Frequently Asked Question

What is the weight of a loose ball?  What is the individual weight of a steel ball? What is the weight on one steel ball bearing?

Dia mm	Dia Imperial	Dia Decimal	kg / 1000 pieces	weight each kg	quanity / kg	Min crushing load KG
0.2	0.00787	0.00003263	3.263E-07	30,646,644	5
0.25	0.00984	0.00006373	6.373E-07	15,691,197	7
0.3	0.0118	0.000101	0.00000101	9,900,999	10
0.397	1/64	0.01562	0.000255	0.00000255	3,846,153	16
0.4	0.01575	0.000261	0.00000261	3,831,418	17
0.5	0.01968	0.00051	0.0000051	1,960,784	25
0.508	0.020	0.000535	0.00000535	1,869,158	26
0.6	0.236	0.000881	0.00000881	1.135.074	34
0.635	0.025	0.001044	0.00001044	957,854	38
0.7	0.0275	0.001399	0.00001399	714,796	45
0.794	1/32	0.0312	0.00204	0.0000204	490,196	57
08	0.0315	0.002088	0.00002088	478,927	58
1	0.0397	0.004079	0.00004079	245,158	85
1.19	3/64	0.0469	0.006884	0.00006884	145,264	117
1.2	0.0472	0.007048	0.00007048	141,884	118
1.5	0.0591	0.01377	0.0001377	72,622	176
1.588	1/16	0.0625	0.01632	0.0001632	61,275	195
1,984	5/64	0.0781	0.03187	0.0003187	31,377	289
2	0.0787	0.03263	0.0003263	30,647	293
2.381	3/32	0.0937	0.05507	0.0005507	18,159	400
2.5	0.0984	0.06373	0.0006373	15,691	436
2.778	7/64	0.1093	0.08746	0.0008746	11,434	525
3	0.1181	0.1101	0.001101	9,083	602
3.175	0.125	0.1305	0.001305	7,663	666
3.5	13.1378	0.1749	0.001749	5,717	792
3.572	9/64	0.1406	0.1859	0.001859	5,379	820
3.969	5/32	0.1562	0.255	0.00255	3,922	990
4	0.1575	0.261	0.00261	3,831	1000
4.366	11/64	0.1719	0.3394	0.003394	2,946	1170
4.5	0.1771	0.3716	0.003716	2,691	1240
4.763	3/16	0.1875	0.4406	0.004406	2,269	1370
5	0.1968	0.5099	0.005099	1,961	1490
5.5	0.2165	0.6786	0.006786	1,473	1760
5.556	7/32	0.2187	0.6996	0.006996	1,429	1800
5.593	15/64	0.2343	0.8605	0.008605	1,162	2020
6	0.2362	0.881	0.00881	1,135	2060
6.35	1/4	0.250	1.044	0.01044	958	2280
6.5	0.2559	1.12	0.0112	892	2370
6.747	17/64	0.2656	1.253	0.01253	798	2535
7	0.2756	1.399	0.01399	714	2700
7.144	9/32	0.2812	1.487	0.01487	672	2810
7.5	0.2952	1.721	0.01721	581	3050
7.538	19/64	0.2968	1.749	0.01749	571	3080
7.938	5/16	0.3125	2.04	0.0204	490	3380
8	0.3149	2.088	0.02088	478	3420
8.5	0.3346	2.505	0.02505	399	3800
8.73	11/32	0.3437	2.715	0.02715	368	4000
9	0.3543	2.973	0.02973	336	4225
9.128	23/64	0.3594	3.102	0.03102	322	4330
9.5	0.3740	3.497	0.03497	286	4650
9.525	3/8	0.375	3.525	0.03525	283	4670
9.92	25/64	0.3906	3.983	0.03983	251	5020
10	0.3937	4.079	0.04079	245	5090
10.318	13/32	0.4062	4.481	0.04481	223	5380
11	0.4330	5.429	0.05429	184	6030
11.112	7/l6	0.4375	5.597	0.05597	178	6140
11.5	0.4527	6.203	0.06203	161	6525
11.509	29/64	0.4531	6.219	0.06219	160	6530
11.906	15/32	0.4687	6.884	0.06884	145	6940
12	0.4724	7.048	0.07048	141	7030
12.303	31/64	0.4843	7.596	0.07596	132	7350
12.70	1/2	0.500	8.355	0.08355	119	7780
13	0.5118	8.961	0.08961	111	8100
13.494	17/32	0.5312	10.02	0.1002	99.8	8660
14	0.5512	11.19	0.1119	89.4	9240
14.288	9/16	0.5625	11.9	0.119	84	9590
15	0.5905	13.77	0.1377	72.6	10500
15.081	19/32	0.5937	13.99	0.1399	71.5	10600
15.875	5/8	0.625	16.32	0.1632	61.3	11600
16	0.6299	16.7	0.167	59.9	11700
16.668	21/32	0.6562	18.89	0.1889	52.9	12600
17	0.6693	20.04	0.2004	49.9	13040
17.462	11/16	0.6875	21.72	0.2172	46	13700
18	0.7086	23.79	0.2379	42	14440
18.256	23/32	0.7187	24.82	0.2482	40.3	14800
19	0.7480	27.96	0.2796	35.7	15890
19.050	3/4	0.7500	28.2	0.282	35.5	16000
19.843	25/32	0.7812	31.87	0.3187	31.4	17200
20	0.7874	32.63	0.3263	30.6	17400
20.637	13/16	0.8125	35.85	0.3585	27.9	18400
21	0.8267	37.77	0.3777	26.5	18970
21.431	27/32	0.8437	40.15	0.4015	24.9	19700
22	0.8661	43.43	0.4343	23	20610
22.225	7/8	0.8750	44.78	0.4478	22.3	21000
23	0.9055	49.63	0.4963	20.1	22300
23.020	29/32	0.9063	49.75	0.4975	20.1	22300
23.813	15/16	0.9375	55.07	0.5507	18.2	23700
24	0.9448	56.39	0.5639	17.7	24040
24.607	31/32	0.9687	60.77	0.6077	16.5	25100
25	0.9842	63.73	0.6373	15.7'	25900
25.4	1	1.000	66.84	0.6684	14.9	26600
26	1.0236	71.69	0.7169	13.9	27700
26.988	1-1/16	1.0625	80.17	0.8017	12.5	29600
28	1.1023	89.54	0.8954	11.2	31600
28.575	1-1/8	1.1250	95.17	0.9517	10.5	32800
30	1.1811	110.1	1.101	9.06	35700
30.163	1-3/16	1.1875	111.9	1.119	8.94	36100
31.750	1-1/4	1.2500	130.5	1.305	7.66	39500
32	1.2598	133.7	1.337	7.48	40050
33.338	1-5/16	1.3125	151.1	1.511	6.62	43100
34	1.3385	16.03	0.1603	6.24	44590
34925	1-3/8	1.3750	17.38	0.1738	5.75	46800
35	1.3779	17.49	0.1749	5.72	46940
36	1.4173	19.03	0.1903	5.25	49350
36.513	1-7/16	1.4375	19.85	0.1985	5.04	50600
38	1.4960	22.38	0.2238	4.47	54300
38.10	1-1/2	1.500	22.56	0.2256	4.43	54600
39.688	1-9/16	1.5625	25.5	0.255	3.92	58670
40	1.5748	26.1	0.261	3.83	59490
41.275	1-5/8	1.625	28.68	0.2868	3.48	62900
42.863	1-11/16	1.6875	32.12	0.3212	3.11	67240
44.45	1-3/4	1.7500	35.82	0.3582	2.79	71700
45	1.7716	37.17	0.3717	2.69	73300
46.038	1-13/16	1.8125	39.8	0.398	2.51	76330
47.625	1-7/8	1.8750	44.06	0.4406	2.27	81100
49.213	1-15/16	1.9375	48.61	0.4861	2.06	85900
50	1.9685	50.99	0.5099	1.96	88360
50.80	2	2.0000	53.47	0.5347	1.87	90900
53.975	2-1/8	2.1250	64.14	0.6414	1.58	101150
55	2.1653	67.86	0.6786	1.47	104620
57.150	2-1/4	2.250	76.13	0.7613	1.31	112000
60	2.3622	88.1	0.881	1.13	122000
60.325	2-3/8	2.375	89.54	0.8954	1.12	123250
63.500	2-1/2	2.500	104.44	1.0444	0.96	135000
65	2.5590	112.01	1.1201	0.89	140690
66.675	2-5/8	2.625	120.9	1.209	0.83	147190
69.850	2-3/4	2.750	139.01	1.3901	0.72	159800
70	2.7559	139.9	1.399	0.71	160450
73.025	2-7/8	2.875	158.84	1.5884	0.63	172950
75	2.9527	172.07	1.7207	0.58	181330
76.200	3	3.0000	180.47	1.8047	0.55	186500
79.375	3-1/8	3.125	203.98	2.0398	0.49	200500
80	3.1496	208.83	2.0883	0.47	203300
82.550	3-1/4	3.250	229.44	2.2944	0.43	214900
85.725	3-3/8	3.375	256.95	2.5695	0.39	209800
88.900	3-1/2	3.50	286.57	2.8657	0.35	245100
90	3.5433	297.34	2.9734	0.33	250500
92.075	3-5/8	3.625	318.39	3.1839	0.31	260860
95.250	3-3/4	3.750	352.47	3.5247	0.28	277000
98.425	3-7/8	3.875	388.91	3.8891	0.25	293600
100	3.937	407.88	4.0788	0.24	301990
101.60	4	4.0000	427.77	4.2777	0.23	309500
107.95	4-1/4	4.250	513.1	5.131	0.19	345850
110	4.3307	542.89	5.4289	0.18	357500
114.30	4-1/2	4.500	609.08	6.0908	0.16	382700
120	4.7244	704.82	7.0482	0.14	417200
120.65	4-3/4	4.750	716.3	7.163	0.14	421250
127	5	5.0000	835.44	8.3544	0.12	461350
139.70	5-1/2	5.50	1112.44	11.1244	0.09	546290
150	5.905	1376.6	13.766	0.07	619730
152.40	6	6.0000	1443.67	14.4367	0.06	637400

The weights shown are based on chrome alloy steel balls, approximate weights for other materials can be
obtained by multiplying the weight per 1000 balls by the following figures.

Material	Mulitplier
Carbon Steel	1.004
Stainless Steel AISI 420/440	0.979
AISI 302/304	1.011
AISI 316	1.025
Phosphor Bronze	1.149
Brass	1.074
Aluminium	0.343
Duralumin	0.357
Tungsten Carbide	1.907
Glass/Steatite	0.344
Nylon	0.146
Delrin	0.181
Polypropylene	0.115
Polyurethane	0.162
Teflon (PTFE)	0.276
Ceramic	0.487
Silicon Nitride	0.408

weights weights weights weights weights weights weights weights weights weights weights weights weights weights weights
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individually individually individually individually individually individually individually individually individually individually
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