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Drill S & R GM medium length standard Din 338 for drilling through and blind holes in the cast iron, nonferrous metals, plastics, structural and tool steel Hardness 250 Bhn.
In the production technology of precision drill used vyshlifovyvaniya working profile and a special heat treatment technique to provide maximum strength and stiffness.
The drill made of high speed steel with sharpening along a conical surface.
8. Accuracy h
Drill according to S & R GM metal suitable for hand drills and other drilling equipment.