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Stepped drill bits, type N, HSSE medium quality grade
For 180° cylinder head screws
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Application
According to DIN/ISO 273 and countersinking according to DIN 74, for cylinder head screws according to DIN 912, 6912, 7984 and ISO 1207. Hole and countersink produced in one machining step.
Execution
- profile-ground
Advantage
- precise alignment of drill diameter and countersink diameter, lower process costs
- Special geometry for outstanding centring and positional accuracy
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