Post on 05-Apr-2018
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Name : Abhijeet Rao
Roll no. 24
Industrial engg. 3rd year
Manufacturing technology II
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Once widely used
Cylinder of high-speed steel with teeth cuton periphery
Used to produce flat surface Several types
Light-duty
Light-duty helical
Heavy-duty High-helix
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Less than in. wide, straight teeth
Used for light milling operations
Those over in have helix angle of 25
Too many teeth to permit chip clearance
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Have fewer teeth than light-duty type
Provide for better chip clearance
Helix angle varies up to 45 Produces smoother surface because of shearing
action and reduced chatter
Less power required
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Comparatively narrow cylindrical millingcutters with teeth on each side and onperiphery
Used for cutting slots andfor face and straddle millingoperations
Free cutting action at high
speeds and feeds Suited for milling deep,
narrow slots
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Generally over 6 in. in diameter
Have inserted teeth made of high-speed steelheld in place by wedging device
Most cutting action occursat beveled corners andperiphery of cutter
Makes roughing andfinishing cuts in one pass
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Teeth neither parallel nor perpendicular tocutting axis
Used for milling angular surfaces
Grooves, serrations, chamfers and reamer teeth
Divided into two groups
Single-angle milling cutters
Double-angle milling cutters
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Single-angle Teeth on angular surface
May or may not have teeth on flat
45 or 60 Double-angle
Two intersecting angular surfaceswith cutting teeth on both
Equal angles on both side of lineat right angle to axis
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Incorporate exact shape of part to beproduced
Useful for production of small parts
Each tooth identical in shape Sharpened by grinding tooth face (may have
positive, zero or negative rake) Important to maintain original rake
Difficult to sharpen
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Cutting teeth on end as well asperiphery
Fitted to spindle by suitable adapter
Two types Solid end mill: shank and cutter integral
Smaller with either straight or helical flutes
Two flute or four flute
Shell end mill: separate shank
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Used to cut wide horizontal groove atbottom of T-slot After narrow vertical groove machined with end
mill or side milling cutter
Consists of small side milling cutter withteeth on both sides and integral shank formounting
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