Page 104 - TBIS_15194-2019_(EN)_3nd
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TBIS 15194:2019
4.3.13 Drive-chain and drive belt
4.3.13.1 Drive-chain
Where a chain-drive is used as a means of transmitting the motive force, the chain
shall operate over the front and rear sprockets without binding.
The chain shall conform to the tensile strength and push-out force requirements of
ISO 9633. But the tension strength of racing bike should higher than 9000 N, and
record the yield point and Max. strength value and push-out force during the test.
4.3.13.2 Drive belt
4.3.13.2.1 Requirement
Where a belt-drive is used as a means of transmitting the motive force, the drive belt
shall operate over the front and rear pulleys without binding. And when tested by
the methods described in 4.3.13.2.2, there shall be no evidence of cracking, fracture
or delamination of the belt drive.
4.3.13.2.2 Test method
Set up a fixture with two drive pulleys that are similar or identical as shown in Figure
43. At least one pulley should be free to rotate. Increase the tensile load gradually
until the tension load of the belt reaches 4 000 N.
NOTE 4 000 N is the tension load within the belt and requires a load F of 8 000 N to achieve
this tension load.
Figure 43 — Drive belt – Tensile strength test
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