power saws Flashcards

(35 cards)

1
Q

power hacksaw is classified in what group

A

cut off saws

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2
Q

What blade is best for long life

A

Fully hardened, molybdenum high speed steel

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3
Q

Power hacksaw blades lengths range from what

A

12 to 40 inch

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4
Q

4 different cut off saw machines

A

Power hacksaw
Horizontal band saw
Abrasive cut off saw
Cold circular cut off saw

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5
Q

Teeth of a blade are forced into the work piece how

A

By gravity or hydraulic pressure

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6
Q

The speed of power hacksaws are expressed how

A

Strokes per minute (spm)

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7
Q

How are horizontal band saw sized

A

According to the largest peice of material they can cut

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8
Q

How do band saw express there cutting speeds

A

Surface feet per minute (sfpm) or
Surface meter per minute (smpm)

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9
Q

Two types of band saws

A

Horizontal band saw
Contour band saw

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10
Q

What is the most commonly used cut off saw

A

Horizontal band saw

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11
Q

Contour band saw also known as what

A

Vertical band saw

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12
Q

Contour band saw is used for what

A

Shaping metal

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13
Q

what is set

A

the way the individual teeth or groups of teeth are bent out of line with the blade body

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14
Q

blade gauge is what

A

thickness of the body of the blade

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15
Q

what is blade kerf

A

width of the cut the blade makes in the workpiece

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16
Q

4 contour band saw accessories

A

work holding jaw
power feeding table
gravity feeding attachment
ripping fence

17
Q

what increases blade life

A

coolants and lubricants

18
Q

what are power feeding tables used for

A

heavy workpieces to maintain a constant feed rate through the blade

19
Q

3 common saw blade materials

A

high carbon steel
bimetal
tungsten carbide

20
Q

3 types of teeth forms

A

hook
skip
standard

21
Q

what 2 teeth forms have 0 degree rake angle

22
Q

what angle does a hook tooth have

A

positive rake angle

23
Q

high carbon steel blades are best suited for what materials

A

soft materials such as
mild steel
aluminum
brass and copper

24
Q

why are bimetal blades better then high carbon steel blades

A

they have faster cutting speeds and better durability

25
tungsten carbide blades are the same as bimetal except what
they have carbide tipped teeth
26
3 common sets on a blade
raker wavy straight/alternate
27
what is pitch
number of teeth per inch
28
what is constant pitch on band saw blades
uniform spacing of teeth gullet depth rake angle through length of blade
29
what is variable pitch on band saw blades
varies in tooth size depth and gullet reduces noise and harmonics
30
soft material requires what blade
coarse
31
hard material requires what blade
fine
32
friction saws cut up to what speeds
15,000 sfpm
33
3 types of abrasive grits
aluminum oxide silicone carbide diamond
34
4 types of bonding materials
resinoid rubber metal fibre or fabric
35
What is band tracking?
Band tracking is the position of the band as it runs on the wheels