39065 ⎘
Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps
Drill Bit and Production Method
#2Method of machining screw
#3Cutting tool with enhanced chip evacuation capability and method of making same
#4Twist drill and production method
#5Twist drill and production method
#6Device for producing a circularly cylindrical body
#7Method and device for producing a circularly cylindrical body, which consists of deformable material, with internally disposed helical recesses