Drilling machines and Drilling

When using a drill press, which guideline for speed is correct?

• Use fast speed for large holes; slower speed for small holes.

• Use slow speed for large holes; faster speed for small holes.

• Use a uniformly fast speed.

• Use a uniformly slow speed.

Power from the motor of the sensitive drill press is transmitted to the ___________through the belt drives.

• Spindle

• Headstock

• Head

• None of these

The following are materials used to make twist drills EXCEPT ______________.

• carbon steel

• stainless steel

• carbon steel

• tungsten carbide

Which following type of drill press is used to drill very large pieces?

• Microdrill press

• Sensitive drill press

• Magnetic based drilling machine

• Radial arm drill press

Drill press size is determined by ____________.

• The largest drill that will fit the machine.

• The largest piece of work that will fit on the table

• The largest diameter work that can be drilled on center

• None of these

Drill flutes are used to

• Help form the cutting edge of the drill point

• Curl the chips for easier removal

• Form channels through which the chips can escape

• All of these

Two types of twist drills are?

• Straight Shank, Taper Shank

• Taper Shank, Countersink

• Flat drill, Slocombe

• Centre drill, Countersink

The depth to which the drill will advance in the work is controlled by the

• Dept micrometer

• Rack and pinion

• Spindle

• Depth Stop

The point angle for a general purpose twist drill is ____.

• 90 degrees

• 118 degrees

• 130 degrees

• 140 degrees

The chisel edge of the twist drill is used to ____________.

• Form the cutting edge.

• Provide the right angle

• Peirce through the metal being cut

• Give the drill strength