Tools Makers Knife Edges. These knife edges are manufactured from 100 mm to 500 mm length as per IS 3512:1966. Intended for very accurate work, these have one working edge, which is bevelled and very slightly rounded off. The working edge is finished either by grinding or lapping. We make use of high grade alloy steel in hardened form to design these edges. Further, our Knife edges are suitably heat treated to remove internal stress. Our Tool Maker’s knife edges are supplied with computerized calibration certificate traceable to National Physical Laboratory (NPL, Govt Of India ) New Delhi.
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Standard Size and accuracy of Luthra Knife Tool Maker Edges as per IS 3512:1966, Grade 1:
| Dimensions LXBXH mm | Straightness um | |
| 100 X40X 10 | 3 | |
| 150 X 40 X 10 | 3 | |
| 300 X 60 X 12 | 4 | |
| 450 X 60 X 12 | 5 | |
| 500 X 60 X 12 | 5 |