Views: 0 Author: Site Editor Publish Time: 2026-01-30 Origin: Site
Bearing Steel balls are indispensable components in the bearing industry and grinding & pulverizing industry. Common types include bearing steel balls, stainless steel balls, carbon steel balls, and alloy steel balls. Although small in size, steel balls play a critical role in load carrying capacity and service life in transmission systems. The manufacturing process directly determines product quality and performance.
Risheng (Changzhou Risheng Steel Ball Co., Ltd.) is a leading manufacturer specializing in high-precisionbearing steel balls, including chrome steel, stainless steel, carbon steel, and alloy varieties. Risheng excels in automation, strict process control, cleanliness, consistency, and superior surface integrity — delivering exceptional hardness, fatigue resistance, roundness, and long service life for demanding applications in automotive bearings, industrial
machinery, valves, slides, and more.
Raw Material Inspection & Preparation
Every heat/lot of material is rigorously inspected for chemistry, microstructure, and inclusion content. Wire rod is drawn through precision wire drawing machines to the exact diameter required.
Cold Heading (Cold Forging)
At room temperature, the wire is upset and formed into near-spherical ball blanks (green balls) using high-speed cold heading machines.
Flashing (Belt Removal)
Excess flash (equatorial belt) is removed and the ball is preliminarily rounded. This step significantly improves surface roughness and sphericity.
Heat Treatment (Carburizing + Quenching + Tempering)
Balls are carburized, quenched, and tempered in continuous mesh-belt furnaces with precise atmosphere, temperature, and time control. This creates the ideal case depth, core toughness, hardness (usually HRC 60–65), and crush load resistance.
Shot Peening / Surface Strengthening
Balls are peened in high-speed peening machines, inducing compressive residual stress on the surface, improving fatigue life and resistance to subsurface cracking.
Hard Grinding
Balls are ground between fixed cast-iron plates and rotating grinding wheels under controlled pressure to remove scale and further improve geometry and surface finish.
First Lapping (Rough Lapping)
Two cast-iron lapping plates with diamond or ceramic abrasive are used under pressure to achieve initial precision grade accuracy and surface quality.
100% Visual Inspection + Automated Defect Detection (AVKIO)
100% manual visual sorting
AVKIO multi-sensor inspection (photoelectric + eddy current + vibration) to detect surface defects, shallow cracks, and internal material imperfections.
Precision Lapping (Fine Lapping)
Final lapping on ultra-precise cast-iron plates with finer abrasives removes minimal stock and achieves the highest roundness, surface finish (Ra < 0.02 μm), and grade accuracy (G3–G10 or better).
Ultrasonic & High-Pressure Washing
Spiral washing machines combined with filtered, recirculated cleaning solutions ensure ultra-clean surfaces with minimal risk of damage or contamination.
Final Inspection & Sorting
Diameter and lot variation
Roundness / sphericity
Hardness (Rockwell & microhardness)
Metallographic structure
Residual stress
Surface roughness Balls are then sorted into precise tolerance groups.
Anti-Rust Treatment & Packaging
Balls are sprayed or dipped in high-performance rust preventive oil and packaged according to customer specifications (vials, bags, trays, etc.) under cleanroom conditions.
What is the difference between bearing steel balls and stainless steel balls?
Bearing steel balls (e.g., GCr15 / 52100) offer maximum hardness and fatigue life; stainless steel balls (AISI 304/316/420/440C) provide superior corrosion resistance but lower load capacity in some cases.
What grade of steel ball should I choose?
G3–G5 for ultra-high precision applications; G10–G16 for standard industrial bearings; G28–G40 for general commercial use.
Where can I source high-quality Risheng steel balls?
Contact reputable suppliers like Changzhou Risheng Steel Ball Co., Ltd., with full traceability, certifications, and detailed inspection reports.
