Countersinking Essay

Question 1

What are the benefits of countersinking

Answer 1

Make faster head flush to surface for aero
Weight saver

Question 2

When do you dimple

Answer 2

When the material is thin

Question 3

What is knife edging

Answer 3

When you go through the depth of the material with the countersink

Question 4

What is the straight shank for on a countersink

Answer 4

To attach it to a drill

Question 5

What are the countersink angles

Answer 5

82
100
120

100 is the most common

Question 6

What is a standard countersink tool

Answer 6

Plain countersink
No setting so hard to cut correct depth
Have countersinks with one, three or multiple cutting lips

Question 7

What is a standard countersink with pilot

Answer 7

Same as standard countersink
Has a pilot pin to guide countersink into material

Question 8

What is a micro stop countersink

Answer 8

Has a removable cutter
Most efficient
Controls the depth and keeps cutter 90 perpendicular to material
82, 100 and 120 cutters available

Question 9

Parts of a micro stop countersink tool

Answer 9

Barrel
Locking ring
Skirt
Cutter
Pilot

Question 10

How much smaller should the pilot pin be then the hole

Answer 10

0.002 in smaller then the diameter of the hole

Question 11

What is a back countersink tool

Answer 11

For Inacsessanle holes
Has a pilot rod and countersink cutter
Rod must be slightly smaller then hole