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Bearing Steel Ball

Stainless Steel Ball(304, 316, 420, 440) is a type of ball made from stainless steel

Bearing Steel Balls

Bearing steel balls are the core components of rolling bearings and are usually made of bearing steel (such as GCr15 or international equivalent grades) with high precision, high hardness, wear resistance and fatigue resistance.

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Bearing Steel Balls Specifications

Internation Standards and Material Codes

GB/T	ASTM	JIS	EN	ISO
GCr15	AISI 52100	SUJ2	Wks 1.3505	100Cr6/ 100C6（中国）

Chemical composition

	C	Si	Mn	P	S	Cr	Ni	CU	Mo
100Cr6	0.93–1.05%	0.15–0.35%	0.25–0.45%	≤0.030%	≤0.025%	1.35–1.65%	≤0.30%	≤0.30%	≤0.08%
100C6	0.95–1.10%	0.15–0.35%	0.25–0.45%	≤0.030%	≤0.025%	1.35–1.65%	≤0.30%	≤0.30%	≤0.10%
AISI 52100	0.93–1.05%	0.15–0.35%	0.25–0.45%	≤0.025%	≤0.015%	1.35–1.60%	≤0.30%	≤0.30%	Mo
SUJ2	0.95–1.10%	1.30–1.60%	0.25–0.45%	≤0.025%	≤0.025%	1.30–1.60%	≤0.25%		≤0.08%
ZGZR15	0.95-1.05%	0.15-0.35%	0.25-0.45%	≤0.027%	≤0.20%	1.30-1.65%	≤0.25%		≤0.10%

Bearing Stainless Steel Ball Physical Properties

Item	Parameters
Tensile strength	1600–2000 Mpa
Yield strength	1400–1800 Mpa
Elastic modulus	20–30 MPa·m^
Density	7.58g/cm³

Technical Conditions of Steel Ball

Over	to	Average	Max	Average	Max	Average	Max
4.5	6.5	39.5	41.5	37.5	39.5	35.5	37.5
6.5	7.5	40	42	38	40	36	38
7.5	10	40.5	42.5	38.5	40.5	36.5	38.5
10	11	42	44	40.5	42.5	36.5	40.5
11	12	42.5	44.5	41	43	39	41
12	13	43	45	41.5	43.5	39.5	41.5
13	14	43.5	45.5	42	44	40	42
14	15	44	46	42.5	44.5	40.5	42.5
15	16	44.5	46.5	43	44.5	40.5	42.5
16	17	45	47	43	45	41	43
17	17.5	45.5	47.5	43.5	45	41	43

Log Diameter Variation and Normal Gauge

	Lot Diameter Variation	Guages Interval	Preferred Guages	Subguage Interval	Subguages
Gade
10	0.5	1	-9,-1,0+1,+9	0.2	-0.4,0.20.,+0.2,+0.4
16	0.8	2	-10,-2,0+2,+10	0.4	-0.8,0.40.,+0.4,+0.8
20	1	2	-10,-2,0+2,+10	0.4	-0.8,0.40.,+0.4,+0.8
24	1.4	2	-12,-2,0+2,+12	0.4	-0.8,0.40.,+0.4,+0.8
28	2	4	-16,-4,0+4,+16	0.8	-1.6,-0.80.,+0.8,+1.6
40	3	5	-20,-5,0+5,+20	1	-2,-1,0,+1+2

Grade: G10 to G1000

	Ball diameter variation	Spherical deviation	Surface roughness	Diameter variation	Diameter tolerance
Gade	Vdws	△Sph	Ra	Vdwl	Tdn
	Not Over
	μm
10	0.25	0.25	0.02	0.5	*
16	0.4	0.4	0.032	0.8	*
20	0.5	0.5	0.04	1	*
24	0.6	0.6	0.05	1.2	*
28	0.7	0.7	0.06	1.4	*
40	1	1	0.08	2	*
60	1.5	1.5	1	3	*
100	2.5	2.5	0.1	5	±12.5
200	5	5	0.15	10	±25
500	12.5	12.5	*	25	±50
1000	25	25	*	50	±125

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How to Build Bearing Steel Balls

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Features of Bearing Steel Balls

High Hardness: Achieve HRC 60-66, enabling them to withstand high loads and resist deformation under intense pressure.

High Fatigue Resistance: Capable of enduring repeated rolling contact stresses, preventing fatigue spalling or cracking.

Good Dimensional Stability: Minimal deformation after heat treatment, maintaining consistent size and shape for precision applications.

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Application of Bearing Steel Ball

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Our Factory

Changzhou Risheng Steel Ball Co., Ltd. is located on the eastern shore of Taihu Lake, adjacent to Shanghai, with convenient transportation. Since its establishment in June 1995, the company has been dedicated to developing and manufacturing steel balls, integrating research and development with trade.

For many years, Risheng building on the foundation of the Wujin Metal Ball Research Institute, has been committed to researching steel ball manufacturing technology. We primarily produce shaft steel balls (AISI 52100), stainless steel balls (AISI 201/304/316/420/440/430), and carbon steel balls (AISI 1015/1045/1085) with diameters ranging from 0.8mm to 25.4mm, with precision grades up to G10, G40, and G100. We also offer custom specifications for alloy steel balls, military steel balls, copper balls, UFO balls, ceramic balls, and other metal balls.

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Packaging & Deliver of Bearing Steel Balls

High-strength inner packaging: Shockproof foam bags or custom plastic boxes are used to secure each bearing stainless steel ball in place, protecting it from impacts and scratches.

Moisture-proof protection: A moisture-proofing agent is added to effectively prevent the impact of moisture on the product during transportation.

Sturdy outer packaging: Thickened corrugated cardboard boxes or wooden pallets (for large orders) are used to ensure safe long-distance transportation.

Clear labeling: Product specifications, quantity, and drop warnings are clearly marked on the outer packaging box for easy verification and safe handling.

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Service Process

You can expect sound service from risheng service technicians when and where you need it most. From our application insight to our confidence at the counter, risheng will work to answer your requests with expert care and promptness. We know your better than anyone.

1

Speciality SERVICES

Professionally manufactured bearing stainless steel balls, using precision technology to ensure excellent hardness and corrosion resistance, suitable for industrial precision applications.
2

Quality SERVICES

High-quality bearing stainless steel balls, strictly quality inspected, with high surface finish and hardness up to HRC 50-55, provide reliable and durable performance.
3

Extra Mile PRICING

High-quality service response, rapid customized production, global logistics distribution, technical consultation and after-sales support to meet diverse needs.

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FAQ of Bearing Steel Balls

Q What are the advantages of your company?

A
After-Sales Service – A professional team is available to assist you at any time.
Strict Quality Control – Each production stage is thoroughly inspected by our QC team.

Professional Packaging – Secure packaging ensures safe delivery.

Free Samples – Available for quality confirmation before purchasing.