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M7 > 7.3 > Flashcards

7.3 Flashcards

(49 cards)

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1
Q

When can you scribe something

A

For cut lines only

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2
Q

What are hammers classified by

A

Weight and type (with handle removed)

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3
Q

What should you check before using a claw hammer

A

That the head is set using attached to the handle

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4
Q

What size centre punches are there

A

60% for light work
90% for general indentation

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5
Q

What are the four types of hammers

A

Ball pein
Cross and Straight pien
Claw hammer
Copper and hide hammer

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6
Q

What are the 7 parts of a hammer

A

Neck
Face
Bell
Claw
Cheek
Handle
Grip

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7
Q

How should the teeth of a hacksaw lay

A

For a normal hacksaw - teeth away from you
For junior - teeth facing the handle

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8
Q

What is the kerf and why do we have it

A

The teeth are set alternately left and right to produce the kerf
Which reduces jamming as makes a clearance

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9
Q

What are the three types of blades we can have on a hacksaw

A

Coarse
Medium
Fine

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10
Q

When would we use a coarse hacksaw

A

For soft materials

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11
Q

When would we use a medium hacksaw

A

For normal general

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12
Q

When would we use a fine hacksaw

A

For hard materials/sheet metal/ cut hollows or tubing

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13
Q

What do you use a round file for

A

For small radii

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14
Q

What do you use a half round file for

A

For filling medium or large radii

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15
Q

What do you use a square file for

A

For filing keyways

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16
Q

What do you use to clean files

A

Scratch card/file brush
Or alternatively, chalk, oil or white spirit

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17
Q

What is the purpose of draw filling

A

Very fine finishes

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18
Q

What is the purpose of a flute of a drill bit

A

Allows removals of the chips/swarf
Allows cutting fluid to reach the cutting lips

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19
Q

When should you use an extension drill and what needs to be paired with it

A

Only use if absolutely necessary
Use a drill guard

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20
Q

What are the general angles for a drill

Study These Flashcards
A

Inclusive angle = 118 degrees
Cutting lip = 59 degrees

21
Q

What are the cutting angles for a drill bit when used on hard materials

Study These Flashcards
A

140 degrees
70 degree cutting lip

22
Q

What are the cutting angles for a drill bit when used on soft materials

Study These Flashcards
A

80 degrees
Cutting angle 40 degrees

23
Q

For a drill over 3” what needs to be limited

Study These Flashcards
A

Speed to 6000RPM

24
Q

How should you tighten a chuck

Study These Flashcards
A

By tightening at least 2 with a chuck key

25
What drill sizes need a pilot
Anything above 3.2mm needs to be piloted
26
What does deburring prevent
Stress razors
27
What is a limit
The minimum and maximum permanent sizes of a component
28
What is a tolerance
The difference between the minimum and maximum limits
29
What are the three ISO system of fits
Clearance Transition Interference
30
What is the system of fits and which one is preferred
Hole basis system - preferred Shaft basis system
31
What does a right hand twist reamer do
Directs the removal of the chips like a normal twist drill (swarf comes up)
32
What does a left hand reamer do
Twists the chips is the advance direction (down)
33
When should you use an expansion reamer
Only when a parallel reamer of correct size is unavailable
34
What are the sizes of tapered reamers for metric and imperial
Metric - 1:50 Imperial - 1:48
35
What size is etched on metric and imperial reamer
Metric - small diameter Imperial - large diameter
36
What is the most common countersink angle
100 degrees
37
When do we dimple
If the sheet metal is too thin SRM will specify
38
What are the three taps and in what order do you tap them in
Taper Intermediate Bottoming/plug
39
What is the advantage of a bottoming/plug tap
Has no taper so can cut full thread to bottom of a blind thread
40
What should you thread last a tap(internal) or die (external)
Die comes last
41
What are the three torque wren these
Deflecting beam Torsion bar Toggle
42
What is the problem with a deflecting beam and torsion bar
Parallax error, you may read the scale wrong
43
What should you always do before using a torque wrentcn
Use a torque analyser to check the torque is set correctly
44
What is the formula when using an extension torque
Specified torque x L / L x A
45
What should you use if access if restricted and you cannot use a torque wrench
Pre loaded washer
46
What is a ratchet stop used for on a micrometer
To prevent over tightening
47
For metric what is one full rotation equal to on a micrometer
0.5mm
48
For impetial what is one full rotation equal to on a micrometer
1/40 or 0.025”
49
How are micrometers calibarated
By using a gauge block

M7 (15 decks)

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