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YDTech® Precision Needle Pin Rollers (NRA/NRB) - Mini Shafts D0.5mm-15mm.

We manufacture high-precision cylindrical pins and loose needle rollers in NRA/NRB ends. Unlike large slewing rings, our mini shafts range from D0.5mm to D15mm, stocked for immediate global shipment.

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.

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.

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.

Difference: cylindrical roller vs. needle roller

precision needle rollers, needle roller bearing pins
Feature Cylindrical Roller Needle Roller
Profile Stout. Length ≈ Diameter. Slender. Length >> Diameter (like a needle).
Radial Space Requires more radial space for a given bore size. The most compact radial profile.
Load Capacity Very high radial capacity, but in a larger cross-section. Highest possible radial capacity per unit cross-section.
Speed Designed for high speeds. Generally for low to moderate speeds (except cage-guided types).
Axial Movement Yes. Many designs allow free shaft float. Typically no. Usually located axially.
Cost & Assembly Often more complex, separable, higher cost. Simpler, often cheaper, especially drawn-cup types.ess =
needle rollers, needle roller bearings, miniature pins, needle rollers suppliers, precision shafts

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

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

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
cylindrical rollers needle rollers needle rollers DE carbide pins valve balls manufacturing process copyright©2026 YDTech®