Precision Ball Bearings
ABEC 5–7 deep-groove and angular contact ball bearings, runout verified on every finished race.
Deep-groove and angular contact bearings with bore and runout measured on 100% of the finished product, not by sampling. Preload and clearance set to the application, with a dimensional report per lot.
4–6 weeks
10 pieces
ISO 9001:2015 · AS9100D
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Precision class | ABEC 5–7 / P5–P4 | - |
| Bore range | 3–120 | mm |
| Bore tolerance | 0 / −0.005 | mm |
| Radial runout | ≤0.004 | mm |
| Cage type | Brass / phenolic / steel | - |
| Inspection | 100% runout | - |
Available Materials
- Bearing steel 52100 / GCr15
- Stainless 440C
- Ceramic (Si3N4) balls
- Brass cages
- Phenolic cages
Typical Applications
- Machine tool spindles
- Medical handpieces
- Robotics joints
- Vacuum pumps
- Instrument spindles
Surface Finishes
- Ground and honed races
- Black oxide (rings)
- Passivate (440C)
- Pre-lubricated
- Shielded / sealed
Industries Served
- Medical
- Semiconductor
- Robotics
- Instrumentation
- Aerospace
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.
- Tolerance
- Bore tolerance at 0 / −0.005 mm is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Bore range at 3–120 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.
- Order size
- Minimum order is 10 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
- Do I need ABEC 7 or is ABEC 5 enough?
- ABEC 5 covers most gearbox and pump duties. Step up to 7 only when the bearing sets the final runout of the assembly, such as a spindle nose or a measurement axis - the price difference is real.
- Can you set preload for my application?
- Yes, on angular contact pairs we grind the faces so a given axial clamp produces the target preload. That way your assembly torque sets it, not a shim you have to measure.
Related part families
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Roller Bearings
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CNC Turned Shafts
Turned and ground shafts, pins and spindles held to 0.005 mm TIR on bearing journals.