Drilling Flashcards

0
Q

Cutting speed refers to?

A

Peripheral speed

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1
Q

What abbreviation is used to express the feed rate on a drill press?

A

ipr- Inches per revolution.

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2
Q

Which variable is the most important when determining spindle speed?

A

Diameter of the drill

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3
Q

To remove a tapered shank twist drill from the drill spindle, use a?

A

Drill drift

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4
Q

Which type of machine tap will push the chips out ahead of the tap?

A

Spiral point (gun) tap

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5
Q

Which type of machine tap will pull the chips up out of hole?

A

Spiral fluted tap

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6
Q

Which type of machine tap does not clear the chips and may jam and break?

A

Straight fluted tap

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7
Q

Upright drill presses have a power _________ feed.

A

Power “table” feed

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8
Q

What type of drill press is used for drilling large work?

A

Radial arm drill press

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9
Q

The drilling machine that allows quick lowering and raising of the head is the?

A

Radial arm

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10
Q

The size of a sensitive drill press is generally stated by?

A

The distance from the Center of chuck to the column

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11
Q

The operation of opening a hole to an accurate size and good surface finish is the definition for?

A

Reaming

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12
Q

When a tapping operation is performed under power in a drill press a __________ is used.

A

Tapping attachment

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13
Q

A sensitive drill press has _______ feed only

A

Hand

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14
Q

A general-purpose drill for drilling most metals has an included-point angle of?

A

118 degrees

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15
Q

The three main parts of a drill bit are?

A

Point, shank and body

16
Q

When counterboring, the speed selected should be approximately __________ that used for drilling.

A

1/4

17
Q

The thickness of the web of a twist drill:

A

Increases from point to shank

18
Q

Name three things flutes of a drill do?

A
  • admit cutting fluid
  • form the cutting edges
  • allow chips to exit
19
Q

A #27 drill, as compared with a #26 drill is?

A

Smaller in diameter

20
Q

The twist drill set that contains drill sizes that range from 0.234” to 0.413” in diameter is the:

A

Letter set

21
Q

The size of a twist drill should be measured over the:

A

Margins

22
Q

When drilling large holes you should start by?

A

Drilling a pilot hole

23
Q

Excessive drilling speed will cause what to the drill bit?

A

The edges of the margins and chisel point to break down

24
Q

The included point angle of a countersunk hole for most flathead screws is

A

82 degrees

25
Q

What variable is most important when determining spindle speed?

A

Diameter of the drill

26
Q

The lip relief (clearance) angle on a drill should be?

A

8-12 degrees