Thin Section Bearings
Thin section bearings for large bores where the radial depth has to stay small.
Thin section bearings for equipment where the bore is large but the radial space is not. The section is constant across the size range, so one housing design covers several diameters.
6–10 weeks
5 pieces
ISO 9001:2015 · AS9100D
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bore range | Ø20–Ø300 | mm |
| Section | Constant across sizes | note |
| Precision class | ABEC 5–7 | - |
| Radial depth | Minimal | note |
| Runout | ≤0.005 | mm |
| Cage | Brass or phenolic | - |
Available Materials
- Bearing steel 52100
- Stainless 440C
- Bronze cages
- Ceramic balls (hybrid)
Typical Applications
- Optical stages
- Robotic joints
- Semiconductor equipment
- Medical imaging
- Aerospace gimbals
Surface Finishes
- Ground races
- Passivate
- Pre-lubricated
- Sealed / shielded
Industries Served
- Semiconductor
- Medical
- Aerospace
- Robotics
- Instrumentation
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 Ø20–Ø300 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.
- 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 5 pieces, so on a first order setup and programming are spread over very few parts and they are most of the price. Repeat orders at the same quantity are cheaper without anything on the drawing changing.
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
- 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
- Why is a thin section bearing stiffer than a standard one?
- It is not - it is less stiff for the same bore, and it wants a more rigid housing to compensate. What it buys is space, not rigidity.
Related part families
Precision Ball Bearings
ABEC 5–7 deep-groove and angular contact ball bearings, runout verified on every finished race.
Angular Contact Ball Bearings
Single and paired angular contact bearings ground for preload, ABEC 5–7.
Machine Modules
Slide, index and lift modules built, aligned and function-tested before delivery.