Wrought iron, hand forged steel grinding balls and rods - est 1864 F. J. Brindley and Sons (Sheffield) Ltd.
Central Hammer Works, Acres Hill Lane, Darnall, Sheffield S9 4LR
Telephone: +44(0)114 244 9663 Fax: +44(0)114 243 5112

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Hand Forged Steel Grinding Balls


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The size and quality of Hand Forged Steel Balls to be used depends upon:

  • Size and type of mill
  • Physical characteristics of the material to be ground
  • Size of finished product required

Hand Forged Steel Grinding Balls
Hand Forged Steel Grinding Balls

Grinding balls are available in sizes from 19mm to 150mm diameter, In the 'As Forged' Condition Brinell hardness 260/310.
'Heat treated' condition 19mm to 65mm Hardness up to 700 Brinell, 70mm to 100mm Hardness 400/500 Brinell,
Typical analysis : Car. 07/.09% Mn .07/.09%.

Carbon Chrome En 31: 25mm to 150mm Hardness 300/400 Brinell,
Typical analysis: Car 90/1.20% Mn. 30/75 Chr. 90/1.6%.

Bearing in mind forging tolerance the approximate weights and measurements of steel balls are as follows:
Size
mm
(ins)""
Weight per Ball Kgs
No per metric Tonne
(1000Kgs)
Surface Area
in Square mm
19mm
(.75)
0.0284
35,211
1,134
25mm
(1)
0.0673
14,858
1,964
30mm
(1.25)
0.1314
7,610
2,828
40mm
(1.5)
0.2271
4,403
5,028
50mm
(2)
0.5384
1,857
7,857
60mm
(2.25)
0.9012
1,109
11,314
65mm
(2.5)
1.0514
951
13,278
70mm
(2.75)
1.3993
714
15,399
75mm
(3)
1.8171
550
17,678
80mm
(3.25)
2.0534
486
20,113
90mm
(3.5)
2.8853
346
25,456
100mm
(4)
4.3068
232
31,428
115mm
(4.5)
6.1325 
163
41,563
120mm
(4.75)
7.2121
138
45,256
125mm
(5)
8.4096
118
49,106
133mm
(5.25)
9.7386
102
55,592
140mm
(5.5)
11.1946
89
61,598
150mm
(6)
14.5331
68
70,713
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