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The below table displays different steel balls material names in different countries:

 

Comparison Table of Steel Balls Materials
Country / Standard		Chrome Steel Balls	Carbon Steel Balls				Stainless Steel Balls
America	AISI	52100	1010	1015	1045	1085	302	304	316	420	440C
China	YB	GCr15	10	15	45	85	1Cr18Ni9	0Cr19Ni9	0Cr17Ni12Mo2	3Cr13	9Cr18
Japan	JIS	SUJ2	S9CK	S15CK	S45C	SUP3	SUS302	SUS304	SUS316	SUS420J2	SUS440C
Germany	DIN	100Cr6	CK10	CK15	CK45		X12CrNi188	X5CrNi189	X5CrNiMn18	X30Cr13
		1.3505					1.4300	1.4301	1.4401	1.4028

 

The below table displays the Steel Balls Grade Standards:

 

Steel Balls Diameter Tolerance Grade Standard
Grade	Diameter variation	Spherical deviation	Surface roughness	Batch diameter variation	Basic diameter tolerance
	Vdws	△sph	Ra	Vdwl	Tdn
	Not More Than
	μm
10	0.25	0.25	0.025	0.5	*
16	0.4	0.40	0.032	0.8	*
20	0.5	0.50	0.04	1	*
28	0.7	0.70	0.05	1.4	*
40	1.0	1.00	0.08	2	*
60	1.5	1.50	0.10	3	*
100	2.5	2.50	0.125	5	+/-12.5
200	5	5	0.2	10	+/-25
500	13	13	*	25	+/-50
1000	25	25	*	50	+/-125
* It means not applicable

 

Steel Balls Batch Diameter Variation Commonly Used Gauge Values & Subdivision Gauge Values
Grade	Batch Diameter Variation	Vertical Spacing	Commonly Used Gauge Values	Subdivision Gauge Values	Subdivision Gauge Values
	μm
10	0.5	1	-9,...,-1,0,+1,...+9	0.2	-0.4,-0.2,0,+0.2,+0.4
16	0.8	2	-10,...,-2,0,+2,...+10	0.4	-0.8,-0.4,0,+0.4,+0.8
20	1	2	-10,...,-2,0,+2,...+10	0.4	-0.8,-0.4,0,+0.4,+0.8
28	1.1	2	-12,...,-2,0,+2,...+12	0.4	-0.8,-0.4,0,+0.4,+0.8
40	2	4	-16,...,-4,0,+4,...+16	0.8	-1.6,-0.8,0,+0.8,+1.6
60	3	5	-20,...,-5,0,+5,...+20	1	-2,-1,0,+1,+2

 

The conversion formula between the weight and quantity of steel balls：

 

Balls Diameter	Weight of 10,000 Balls(KG)	How many Balls per 1 KG	Balls Diameter	Weight of 1000 Balls(KG)	How many Balls per 1 KG	Balls Diameter	Weight of 1000 Balls(KG)	How many Balls per 1 KG
0.5mm	0.0051	1960780	8mm	2.09	478	20.637mm 13/16 inch	35.80	27.90
0.68mm	0.0128	781250	8.5mm	2.50	400	21mm	37.75	26.49
0.8mm	0.0209	478470	8.731mm 11/32 inch	2.71	369	21.4313mm 27/32 inch	40.10	24.90
1mm	0.0408	245100	9mm	2.97	337	22.225mm 7/8 inch	44.80	22.30
1.2mmm	0.0705	141840	9.525mm 3/8 inch	3.52	284	23mm	49.59	20.17
1.3mm	0.0893	111980	10mm	4.08	245	23.0188mm 29/32 inch	49.80	20.10
1.45mm	0.124	80645	10.3188mm 13/32 inch	4.48	223	23.8125mm 15/16 inch	55.10	18.20
1.588mm 1/16 inch	0.16	62350	11mm	5.42	185	24mm	56.34	17.75
1.75mm	0.218	45871	11.1125mm 7/16 inch	5.60	179	24.6063mm 31/32 inch	60.80	16.50
2mm	0.326	30700	11.5mm	6.22	161	25mm	63.68	15.70
2.3812mm 3/32 inch	0.550	18182	11.5094mm 29/64 inch	6.22	161	25.4mm 1 inch	66.80	15.00
2.5mm	0.637	15698	11.9062mm 15/32 inch	6.88	145	26.1938mm 11/32 inch	73.30	13.64
3mm	1.100	9091	12mm	7.04	142	26.9875mm 11/16 inch	80.20	12.47
3.175mm 1/8 inch	1.310	7634	12.3031mm 31/64 inch	7.60	132	27.7812mm 13/32 inch	87.40	11.40
3.5mm	1.750	5717	12.7mm 1/2 inch	8.35	120	28mm	89.47	11.18
3.969mm 5/32 inch	2.550	3922	13.4938mm 17/32 inch	10.00	100	28.575mm 1-1/8 inch	95.20	10.50
4mm	2.610	3831	14mm	11.18	89	30.1625mm 1-3/16 inch	112.00	8.93
4.7625mm 3/16 inch	4.410	2268	14.2875mm 9/16 inch	11.90	84	31.75mm 1-1/4 inch	130.60	7.66
5mm	5.100	1961	15.0812mm 19/32 inch	14.00	71.40	33.3375mm 1-5/16 inch	151.10	6.62
5.1594mm 13/64 inch	5.600	1786	15.875mm 5/8 inch	16.30	61.30	34.925mm 1-3/8 inch	173.80	5.75
5.5562mm 7/32 inch	6.990	1431	16mm	16.69	59.90	36.5125mm 1-7/16 inch	198.60	5.04
5.9531mm 15/64 inch	8.600	1163	16.6688mm 21/32 inch	18.90	52.90	38.1mm 1-1/2 inch	225.60	4.43
6mm	8.810	1136	17mm	20.02	50.00	40mm	261.10	3.83
6.35mm 1/4 inch	10.400	962	17.4625mm 11/16 inch	21.70	46.10	41.275mm 1-5/8 inch	286.80	3.49
6.5mm	11.190	894	18.2562mm 13/32 inch	24.80	40.30	42.8625mm 1-11/46 inch	321.20	3.11
6.7469mm 17/64 inch	12.500	800	19mm	27.96	35.77	44.45mm 1-3/4 inch	358.20	2.79
7.1438mm 9/32 inch	14.900	671	19.05mm 3/4 inch	28.20	35.50	47.625mm 1-7/8 inch	440.60	2.27
7.9375mm 5/16 inch	20.400	490	19.9438mm 25/32 inch	31.90	31.40	50.8mm 2 inch	534.70	1.87

 

How many steel balls per 1 KG?

What is the weight of 1000 steel balls?

What is the weight of 10000 steel balls?

How to calculate the number of steel balls in 1 KG at a certain size?

How to calculate the weight of steel balls based on the number of pieces?

 

This conversion table is applicable to steel balls of multiple materials includes

stainless steel balls,chrome steel balls, carbon steel balls, etc.

Stainless Steel Balls AISI 304/316/316L/420/440C.

Chrome Steel Balls AISI 52100 / DIN 100Cr6.

Carbon Steel Balls AISI 1010/1015/1045/1085.

 

This table is not applicable to balls made of special materials, such as

aluminum balls, copper balls, glass balls, and ceramic balls.

 

 

In the procurement of steel balls, in order to ensure the accuracy of product requirements,

it is necessary to provide as many detailed requirements as possible,

such as material name, chemical analysis, hardness, grade requirements,

diameter tolerance, batch diameter tolerance, roundness requirements, etc.

Different uses have different material requirements,

Different uses have different grade requirements.

For any technical support, please contact SOYA Steel Ball Factory.

 

 

How is the steel balls produced?

 

 

 

How is the steel balls produced?

The steel balls production process is divided into several processes,

they are wire drawing, cold heading, coarse grinding, heat treatment,

soft grinding, hard grinding, lapping, superfinishing, polishing, etc.

 

Wire Drawing: Stretch the raw material steel wire to the required diameter size;

 

Cold Heading: Forging the steel wire into irregular spheres;

 

Coarse Grinding: Grind off the burrs and irregular surfaces of the steel balls,

make the steel balls more circular;

 

Soft Grinding: On the basis of roundness, make the size of the steel balls more precise;

 

Heat Treatment: By carburizing treatment, increase the hardness of the steel balls;

 

Hard Grinding: Further increase the precision of the steel balls,

make the diameter tolerance more in line with the requirements;

 

Superfinishing: More precise processing and grinding, spending more time

to make the size of the steel balls more precise;

 

Polishing: Make the surface of the steel balls to be more brighter, cleaner, and shinier.

 

Test: Test the steel balls one by one, every steel ball will be detected,

ensure that each steel ball meets the requirements.

 

The steel balls with different grade have different precision requirements.

 

If the precision requirement is low, the production process and time will be reduced.

 

If high precision is required, the production process and time will increase.

 

Different materials will have different production processes.

 

SOYA Steel Ball Factory can customize production according to customer

requirements, with special sizes, special raw materials, and special grade.

 

SOYA Steel Ball Factory can provide various production materials and videos.

Welcome to explore and research together, to explore more precise steel balls.

 

 

 

 

Tell us your balls requirements, the best offer will send you at the first time! E-mail: bevan@soya-steelball.com

 

 

 

 

 

 

 

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