Needle Roller Bearings
Needle rollers and drawn-cup bearings for high radial load in the smallest radial space.
Needle bearings where the radial envelope is tight but the load is high - the rollers are long for their diameter, so the rating per millimetre of space is the best of any rolling element.
4–6 weeks
25 pieces
ISO 9001:2015 · IATF 16949
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bore range | Ø5–Ø120 | mm |
| Radial section | From 5 | mm |
| Precision class | P0–P5 | - |
| Shaft hardness | ≥58 | HRC required |
| Surface roughness (shaft) | Ra 0.2 | µm |
| Cage | Steel or polyamide | - |
Available Materials
- Bearing steel 52100
- Case-hardening steel 8620
- Stainless 440C
- Steel cages
Typical Applications
- Connecting rod small ends
- Gearbox pinions
- Pump bearings
- Universal joints
- Rockers and pivots
Surface Finishes
- Ground raceways
- Black oxide
- Passivate
- Pre-lubricated
- Sealed (drawn cup)
Industries Served
- Automotive & EV
- Industrial Equipment
- Hydraulics & Pneumatics
- Agricultural Machinery
- Marine
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Part size
- Bore range at Ø5–Ø120 mm decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Surface finish
- Surface roughness (shaft) at Ra 0.2 µm. Every step below the ordinary as-machined Ra 1.6 µm adds a finishing pass; a callout on a face nobody touches is the most common over-specification we quote.
- Material
- The first material listed, Bearing Steel 52100 (100Cr6), rates 4/10 on our machinability scale at 60–66 HRC hardened · 183–217 HB annealed. On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 25 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Surface roughness tester (Mitutoyo) against the Ra callout
- Rockwell hardness tester on the part, not only against the mill certificate
- Bore gauges and an optical comparator for hole position and edge form
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Does the shaft need to be hardened?
- Yes, on drawn-cup bearings the shaft is the inner raceway. Below about 58 HRC it brinells and the rollers dig in within a few thousand cycles.
- How tight should the shaft fit be?
- m6 for a normal radial load, n6 with shock. Too loose and the shaft diameter becomes the failure mode instead of the bearing.
Related part families
Roller Bearings
Cylindrical, tapered and needle roller bearings for radial loads a ball bearing cannot carry.
Sintered Bronze Bushings
Oil-impregnated bronze bushings with controlled porosity, for places you cannot re-lubricate.
Thrust Bearings
Thrust ball and cylindrical roller bearings for axial loads a radial bearing cannot take.