Hole Making Flashcards
1
Q
Which machines for hole making?
A
Drill Press or Lathe
2
Q
Most common drills
A
Twist drills:
Depth of hole no greater than 4 times OD of dril, because chips get stuck in drill
3
Q
center drill/spot drill
A
better starting position for better accuracy on wp
4
Q
Common problems
A
- rotating chisel edge wanders over workpiece in the beginning
- heat and friction
5
Q
Crankshaft drills
A
good for deeper holes –> break up chips easily
6
Q
Types of holes
A
through holes
blind holes
7
Q
Other holemaking operations
A
- counterboring
- countersinking
8
Q
Multiple spindle
A
drilling number of different holes simualtaniously together
9
Q
Gang drilling
A
- number of independent vertical drills in a row
10
Q
Gun drilling
A
deep hole drilling
11
Q
trepanning
A
machines a ring and leaves material in the center of the ring
12
Q
Boring on drill press vs. boring on lathe
A
higher accuracy on lathe
