PreQ ESD - 2.5 Drilling metal

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10 Terms

1
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Jobber bit ingredient

HSS

2
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Straight shanked drill bit

Held in the pillar drill chuck, used in drill bits under 13mm

3
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Tapered shank drill bit

Held in the pillar drill spindle, used in drill bits larger than 13mm as it locks in the spindle and cannot slip under pressure

4
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<p>What is a</p>

What is a

Locking device

<p>Locking device</p>
5
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<p>What is b</p>

What is b

Locking spindle

<p>Locking spindle</p>
6
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Pilot hole

By drilling with a smaller drill bit to help guide the larger drill bit to the right location, as well as preventing cracks

7
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Depth stop

Guard that prevents the drill bit below a certain depth

8
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Countersink bit ingredients

HSS

9
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Cone bit use

Cutting and enlarging holes in thin sheet metal

10
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Hand vice use

To safely hold thin metal while being drilled

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