Twist Drills Flashcards
1
Q
A twist drill is mainly made up of these 3 things
A
Shank, Neck, Body
2
Q
The Body of a twist drill has material removed called
A
Flutes
3
Q
The ___ are the material not removed on the body.
A
Lands
4
Q
The ______ sticks out the edge of the lip and runs up the leading edge of the lands.
A
Margin
5
Q
General Purpose angle of drills
A
118
6
Q
4 common drill angles
A
60, 90, 118, 135
7
Q
Thin bridge between the lands
A
Web
8
Q
The web and _____ ____ interact to create the ____ ____
A
point angle, chisel edge
9
Q
The margins act as a ____ surface to keep the body centered.
A
Bearing
10
Q
A ____ ____ drill maintain the _____ diameter while increasing drill size.
A
Stepped Shank, Shank
11
Q
A special type of taper
A
Self-Locking
12
Q
Morse Taper was created in
A
1864
