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Supermini & Mini |
| Technical Instructions Threading Recommended number of passes |
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| Vmax m/min | Steel (N/mm2 Tensile strength) |
Stainless steel | Grey cast iron | Al | ||||
| 400-500 | 500-700 | 700-850 | 850-1150 | > 1150 | ||||
| 160 | 140 | 120 | 90 | 70 | 90 | 100 | 300 | |
| Pitch | Number of passes | ||||||||
| Steel (N/mm2 Tensile strength) |
Stainless steel | Grey cast iron | Al | ||||||
| mm | Gg/" tpi |
400-500 | 500-700 | 700-850 | 850-1150 | > 1150 | |||
| 0.8 | 32 | 10 | 10 | 12 | 12 | 14 | 14 | 12 | 10 |
| 1.0 | 24 | 13 | 13 | 15 | 15 | 18 | 18 | 15 | 13 |
| 1.25 | 20-19 | 16 | 16 | 19 | 19 | 22 | 22 | 19 | 16 |
| 1.5 | 16 | 20 | 20 | 23 | 23 | 27 | 27 | 23 | 20 |
| 1.75 | 14 | 23 | 23 | 27 | 27 | 31 | 31 | 27 | 23 |
| 2.0 | 12-11 | 27 | 27 | 30 | 30 | 36 | 36 | 30 | 27 |
| 2.5 | 10 | 33 | 33 | 38 | 38 | 45 | 45 | 38 | 33 |
| 3.0-3.5 | 8 | 40 | 40 | 46 | 46 | 54 | 54 | 46 | 40 |
The recommended number of passes in the above table are approximate figures. Please note: - to avoid breakages at the cutting edge, the depth of cut at the first pass should not be too deep - finishing passes (with zero depth of cut) are not considered in the table |
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| Feed direction internal threading |
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| In-Feed |
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Radial In-Feed Metal removed on both sides of the insert simultaneously. The most commonly used method for thread production. |
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Modified flank in-feed Less wear of the trailing edge and better surface finish on corresponding flank. |
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Alternating flank in-feed Both edges are being fully utilized which means longer tool life. |
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Flank in-feed More easily formed chip and better heat dissipation. |
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We reserve the right to make technical changes. 