what's needle rollers(chrome steel or stainless steel)? where's loose needles and rollers (NRA,NRB) manufacturer? how to buy precision needle rollers shafts and needle roller bearing?
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YDTech® manufacturer of precision needle rollers shafts(NRA,NRB) and needle roller bearing; supplier of cylindrical rollers or needle rollers(chrome steel or stainless steel) in china.

generally the length of needle rollers between 3-10 times the diameter, but the diameter is usually not more than 6mm.

we have over 20 years of manufacturing experience of precision rolelrs. we had most stock, delivery time: send to europe, USA, or canada only 3-5 work days

usually, the material of needle rollers(cylindrical rollers) is chrome steel 52100, then stainless steel: such as 302,304,316,306AL,420,420C,440C etc. then tungsten steel, the newest ceramic material is silicon nitride (si3n4), or zirconium oxide(ZrO2) etc.

the ends of needle rollers had different types: such as:NRA (round ends), NRB (flat ends), crowned ends, pointed ends, or one end is round(pointed), the other end is flat etc.

needle rollers main use is as rolling elements in bearings where they are particularly useful when space is limited and a high radial load is required. They are also useful as locating pins and mini shafts.

It is widely used in auto, lathe, metallurgical, textile, printing industry & other various machinery equipment. With this kind of bearing, machine design can realize the goal of small-scale & lightweight.

needle roller contour surface in the proximal surface of the slight contraction. needle and raceway contact line results can be amended to avoid damaging the edge of the stress.

manufacturer and supplier of needle rollers

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.

Technical parameters of needle rollers

precision needle rollers, needle roller bearing pins
diameter tolerance +0/-0.005, +0/-0.003, +0/-0.002, grouping for 0.001mm or 0.0005mm
length tolerance +/-0.015, +/-0.01, +0/-0.015, +/-0.005,+0/-0.005
radius R0.03-R0.3
parallelism 0.01, 0.005
perpendicularity 0.01, 0.005
circularity 0.001
cylindricity 0.001
roughness Ra0.1
needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts

chamfer limits of flat ends needle rollers

precision needle rollers, needle roller bearing pins
Dwexceed Dwto TSmin diameter direction TSmin axis direction TSmin
-10.10.30.5
11.50.10.40.6
1.530.10.60.8
360.10.91
needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts

V-block measurement for roundness of needle rollers

precision needle rollers of loose roller bearing pins
angle wave numbers
3579111315171921
90°C22--22--22
120°C1221--122
needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts
needle rollers tapered rollers cylindrical rollers dowel pins grooved pins crowned rollers needle roller bearing copyright©2016 YDTech®