52100 Bearing Steel Round Bar: 52100 is a high-carbon chromium alloy steel used in bearing and wear applications where appropriate hardening and final grinding support tight dimensions.
Download Mozaic 52100 Bearing Steel Round Bar technical reference PDF
52100 Bearing Steel Round Bar — Technical Overview
| Specification item | Reference or order requirement |
|---|---|
| Grade or product | 52100 Bearing Steel Round Bar |
| Material designation / identity | SAE/AISI 52100 / UNS G52986; high-carbon chromium steel |
| Specification to review | ASTM A295 for qualifying bearing steel products |
| Delivery/heat-treatment condition | Spheroidize-annealed or hardened-and-tempered state |
| Examples of applications | Bearing races, precision wear rollers, shafts and bearing-related components |
| Quotation and inspection | Provide OD, length, finished tolerance, surface finish and heat-lot documents |
Engineering reference, not a mill test report. Actual chemistry, properties, condition, availability and qualification must meet the ordered product specification and accompanying certification.
Material Properties, Typical Parts and Selection
52100 is not equivalent to ordinary high-carbon round bar; cleanliness and heat treatment may be critical. Representative applications include bearing races, precision wear rollers, shafts and bearing-related components. Suitability depends on the environment, grade, geometry, strength/temper and processing route. Specify finished-size and material performance separately; two alloys with similar commercial names may have different test standards.
Precision Grinding, Straightening and Bar Finishing
Mozaic Precision Metals supports project-specific bar sourcing and centerless grinding, straightening, polishing, cutting, chamfering and packaging. Describe the incoming and finished OD, bar length, drawing requirements, production quantity and material traceability. Surface roughness, diameter tolerance and straightness are independent acceptance characteristics, and actual capability is confirmed by quote.
Related Grades and Application Alternatives
- 4340 steel — related but not automatically interchangeable
- 4140 round bar 2 — related but not automatically interchangeable
Common Buyer Questions
What condition must be specified for 52100 Bearing Steel Round Bar?
Spheroidize-annealed or hardened-and-tempered state. If the condition is not on the drawing, request the engineer’s confirmation before ordering or machining.
Are nearby grades automatic equivalents?
No. 52100 is not equivalent to ordinary high-carbon round bar; cleanliness and heat treatment may be critical. Mechanical-property and chemical compliance must be verified against the applicable specification and mill certification.
Request a Quote
Email sales@mozaicprecision.com, call 847-637-8379, or request pricing and availability online.