metals hand tools what every machinist needs to know about metals processing 110
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Metals Hand Tools
What Every Machinist Needs to Know about
Metals Processing 110
Machinist Vise
Solid Base Vise Swivel Base Vise
Vise Jaw Caps(Soft Jaws)
Used to prevent marking the work
Peen Hammers
Ball Peen Hammer(Machinist’s Hammer) Cross Peen Hammer Straight and Cross
Peen Hammers
Soft Face Hammers
With Interchangeable Faces
Metal Stamps
For placing Names,Serial Numbers, etc.
Hacksaws
Solid framehacksaw
Adjustable framehacksaw
Hacksaw Blades
Hacksaw teethShould point towardThe front end of the saw
Tooth Pitch(Teeth per Inch)
18 Teeth per InchBlades are made fromHigh carbon SteelHigh Speed Steel (molybdenum alloy
or Tungsten alloy)
Saw Tooth Pitch
SET: bending the teethof a saw left and right tomake the KERF wider thanthe saw blade
Blade
Kerf
Set
Saw Teeth Too Big???
Too Small???
Installing a Blade
Pins
Wing nut fortightening/looseningblade
1. Get correct blade (length, pitch, material, type)
2. Adjust Frame3. Place ends of blade on pins
with teeth pointing to frontand teeth down
4. Tighten wing nut finger tight
Sawing Sheet (Thin) Metal
Sandwich the metalbetween strips ofwood.
This will keep thethin metal fromvibrating and allows2 or more teeth tocontact the work
ChiselsFlat Cold Chisel
Cape Chisel
Diamond Point Chisel Round Nose Chisel
Cut SheetMetal
Cut Keyways
Cut V-Grooves Cut Oil Grooves
1. Tang2. Heel3. Edge4. Face5. Point6. Length
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Parts of a File
File Grades of Coarseness• Dead Smooth
• Smooth
• Second Cut
• Bastard
• Coarse
• Rough
Files come in different sizes and degrees of coarseness
There are 4 common gradesplus 2 which are not often used
Files are also sold in 7 different lengths in inches
46
810
1214
16
Draw Filing
Draw filing allows you toremove small amountsof metal, keep a surfaceflat and produces a nice,smooth surface finish
Use a mill fileHold the file crosswaysKeep fingers close to theSurface being filedPress downMove the file back and forthDo not roll over the edges
Hand Taps
Used to cut screw threads inside a hole
Flutes are grooves in the tap
Flutes provide cutting edges, provide chipclearance and allow cutting fluid in
So, What Does ½-UNC-13 Mean?
UNC means it is a Unified National Coarse seriesThread Inch threads are either Coarse or Fine (UNF)
The fraction “1/2”is the diameter ininches of the threadedpart of the bolt or screw
½ inch
The number afterthe series (UNC)is the Number ofthreads per inch
13 threadsThe pitch or sizeof one thread hereIs 1/13 of an inch
So, What Does M30-3.5 Mean?The letter “M” just means it’s a Metric thread
The number “30”is the diameter ofthe threaded partOf the bolt or screw
30 mm
Pitch (the size of one thread)or how far the thread travelswhen the screw makes one turn
3.5 mm
The number afterThe dash (3.5) is thePitch of the thread
A Set of TapsA set of taps includes a taper tap, plug tap and bottoming tap
Taper TapUsed to starta thread in a
hole
Plug TapUsed to start
a thread and goalmost to the bottom
of a blind hole
Bottoming TapUsed to thread to
the bottomof a blind hole
That’s All, Folks
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