Milling Cutters (1)

8/2/2019 Milling Cutters (1)

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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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Milling Cutters (1)

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