Seller notes

Rollers are made from bearing steel (JIS SUJ-2/SAE 52100/DIN 100 Cr6) and have been subjected to heat treatment and precision grinding radius diameter deviation; the hardness is HV700-860 (HRC60-66) All the raw material comes from Japan directly High-purity Chromium Molybdenum alloy steel (JIS SCM415) with Carbon Nitriding heat-treatment process The hardness specification is at HV500~HV600; it always can meet the requirement of high-speed engine applications Heat treated and ground to precision ...

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