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~DIN1870 |
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| Manufacturing specifications |
Point grinding: relieved cone Point angle: greater than standard (130º) Web thinned: to DIN 1412, form A Helix angle: greater than standard Web thickness: considerably greater than standard Web taper: none Flute form: very wide flutes with special "rolled-off" heels Tolerance on diameter: h8 Oil feed: axially through Morse taper shank Shank: lengthened Flute length to DIN 1870, series 1. Other manufacturing specifications to DIN 1414. |
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| Range of applications |
For horizontal, oblique and inverted drilling operations, especially for hole depths exceeding 5 times the drill diameter. For drilling cast steel, cast iron, stainless steel, acid and heat resistant steels with a tensile strength above 800 N/mm˛ up to 1300 N/mm˛. There is an excellent tool life resulting from the high heat resistance. The large flute section and increased helix angle improve the swarf evacuation to such an extent that even deep holes do not normally require drill withdrawal. Suitable for drilling with drill bushings. |
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| Sketch | 
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Cutting direction | Surface | 
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