the heat treatment process for needles rollers typically involves quenching and tempering to achieve the desired properties. quenching is the rapid cooling of the steel from a high temperature, usually by immersion in oil or water, which hardens the steel by creating a martensitic structure. the quenching process is essential for achieving the required hardness and strength in the rollers.
after quenching, the rollers are usually tempered, which involves reheating the steel to a lower temperature to reduce the brittleness and improve the toughness of the steel. This step helps to reduce the risk of the rollers cracking or fracturing under high loads or impact.
to produce bearing steel cylindrical rollers or needle rollers, the bearing steel is first processed into wire or rod form, which is then cut and formed into the desired shape of the cylindrical roller or needle roller. The rollers are then heat treated to improve their hardness and wear resistance, and the surfaces are typically finished through grinding or polishing to ensure precise dimensions and a smooth surface finish.
we are professional manufacture of bearing rollers and cylindrical needle rollers. we produce rollers of diameter 0.5 mm to 60 mm. the rollers could satisfy the request of DIN 5402 G2 rollers.
specification | mark | C | Si | Mn | S | P | Cr | Mo | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
china(GB) | GCr15 | 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | <0.025 | <0.025 | 1.40-1.65 | - | ||||||
USA(AISI,UNS) | 52100(G52986) | 0.98-1.10 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.10 | ||||||
japan (JIS) | SUJ2 | 0.95-1.10 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.08 | ||||||
germany(DIN/W-Nr) | 100Cr6/w3(1.3505) | 0.95-1.05 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.08 | ||||||
france NF | 100C6 | 0.95-1.05 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.08 | ||||||
UK(BS) | 535A99 | 0.95-1.05 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.08 | ||||||
sweden(SKF) | SKF3 | 0.95-1.05 | 0.15-0.35 | <0.5 | <0.025 | <0.025 | 1.30-1.60 | <0.08 | ||||||
rolling bearing chrome (axletree) steel needles rollers pins, chrome steel needle rollers,mini shafts , rollers pins needles |
Dwexceed | Dwto | TSmin | diameter direction TSmin | axis direction TSmin | |||||
---|---|---|---|---|---|---|---|---|---|
- | 1 | 0.1 | 0.3 | 0.5 | |||||
1 | 1.5 | 0.1 | 0.4 | 0.6 | |||||
1.5 | 3 | 0.1 | 0.6 | 0.8 | |||||
3 | 6 | 0.1 | 0.9 | 1 | |||||
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angle | wave numbers | ||||||||||
3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | ||
90°C | 2 | 2 | - | - | 2 | 2 | - | - | 2 | 2 | |
120°C | 1 | 2 | 2 | 1 | - | - | 1 | 2 | 2 | ||
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