Products
Rolled Steel Balls
The major advantage of precision ball rolling, compared with traditional forging methods, is the uninterrupted grain flow. Grinding balls are rolled from selected carbon and alloy steels, produced to a customer’s precise specifications.
A special feature of The Steel Ball Company’s manufacturing process is the computerised quench facility, giving uniform surface hardness and controlled cross-sectional hardness essential for very even wear.
Specifications:
- Rolled direct from round bar, followed by in-line heat treatment and uniform quenching, tailored to give even hardness throughout.
- Hardness: ranging up to and including 739 Brinell.
- Ball sizes: 10 diameters available, from 16 mm to 70 mm.
- Other sizes may be available on request, subject to volume and lead time.
Nominal ball dia. mm | Approx. mass per ball g | Approx. surface area mm² | Average number of balls/m³ | Average number of balls/t (1000 kg) | |
---|---|---|---|---|---|
16 | 17 | 805 | 274999 | 59374 | |
20 | 33 | 1257 | 140795 | 30400 | |
22 | 44 | 1521 | 105782 | 22840 | |
25 | 64 | 1964 | 72087 | 15565 | |
30 | 111 | 2829 | 41717 | 9007 | |
40 | 263 | 5029 | 17599 | 3800 | |
50 | 514 | 7857 | 9011 | 1946 | |
60 | 888 | 11314 | 5215 | 1126 | |
65 | 1129 | 13279 | 4101 | 886 | |
70 | 1410 | 15400 | 3284 | 709 |
Forged Steel Balls
The Steel Ball Company’s forged steel balls are essentially for semi-autogenous and primary milling, where balls over 70 mm diameter are required for impact grinding.
Specifications:
- Hammer forged from selected carbon and alloy steels.
- Hardness: maximum 500 Brinell.
- Ball sizes: 6 diameters available, from 75 mm to 150 mm.
- Other sizes may be available on request.
Nominal ball dia. mm | Approx. mass per ball g | Approx. surface area mm² | Average number of balls/m³ | Average number of balls/t (1000 kg) | |
---|---|---|---|---|---|
75 | 1735 | 17679 | 2670 | 576 | |
80 | 2105 | 20114 | 2200 | 475 | |
90 | 2998 | 25457 | 1545 | 334 | |
100 | 4112 | 31429 | 1126 | 243 | |
120 | 7105 | 45257 | 652 | 141 | |
150 | 13878 | 70714 | 334 | 72 |