1. Unit 53 Metalwork Technology and Practice
Drilling Machines
Unit 53
Metalwork
Technology and Practice

2. Drill Press
Defined: A machine that holds and turns a drill to cut holes in metal
Drill: A tooling device used for cutting holes.

3. Drill Press Safety (I) Remove Jewelry and eliminate loose clothing.
Wear eye protection.
Be sure the key is removed before turning on the machine.
Turn off the power if work gets caught in the drill.
Adjust the depth stop to avoid drilling into the table.
           

4. Drill Press Safety (II)
Select the proper speed, faster for wood and slower for metal. The larger the bit, the slower the speed.
Work should always be secured with a fastening device.
The right hand operates the feed wheel and the left hand should always be in the secure position.
           

5. Portable Electric and Cordless Drill Safety
Be sure the electric drill is disconnected from the power source before installing bits.
Make sure the bit is sharpened before use.
Make sure the chuck key has been removed before starting the drill
Secure all work before drilling.
Use a center punch to mark a starter hole.

6. Handfeed Drill Press Considered a small press
Small bits can only be used
Can set on a floor or bench top

7. Drill Press Parts Belt Housing Speed Control Switch Spindle and Chuck
Feed Handle
Table
Table Positioning Handle
Column
Base

8. Radial Drill Press Contains a movable arm where the spindle is mounted
The spindle may move and be set at different distances from the post or column
The arm can swing left to right
Used for large heavy work such as machine frames

9. Multiple Spindle Drill Press
Drilling machine that contains multiple spindles fastened to the main spindle
Each holds a drill while all the drills operate at once
Time saving machine

10. Turret Drill Press Multiple spindle turret with 6,8, or 10 spindles
The bits are placed in a spindle and brought into position by indexing
Designed to perform several operation at one machine in a specific order

11. Gang Drill Press Two or more drill presses are ganged
Each spindle can operate alone
Mass production machine

12. Drill Press Parts Define each part and describe its function
Base
Column
Table
T-slots (Base)
T-slots (Table)
Table positioning handle
Table elevating screw
Table Lock
Spindle
Spindle return spring
Quill
Feed Handle
Cone Pulley
Motor
Steps (cone pulley)
Variable speed system
Feed stop
Depth Stop