Chemical composition

Material	C%	Si%	Mn%	Cr%	Cu%
52100	0.98~1.10	0.15~0.35	0.25~0.45	1.30~1.60
GCr15	0.95~1.05	0.15~0.35	0.25~0.45	1.40~1.65	0.25
GCr15SiMn	0.95~1.05	0.45~0.75	0.95~1.25	1.40~1.65	0.25
100Cr6	0.93~1.05	0.15~0.35	0.25~0.45	1.35~1.60
SUJ2	0.95 or 1.10	0.15 or 0.35	0.50 max	1.30~1.60

A.F.B.M.A. STANDARDS(U.S.A)
AFBMA GRADES	ROUNDNESS		LOT DIAMETER VARIATION		BASIC DIAMETER TOLERANCE		MAX. INCREMENTS		SURFACE RCUGHNESS
AFBMA GRADES	INCHES	μm	INCHES	μm	INCHES	μm	INCHES	μm	INCHES	μm
3	.000003	0,08	.000005	0,13	±.00003	0,76	.000010	0,25	.5	0,012
5	.000005	0,13	.000010	0,25	±.00005	0,27	.000010	0,25	.8	0,020
10	.000010	0,25	.000020	0,51	±.0001	2,54	.000010	0,25	1.0	0,025
16	.000016	0,38	.000032	0,76	±.0001	2,54	.000010	0,25	1.0	0,025
24	.000024	0,63	.000048	1,27	±.0001	2,54	.000010	0,25	2.0	0,050
48	.000048	1,27	.000096	2,54	±.0002	5,08	.000050	0,12	3.0	0,076
100	.0001	2,50	.0002	5,08	±.0005	12,70	.0001	2,54	5.0	0,120
200	.0002	5,08	.0004	10,20	±.001	25,40	.0002	5,08	8.0	0,203
500	.0005	12,70	.001	25,40	±.002	50,80	.0005	12,70	-	-
1000	.001	25,40	.002	50,80	±.005	127,00	.001	25,40	-	-

DIN5401(GERMAN STANDARDS)
DIN 5401 GRADE	ROUNDNESS μm	LOT DIAMETER VARIATION μm	BASIC DIAMETER TOLERANCE μm	GAUGE INTERVAL μm
I	0,25	0,50	±10,25	0,50
II	0,50	1,00	±10,50	1,00
III	1,00	2,00	±11,00	2,00
IV	2,00	4,00	±14,00	4,00
V	25,00	50,00	±75,00	50,00
VI	-	400,00	±200,00	-

APPROXIMATE EQUIVALENT GRADES BETWEEN ISO 3290,AFBMA,DIN
GRADES	AAAA	AAA	AA	A	B	C	∅mm
ISO3290	5	10	16	28	40	100	up to 3 included
	10	16	28	40	100		from 3 to 6 included
	10	16	28	40	100	200	from 6 to 10 included
	16	20	28	40	100	200	from 10 to 20 included
		28	40	100	200		from 20 to 30 included
		40		100	200		from 30 to 50 included
		40	100	100	200		over 50

AFBMA	5	10	16	24	48	100	up to 3 included
	10	16	24	48	100	100	from 3 to 6 included
	10	16	24	48	100	200	from 6 to 10 included
	16	16	24	48	100	200	from 10 to 20 included
		24	48	100	200	300	from 20 to 30 included
		48	48	100	200	300	from 30 to 50 included
		48	100	100	200	300	over 50

DIN	class -	class I	class II	class III	class IV	-	up to 3 included
	-	I	II	III	IV	-	from 3 to 6 included
	I	II	III	-	IV	-	from 6 to 10 included
	-	III	III	IV	-	-	from 10 to 20 included
	II	-	III	IV	-	-	from 20 to 30 included
	-	-	III	IV	-	-	from 30 to 50 included
	-	-	III	IV	-	-	over 50

1. Ball bearing overview

Ball bearing is a kind of rolling bearing. The spherical alloy steel ball is installed between the inner steel ring and the outer steel ring to reduce the friction during the power transmission process and improve the transmission efficiency of mechanical power by rolling. Ball bearings cannot withstand large heavy loads and are more common in light industrial machinery. Ball bearings are also called ball bearings.

2. Ball bearing overview

Common equipment that uses ball bearings are: motor drive shafts, transmission parts of light (civilian) motor vehicles, machining equipment, factory production line mechanical transmission assemblies, etc.

3. Ball bearing elements

Ball bearings mainly contain four basic elements: ball, inner ring, outer ring and cage or retainer. General industrial ball bearings meet the AISI52100 standard. The balls and rings are usually made of high-chromium steel, and the Rockwell C-scale hardness is about 61-65.

4. Ball bearing performance

The hardness of the cage is lower than that of the ball and the ring, and its material is metal (such as: medium carbon steel, aluminum alloy) or non-metal (such as: Teflon, PTFE, polymer material). Rolling bearings have smaller rotational frictional resistance than journal bearings, so at the same speed, the temperature due to friction will be lower.

Ball bearings are generally used in low-load mechanical transmission equipment. Because the bearing area of the ball bearing is small, it is very easy to cause serious mechanical damage in the case of high-speed operation. Therefore, in the mechanical transmission of heavy loads, needle roller bearings are often used to increase the bearing surface, improve the mechanical transmission efficiency, and reduce the mechanical damage.

The ball bearing changes the friction mode of the bearing and adopts rolling friction, which more effectively reduces the friction between the bearing surfaces, improves the service life of the fan bearing, and thus prolongs the service life of the radiator. The disadvantage is that the process is more complicated, the cost is increased, and it also brings higher working noise.

Material: Chrome(AISI52100/ GCr15/GCr15SiMn/ 100Cr6/ Suj2 and so on)

Diameter:0.2mm - 250mm(Professional production line 4.763mm 3/16",7.938mm 5/16" ,9.525mm 3/8"and so on )

Grade: G5 / G10 / G16 / G20 / G28 / G40 / G100 / G200 / G500 / G1000 / G2000 according to ISO, DIN, or AFBMA standard

We have 15 years of experience in producing copper and brass balls. Can produce balls of any material, any shape, any size. The ball can be drilled, threaded, plated, etc.

We introduce brass and copper balls this time. If you have other questions, you can contact our service staff.

Our company is looking forward to and attaches great importance to cooperation with you.

We can pack according to your request.We use four packaging methods by default:
1：Use two layers of sealed bags and small cartons, which are suitable for sending samples. Weight less than 10kg

2：Packed in cartons with four small cartons and sealed bags, weighing between 10kg and 25kg

3：Packed in woven bags, consisting of two layers of woven bags and two layers of sealed bags, weighing between 25 kg and 40 kg
4：Use plastic shell，put 1 ball in each card slot，collision avoidance，his is suitable for high polish balls and large size balls.

We can provide any certificate report, environmental protection certificate of brass ball, chemical composition report, environmental protection certificate of the company, and international certificates. Please tell us that we guarantee that all the products we produce are good.

Q1.How many days for delivery?

A: Stock with 7 days. Standard sized within 1 month. The specific delivery time depends on your quantity.

Q2. What is your terms of delivery?

A: EXW, FOB, CFR, CIF, DAP, DDP

Q3.Will you send me a free sample?

A:Yes, we'd love to.Can you pay for the delivery?

Q4.What is the advantage of your company?

A:We are a professional state owned manufacturer and exporter, which have nearly 30 years of production experience and exporting experience to mainly Europe and USA market .

Q5: What is your terms of payment?

A: Payment<=1000USD, 100% in advance. Non-standard size ,or Payment>=1000USD, 30% T/T in advance,
Balance before shippment.

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