Transdev Transflat polychloroprene high precision flat power transmission belts

TRANSFLAT^®150

Endless Woven Flat Transmission Belts

TRANSFLAT^® flat endless belts
feature the following properties

high strength high coefficient of friction high flexibility lightweight	constant thickness inextensible length stable
enabling vibration-free drives, very high belt speeds, reduced dimensions, high performance and minimum maintenance. TRANSFLAT^® belts consist of a high strength core, endless fabric and a rubber carcass with excellent mechanical properties and a high coefficient of friction

Table 2.
TRANSFLAT^® Standard Belt Lengths (mm)*
mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
330	460	605	760	940	1120	1325	1530	1770	2045	2365	2750
340	480	620	780	960	1140	1350	1560	1800	2080	2410	2800
350	500	635	800	980	1160	1375	1590	1835	2120	2455	2850
370	515	650	820	1000	1180	1400	1620	1870	2160	2500	2900
385	530	665	840	1020	1200	1425	1650	1905	2200	2550	2950
400	545	680	860	1040	1225	1450	1680	1940	2240	2600	3000
420	560	700	880	1060	1250	1475	1710	1975	1180	2650	3050
430	575	720	900	1080	1275	1500	1740	2010	2320	2700	3100
450	590	740	920	1100	1300
*as measured under a static tension of 12kg/cm width Matched sets of belts must be cut from same sleeve. Please specify when ordering.

Table 3.
TRANSFLAT^® Length , Width & Thickness Tolerances
Nominal Lengths	Poss. % Tolerance	Thickness	Width
330 to 480mm	+/- 2.0%	+/- 0.2mm	+/- 0.5mm
500 to 980mm	+/- 1.5%
1000 to 3100mm	+/- 1.0%
As TRANSFLAT^® belts are endlessly woven nominal lengths can vary between sleeves and therefore drive layouts should allow for the adjustment of centres to provide the requisite drive tension.

Table 4.

Basic Kilowatt Ratings (KW per cm/width) with 180° Arc of Contact

Belt Speed m/sec

TRANSFLAT
Small Pulley Diam. (mm)

Belt Speed m/sec

TRANSFLAT
Small Pulley Diam. (mm)

Belt Speed m/sec

TRANSFLAT
Small Pulley Diam. (mm)

>34

2.5

0.11

0.15

0.17

0.19

0.21

22.5

0.73

1.09

1.36

1.54

1.63

42.5

2.26

2.56

0.21

0.29

0.34

0.38

0.40

0.78

1.19

1.48

1.69

1.80

2.28

2.63

7.5

0.31

0.41

0.50

0.56

0.60

27.5

1.28

1.59

1.81

1.95

47.5

2.27

2.66

0.39

0.54

0.66

0.74

0.78

1.35

1.68

1.93

2.09

2.71

12.5

0.47

0.66

0.82

0.91

0.97

32.5

1.77

2.02

2.21

52.5

2.73

0.53

0.78

0.96

1.07

1.14

1.84

2.10

2.31

2.71

17.5

0.61

0.88

1.11

1.24

1.32

37.5

1.91

2.17

2.41

57.5

2.69

0.66

0.99

1.23

1.39

1.49

1.96

2.23

2.5

2.64

Table 5.

Pulleys

Pulley Diam. d (mm)	Crown Height h (mm)	Pulley Diam. d (mm)	Crown Height h (mm)
15	0.3	100	0.3
20	0.3	112	0.3
25	0.3	125	0.4
30	0.3	140	0.4
35	0.3	160	0.5
40	0.3	180	0.5
45	0.3	200	0.6
50	0.3	224	0.6
56	0.3	250	0.8
63	0.3	280	0.8
71	0.3	315	1.0
80	0.3	355	1.0
90	0.3

Pulleys should be manufactured from quality materials and be accurate.

It is important to ensure :

1) the driving surface of the pulley is perfectly smooth.

2) the outside diameter of the pulley is concentric to the bore.

3) pulleys are well balanced both statically and dynamically.

4) at least one of the pulleys (driver) should be crowned.

Drive Design, Belt Fitting and Tensioning

A drive must be designed to allow for the correct tensioning of the belt and to adjust for any stretch during service (possibly 1.5% of length).

A take-up device is therefore required: motor slide bases are the most efficient system for ease of fitting and tensioning the belt.

Idlers may be used to increase arc of contact on high transmission ratios. With contra-flexure due to the use of idlers it is recommended that the idler diameters should not be less than the diameter of the small pulley.

The initial or static tension should correspond to the measuring tension in Table 2

The following recommendations should always be followed :

check that the pulleys are aligned;
ensure that the pulley surfaces are smooth and well polished;
apply the correct belt tension;
check the belt tension frequently during the first few hours of operation;
do not use any belt grip dressing, the natural belt grip will prevent any slippage if the drive has been properly designed.

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Table 1.
TRANSFLAT^® Standard Belt Widths (mm)
10	15	20	25	30	35	40	45	50	60	70	80	90