| Size of Burr Material |
0.125"/3mm |
0.250"/6mm |
0.375"/10mm |
0.500"/13mm |
0.625"/16 mm |
| Aluminium, alloys, plastics |
30,000 to 90,000 |
15,000 to 17,000 |
10,000 to 50,000 |
7,000 to 38,000 |
6,000 to 30,000 |
| (including hard, industrial), |
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| Base alloys, glass fibre |
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| Brass, cast iron, copper, |
45,000 to 90,000 |
22,500 to 60,000 |
15,000 to 40,000 |
11,000 to 30,000 |
9,000 to 24,000 |
| Bronze |
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| Unhardened steel |
60,000 to 90,000 |
45,000 to 60,000 |
30,000 to 40,000 |
22,500 to 30,000 |
18,000 to 24,000 |
| Ceramics, hardened alloy |
60,000 to 90,000 |
30,000 to 45,000 |
19,000 to 30,000 |
15,000 to 22,500 |
12,000 to 18,000 |
| Steels, nimonic alloys, stainless |
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| Steel, titanium |
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