GSR metal-twist-drill tap-hole-drill DIN338 HSSR roll-forged 03440

twist drill DIN 338 HSS-R 7,8 mm

1,21€

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Delivery time (DE): 2-3 business days

Art.-Nr.: 03440078
EAN: 4014176087068

twist drill DIN 338 HSS-R 7,8 mm

Din 338 HSS

Technical Specification:
Direction: right
Processed material: Steel

twist drill
short version
relieved cone
rollforged

Size: 7,8
Total length: 117
Working length: 75

Drilling is a separation process to create round holes into a
material through chip removal. A distinction is made between
blind hole drillings and through hole drillings. A core hole must
be bored to cut a thread into the hole. Core holes have specific
sizes which correspond to the taps. You can find these sizes in
each tap table as it’s absolutely necessary to stick to it.

Twist drills have a side rake angle (also called twist angle) of 27°, a
point angle of 118° or 135° and a cylindrical shank. The finish “Type
N” is suitable for normal cutting materials. A distinction is made
between roll forged and fully ground twist drills.

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twist drill DIN 338 HSS-R 7,8 mm

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