twist drill DIN 338 HSS-R 3,8 mm

twist drill DIN 338 HSS-R 3,8 mm 
 
Din 338 HSS 
 
Technical Specification: 
Direction: right 
Processed material: Steel 
 
twist drill 
short version 
relieved cone 
rollforged 
 
Size: 3,8
Total length: 75
Working length: 43
 
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.