Service life Wear resistance
The service life is the period of time in which the roller
chain is guaranteed to work without breaking and
within acceptable wear standards. Generally recognized
codes of practice stipulates that a chain is considered
to be worn once it has gained in length by 2%.
At a 1.5-% elongation the safe and reliable operation
of the chain can no longer be guaranteed and there is
a real risk of rupture or damage.
For protection and to ensure a high output the roller
chain is no longer considered to be fit for operation
once it has gained 1.5% in length.
The main reason for wear on a chain is the friction
between the bush and the pin when the sprocket engages
causing the chain to extend. The magnitude of
the oscillating movement depends on the number of
teeth on the sprocket. The lower the number of teeth,
the higher the wear. Lubrication plays an important
role here, too.
What makes KettenWulf roller chains resistant to
wear is the high precision and the uniform finish of
the seamless bushes and the perfect roundness of
the pins. This is complemented by an optimal selection
of case-hardened and tempered steel.
Operational life
ordinary chain
standard chain
premium chain
KW HFS
Elongation %
Only with initial lubrication
| 15