocell VS40MH)
24 NOVO-HC (Novo 12 HC)
25 NOVO (Novo 25 NA)
26 Silicone
27 Leather (Chrome leather)

Coatings

to generic fats & oils

ColourResistance**

New Name (old Name)

Various coatings can be applied to all standard
Siegling Proposition types.

– protect the surface of sensitive goods (glass,furniture)– are largely unaffected by rough goods or
goods with sharp edges thanks to theirtenacity (sheet metal, wood).

●
●
●
●

●
●
●
●
●
●

●
●
●
●
●

●
●
●
●
●
●
●
●
●
●
●
●
●

●
●

●
●
●
●
●
●
●
●
●
●
●

●

●

●

●

●
●

●
●

2

3

Other coverings and coatings for the reverse face,varying in material and texture considerably,– conform to FDA regulations (processing of
food)

●
●

1

On the toothed and/or reverse face, coverings ofpolyamid fabric reduce the drag. This facilitates
the intermeshing of the teeth, in turn reducing
the noise.

– increase the drag, thereby improving the grip
properties (pick-off belts, inclined conveyors)

●
●
●
●
●
●
●
●

4

5

PAZ/PAR: polyamide fabric (on both faces)
PAZ: polyamide fabric (toothed face)
Characteristic/application:
low drag, protects against wear,
reduces noise
For the types PAZ and PAZ/PAR the polyamide fabric is applied during the produc­tion of the timing belt. Therefore their sizes
correspond to those of the standard types.

6

7

8

10

●
●
●
●
●

●
●
●
●

●
●
●
●

●
●
●
●

Temperature range limited
by PU timing belt material

Good release properties

Conveying of
hot and sticky goods

●
●
●
●

●

Conveying ofabrasive goods

Conveying ofsensitive goods

General conveying

Feeder & haul-off belts

Metal parts conveying

Paper/Cardboard
conveying

Properties

Wood conveying

Solar-panel industry

Glass conveying

Bottle inspection lines

Applications

●

●

●
●

●
●
●

●

●
●

●

●
●
●
●

●
●
●

●
●

●
●

●

●

●

●
●

●

●
●
●
●
●
●

●
●
●

●
●
●

●

●

●
●

●

●

●

●
●

●
●

●
●
●
●
●

9
10

11

12

●
●

●
●

●
●

●
●
●
●

●
●
●
●
●
●

17

25

18

26

19

27

20

28

High elasticity. Constantly high friction.
Abrasion resistent even in wet conditions. High elasticity. Constantly high friction.
Abrasion resistent even in wet conditions. High elasticity. Constantly high friction.
High chemical resistance. Excellent cut and wear resistance.
High chemical resistance in general.
High chemical and abrasion resistance in general.
High abrasion and cut resistance. Fuel and oil resistant.
Supergrip profile for incline conveying. Fuel and oil resistant.
Smooth surface, good cleanability. Food grade.
Smooth surface, high friction.
Food grade. Special herringbone profile.
Special pimple top profile.
Special saw tooth profile.
Supergrip profile for incline conveying.
Excellent cushioning and confirming to products. Cell structure closed.
Excellent cushioning and confirming to products. Cell structure open.
High chemical resistance in general.
Excellent cushioning and confirming to products. Cell structure open.
Excellent cushioning and confirming to products. Cell structure open.
Excellent cushioning and confirming to products. Cell structure open.
Good cushioning and confirming to products. Cell structure open.
Cell structure open.
Excellent cushioning and confirming to products. Cell structure open.
Non-marking. High conductive coating. Low friction, accumulation possible.
Non-marking. Low friction, accumulation possible.
Excellent release properties and cleanbility. High friction.
Highly resistant to oil and fuel. Excellent cut and wear resistance.
Suitable for gentle conveying of sensitive goods, accumulation possible.
Low friction, accumulation possible. Good abrasion resistance.
Excellent abrasion and cut resistance.
Natural rubber. High friction and abrasion restistant.
Excellent cut and wear resistance.
Excellent release properties and cleanability. Low friction, accumulation possible.
Excellent chemical and heat resistance.
High chemical resistance. Excellent cut and wear resistance.
High chemical resistance. Excellent cut and wear resistance.
High chemical resistance. Excellent cut and wear resistance.
High chemical resistance. Excellent cut and wear resistance.
High chemical resistance. Excellent cut and wear resistance.

*	Factor x belt thickness = smallest diameter(approx. value)** 	If uncertain, please contact Forbo Siegling

33

34

29

13

21

14
22

35
30

36

15
23

31

37

24

32

38

16

11

Customised products
By modifying timing belts with and without coatings or coverings afterwards, it ispossible to tailor them exactly to meet the needs of individual applications inmaterials handling. Because of the wide array of possibilities and combinations, we
can show you here just a very small selection. Please contact your Forbo Siegling
partner regarding any specific require­ments you may have.

Mechanical processing

Special coatings and coverings

Almost any shape can be milled, groundor punch-cut into timing belts and coatings or coverings with very narrow tolerances. CNC-powered machines and water
jets are used.

It is possible to apply an extra coveringof PA fabric afterwards ­– also to sections
which have been milled – to improve
the low grip properties.

Special colours

Truly endless belts

Timing belts (as well as cams) can beproduced in special colours.

Information about truly endless belts(polyurethane and neoprene) is available
on request.

You can find more detailed
information here:
www.forbo-siegling.com

Timing belts with longitudinal tracking profiles

The wedge profiles mounted on thetiming belts ensure that the belts track
perfectly straight over the entire length,even where lateral forces are a factor.
Flanged pulleys are not required. All
timing belt types can be equipped withvarious wedge profiles.

Tolerance
dimension A = ± 1 mm

Type

Material

Colourw x h x s [mm]Hardness [Shore A]

Groove with A [mm]dmin [mm]Longitudinal tracking profiles

K 6-U65
K 10-U65
K 13-U65
K 15-U65
K 17-U65

Urethane
Urethane
Urethane
Urethane
Urethanetransparent
transparent
transparent
transparent
transparent

6x4x4
10 x 6 x 613 x 8 x 7.5
15 x 8 x 9.5
17 x 11 x 9.5

65
65
65
65
65

7
11
14
16
18

40
70
100
100
100

12

Powerbelt
Technical information
Material:		polyurethane elastomer
Hardness:		
92° Shore A
Tension member:
Steel (standard) or Kevlar (on request)
Colour:		black
Permissible operating
temperature: 		–5/+80 °C
Thickness: 		
2 mm (standard)		other thicknesses on request

For the transmission of large tensile forces,
the Forbo Siegling Powerbelt is an alternative to cables, chains and fabric belts.
Forbo Siegling Powerbelt was developed
especially for use in sports and fitness
equipment, roll-up doors and venetianblinds. It is available only as open material.
Data sheet available on request.

13

Accessories
Clamping plates

Toothed pulleys for timing belts
For the service life of the timing belt andfor smooth operations, it is vital that the
toothed pulley be matched correctly tothe timing belt.
For all timing belts in its product range,
Forbo Siegling carries the corresponding
toothed pulley.

– Standard design with boring– Special methods of attachment
on request

Clamping plates for fastening open
material are available for all timing belt
types and in all standard sizes.

– 0 pulleys and SE pulleys available
on request– Can be fabricated from drawing
Standard material for general applications
is aluminium. For higher loads, steel pulleys are recommended. Toothed pulleys
are available on request.

You can find more detailed
information here:
www.forbo-siegling.com

Endless splices
Open Siegling Proposition timing belts are made endless witha meander or Z-splice. Although with this splice approximately
50% of the tensile strength of truly endless timing belts isachieved, such belts should not be used as power transmission
belts.

Welded splices
Timing belts prepared for the meander splice can be hotpressed endless quickly and easily on-site with our heating
devices. This process makes time-consuming fitting work on
the machine unnecessary.
The SMX-HP 150/120-PP and SMX-HP 150/60-PP heating presses
can be used (with the corresponding splice guide) for all timing
belts of all widths.

14

Mechanical fasteners
Specially prepared timing belts (teeth with drilled holes) can bemade endless using pins. This procedure is ideal when low
downtimes are required when exchanging belts or carrying out
maintenance.
Mechanical fasteners are available as a standard for T5, T10, T20,
AT5, AT10 and AT20. Other types on request.

15

Committed staff, quality oriented organization and­production processes ensure the constantly high standardsof our products and services.

Metrik GmbH · Werbeagentur · Hannover · www.metrik.net
Technologiemarketing · Corporate Design · Technical Content

Siegling – total belting solutions

Forbo Movement Systems employs around2,500 people in its group of companies. Our
products are manufactured in ten production
facilities across the world.
You can find companies and agencies withwarehouses and workshops in over 80 countries.
Service points are located in more than
300 places worldwide.

Forbo Siegling GmbH
Lilienthalstrasse 6/8, D-30179 HannoverPhone +49 511 6704 0
www.forbo-siegling.com, siegling@forbo.com
Forbo Movement Systems is part of the Forbo Group,a global leader in flooring and movement systems.
www.forbo.com

Ref. no. 245-2

Our service – anytime, anywhere

09/24 · UDH · Reproduction of text or parts thereof only with our approval. Subject to change.

Forbo Movement Systems complies with total quality management principles. Our quality management system has
ISO 9001 certification at all production and fabrication sites.
What’s more, many sites have ISO 14001 environmental
management certifi­cation.