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

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

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.            

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.            

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.

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

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

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

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

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

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

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