1. Drill Press operations and such

2. 1.Name six operations which can be performed on a drill press.
Drilling
Taping
Reaming
Spot facing
Counter-sinking
Boring
Counter boring

3. 2. Define these six operations
1. Drilling; Producing a hole through material.

4. 2 Reaming; Finish drilling a hole accurately.

5. 3. Countersinking; Cutting material for bolt to lay flush.

6. 4. Counter-boring: Recessing bolt completely.

7. 5. Taping; producing threads inside the hole.

8. 6. Spot facing; Flat surfacing for seamless contact with fastener head.

9. 7.Boring; Single wing cutter drilling a hole.

10. 3.List the four main parts of the drill press.
1.Table
4.Column
2.Base
3.Head
4.How is the size of the drill press generally given?
Measure from the column
to the chuck

11. 5. Explain the difference between key and keyless chucks.
Keyed chucks require keys to tighten
Keyless can be tighten by hand
Keyed chuck
Keyless chuck

12. 6. How should a taper shank tool be mounted in a
drill press?
Slide firmly into its holding tube.
A taper fit wedges the shank firmly

13. 7.How should a taper shank tool be removed from a drill press spindle
With the aid of a drift tool.
8.Describe the most common twist drill manufactured
Has two cutting edges called “lips

14. 9.Name three types of materials twist drills are made of.
HSS (High speed steel)
Titanium coated
Carbide

15. 10.Name three main parts of a twist drill
Body
Shank
Flute

16. 11.State the purpose of each part:
(a)Shank / tang (d) body clearance
(b) Flutes (e) web
(c) margin (f) lip clearance
A. Fits into the chuck
B. Provides clearance for chips
C. Raised section of clearance

17. D. Body Clearance ;flutes
E. Web; is the Chiseled edge at the end of the bit
F. Lip clearance; Angle at the end of the bit

18. 12. What is the recommended point angle and lip clearance for general purpose drilling.
8-12 degrees
13.Why is loose clothing, long hair, or jewelry considered hazardous?
Can become caught in the rotation of the machine

19. 14. What is a pilot hole, why is it used?
A hole drilled smaller than required to guide the larger hole in an exact position.
15. Name two methods of measuring the size of a drill bit.
A micrometer.
drill gauge.

20. 16. While drilling a hole, when is it recommended to ease off on the down-ward
Pressure?
Just as or before the drill bit cuts through the material completely.
Sensitive drilling.
17. When should the vise be fastened securely to the table while drilling?
When it becomes necessary to drill a hole larger than ½ in diameter.

22. 18. Determine the cutting speed for a ½ inch high speed drill bit cutting machine steel.
at 100 sfm (surface feet per minute)
Formula = RPM= CS X 4 D
100x4
400
800
RPM = =
1/2 .5

23. The End