power saws Flashcards
power hacksaw is classified in what group
cut off saws
What blade is best for long life
Fully hardened, molybdenum high speed steel
Power hacksaw blades lengths range from what
12 to 40 inch
4 different cut off saw machines
Power hacksaw
Horizontal band saw
Abrasive cut off saw
Cold circular cut off saw
Teeth of a blade are forced into the work piece how
By gravity or hydraulic pressure
The speed of power hacksaws are expressed how
Strokes per minute (spm)
How are horizontal band saw sized
According to the largest peice of material they can cut
How do band saw express there cutting speeds
Surface feet per minute (sfpm) or
Surface meter per minute (smpm)
Two types of band saws
Horizontal band saw
Contour band saw
What is the most commonly used cut off saw
Horizontal band saw
Contour band saw also known as what
Vertical band saw
Contour band saw is used for what
Shaping metal
what is set
the way the individual teeth or groups of teeth are bent out of line with the blade body
blade gauge is what
thickness of the body of the blade
what is blade kerf
width of the cut the blade makes in the workpiece
4 contour band saw accessories
work holding jaw
power feeding table
gravity feeding attachment
ripping fence
what increases blade life
coolants and lubricants
what are power feeding tables used for
heavy workpieces to maintain a constant feed rate through the blade
3 common saw blade materials
high carbon steel
bimetal
tungsten carbide
3 types of teeth forms
hook
skip
standard
what 2 teeth forms have 0 degree rake angle
standard
skip
what angle does a hook tooth have
positive rake angle
high carbon steel blades are best suited for what materials
soft materials such as
mild steel
aluminum
brass and copper
why are bimetal blades better then high carbon steel blades
they have faster cutting speeds and better durability
tungsten carbide blades are the same as bimetal except what
they have carbide tipped teeth
3 common sets on a blade
raker
wavy
straight/alternate
what is pitch
number of teeth per inch
what is constant pitch on band saw blades
uniform spacing of teeth
gullet depth
rake angle through length of blade
what is variable pitch on band saw blades
varies in tooth size
depth and gullet
reduces noise and harmonics
soft material requires what blade
coarse
hard material requires what blade
fine
friction saws cut up to what speeds
15,000 sfpm
3 types of abrasive grits
aluminum oxide
silicone carbide
diamond
4 types of bonding materials
resinoid
rubber
metal
fibre or fabric
What is band tracking?
Band tracking is the position of the band as it runs on the wheels
