Along with high-quality engine valves, piston rings and valve guides Paradowscy AMP introduces piston pins produced with the same high standard technology and requirements.
An important part of the crankset is the piston pin. It serves to transfer to the connecting rod the forces resulting from gas pressures acting on the piston. The pin is subjected to forces of variable size and direction.
As the material used for the production of piston pins, Paradowscy AMP uses constructional steel 16 NS (chromium-manganese). The durability and strength of the product are obtained through the appropriate selection of heat treatment technology, as a result of which the pin core is plastic and the surface - hard. This is possible thanks to the use of two-sided cementing at a depth of 0.6-1.1 mm of the external surface and 0.3-0.7 mm of the internal surface followed by hardening. Thanks to this heat treatment mode, it is possible to obtain a hardness of 57-65 HRC on the outer surface of the pin and 28-49 HRC on the inner surface.
Increased fatigue strength of the bolts is also obtained by thoroughly polishing their outer cylindrical surface. The Paradowscy AMP company pays special attention to the control of the external surface roughness, which should not exceed Rа 0,125.