The KettenWulf roller chains for high-stress applications.
The chain series HFS “High Fatigue Strength” was developed
as a response to the ever-increasing requirements
in the field of drive technology. The KettenWulf
HFS roller chain has the best quality standard on the
market.
Apart from the optimised wear resistance, the main
focus is to provide ultimate fatigue strength properties.
The high alloy case-hardened steel (up to 1 ¼")
of the pins guarantees an outstanding shear strength
and a very high flexural strength. The cold drawing
process for manufacturing the pins guarantees a high
surface hardness while ensuring a high surface quality
at the same time.
The wear resistance is further improved by grinding
the pins’ surface after drawing. Pins that are 1 1/2" or
bigger are made of high alloy heat-treated steel. Such
pins ensure an even better fatigue strength of the
chains and increase the effective breaking loads.
The seamless bushes are characterised by their optimal
cylindricity which is much higher than that of precision
steel pipe bushes. The chain has a high length
precision and a minimum elongation when engaging
on the sprocket.
The Cr-alloy steel for the bushes further increases
the wear resistance compared to the KettenWulf KW
chains.
The high precision of the manufacturing process
ensures cylindrical holes in the link plates with the
highest possible proportion of clear-cut surface. Such
a clear-cut surface is required to ensure high press fit.
Combined with the outstanding properties of the
Cr-alloyed heat-treated steel material this makes
KettenWulf HFS roller chains more durable and
resistant to fatigue. The seamless and tempered roller
ensures a high level of shock and wear resistance.
HFS roller chains
1 Pins made of special alloyed
case-hardened steel, cold-extruded
(pins starting from 1 1/2" are made
of high alloy heat-treated steel
and through hardened), grinded
2 Bush – seamless, wear-optimised,
cold-extruded bush, case-hardened
3 Roller – seamless, cold-extruded
Roller, quenched and tempered
4 Link plates – high-precision
stamped, quenched and tempered
ball-blasted, holes calibrated with
particularly high percentage
contact area. The plate shape
is wide waisted
High Fatigue Strength (HFS)
roller chains
3
4
2
1
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