Views: 0 Author: Site Editor Publish Time: 2026-07-22 Origin: Site
When specifying the rolling elements for a thrust bearing, the ball's material, precision, and consistency directly determine load capacity, running accuracy, and service life. As a professional bearing steel balls manufacturer, we supply steel balls for thrust bearings made from GCr15 high-carbon chromium bearing steel, produced to GB/T 308.1-2013 (equivalent to ISO 3290) and achieving Grade 16 (G16) precision. They correspond to the international equivalent grades AISI 52100 / 100Cr6 / SUJ2 and are widely used in all types of thrust bearings and precision mechanical drives.
Thrust bearing steel balls are the rolling elements seated between the raceways of a thrust bearing to carry axial loads. Unlike radial bearings, a thrust bearing primarily bears force along the shaft axis, so requirements for hardness, sphericity, lot diameter consistency, and surface roughness are especially strict. A single ball that is out of tolerance or under-hardened can cause rough running, elevated noise, or premature bearing failure.
GCr15 is the most widely used high-carbon chromium bearing steel. It offers high hardness, high wear resistance, excellent contact-fatigue strength, and good dimensional stability — making it the classic material for bearing rings and rolling elements. In many export markets it is marketed simply as chrome steel or AISI 52100 chrome steel.
The main chemical composition of GCr15 (per GB/T 18254-2016, High-Carbon Chromium Bearing Steel) is approximately:
| Element | Content (%) |
|---|---|
| Carbon C | 0.95–1.05 |
| Silicon Si | 0.15–0.35 |
| Manganese Mn | 0.25–0.45 |
| Chromium Cr | 1.40–1.65 |
| Phosphorus P | ≤0.025 |
| Sulfur S | ≤0.025 |
For export orders or imported drawings, GCr15 corresponds to the following international equivalent grades:
| Standard | Grade |
|---|---|
| China GB | GCr15 |
| USA AISI/SAE | AISI 52100 |
| Germany DIN/EN | 100Cr6 (1.3505) |
| Japan JIS | SUJ2 |
| International ISO | 100Cr6 |
Grade 16 (G16) is the ball's precision-grade designation — the lower the number, the higher the precision. G16 is a medium-high precision grade suitable for the vast majority of thrust bearings and precision drives. This grade controls the following key parameters:
Deviation from spherical form (sphericity): approx. ≤0.4 μm
Surface roughness Ra: approx. ≤0.032 μm
Lot diameter variation and ball diameter tolerance: within the limits defined by the standard
Higher precision grades deliver better running accuracy, lower vibration and noise, and longer bearing life — which is precisely why Grade 16 chrome steel balls are so widely adopted in thrust bearings.
Thanks to the GCr15 material and Grade 16 precision, our steel balls for thrust bearings are used in:
Thrust ball bearings and thrust angular-contact ball bearings
Automotive steering systems, gearboxes, and drivetrain components
Motors, gear reducers, and rotary tables
Construction, agricultural, and textile machinery
Any precision machinery required to carry axial loads
Beyond thrust bearings, GCr15 balls are equally suited to radial ball bearings, linear guides, and ball screws. If you need other materials, see our stainless steel balls and carbon steel balls product lines.
Faced with many bearing steel ball suppliers, buyers can judge a factory's capability on these points:
Traceable material — Can they provide a material certificate (mill test certificate) for the GCr15 raw material?
Guaranteed precision — Can they consistently produce Grade 16 and higher, and provide an inspection report?
Testing capability — Do they have the equipment and capability to measure diameter, sphericity, hardness, and surface roughness?
Supply stability — Can they support batch and recurring orders (for example, a steady demand of roughly 10 tons every two months)?
Responsive service — Are quoting, sampling, and lead-time communications professional and efficient?
As an established GCr15 chrome steel ball manufacturer, we support customers on every point above. Learn more via About Us and Quality Control.
| Item | Details |
|---|---|
| Product | Thrust bearing steel balls / steel balls for thrust bearings |
| Material | GCr15 high-carbon chromium bearing steel |
| Material standard | GB/T 18254-2016 |
| Ball standard | GB/T 308.1-2013 (ISO 3290 equivalent) |
| Precision grade | Grade 16 / G16 (other grades available on request) |
| Equivalent grades | AISI 52100 / 100Cr6 / SUJ2 |
| Available size range | Multiple sizes, custom production — inquiries welcome |
| MOQ | Flexible / negotiable — please contact us to confirm |
| Lead time | Reliable delivery, confirmed by order volume |
| Packaging | Rust-preventive + wooden case / carton, per customer requirement |
| Quality documents | Material certificate and inspection report available |
Working directly with a bearing steel ball manufacturer helps buyers control price, quality, communication, and delivery. Compared with trading-only suppliers, a factory can better support custom size confirmation, bulk order planning, quality inspection, and repeated supply.
RISHENG focuses on precision steel balls, including:
Bearing steel balls
GCr15 steel balls
AISI 52100 steel balls
Carbon steel balls
Custom precision balls
Steel balls for bearings and industrial parts
If you are looking for a China GCr15 steel ball factory, Grade 16 bearing ball supplier, or AISI 52100 steel ball manufacturer, RISHENG can support your thrust bearing project with stable quality and competitive quotation.
