What is the Difference between a Shell Mill and a Face Mill They can do the

# What is the difference between a shell mill and a

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What is the Difference between a Shell Mill and a Face Mill They can do the same thing they machine on the faces ONLY in a wide area ! 83
However a Shell Mill can machine on the Face and Sides 84 It is the shape of the carbide insert!
Also - a Shell Mill? 85 A shell mill is any of various milling cutters (typically a face mill or endmill) whose construction takes a modular form, with the shank (arbor) made separately from the body of the cutter, which is called a "shell" and attaches to the shank/arbor via any of several standardized joining methods.
Styles of Cutters High Speed End Milling 86 VIDEO Tungsten Carbide TiN Coated HSS
4 Fluted End Mill 87 This End Mill can NOT plunge cut!
3 Fluted End Mill 88 This End Mill CAN plunge cut Notice the difference in length of one cutting edge!
2 Fluted End Mill 89 This End Mill CAN plunge cut Notice the difference in lengths of cutting edges!
Styles of Cutters End Mills Glacern - VIDEO VIDEO 90
Styles of Cutters Slotting End Mills 2 Flute only VIDEO RE-SHARPENING END MILLS Choosing the RIGHT End Mill - VIDEO 91
Styles of Cutters Slotting & Side Mills usually 3/16 in. in thickness and above 92
Slotting & Side Mills Carbide also! 93
Styles of Cutters Circular Saws 94 Thickness - 1/8 in. - .006 in.
2 Flute End Mill Can cut a blind hole! 95
Styles of Cutters Form Cutters 96
Form - Gear Hobbing CLICK 97
Examples - Form Cutters 98
Ideal Rate of Feed Work advances into cutter, each successive tooth advances into work equal amount Produces chips of equal thickness Feed per tooth Feed = no. of cutter teeth x feed/tooth x cutter r/min Feed (in./min) = N x CPT x r/min 99
Examples: Feed Calculations Inch Calculations - HSS Find the feed in inches per minute using a 3.5 in. diameter, 12 tooth helical cutter to cut machine steel (CS70) *Low End First, calculate proper r/min for cutter: rpm x D xCS r 80 5 . 3 70 4 4 min / Feed(in/min) = N x CPT x r/min =12 x .010 x 80 = 9.6 in/min 100
Examples: Feed Calculations Finish Cut Find the feed in inches per minute using a 3.5 in. diameter, 12 tooth helical cutter to cut machine steel (CS70) 9.6 in/min 9.6 in/min ÷ 2 = 4.8 in/min 101 Rough Cut Finish Cut ***** If anything slow down on the feed*****
Examples: Feed Calculations Metric Calculations Carbide Tipped Calculate the feed in millimeters per minute for a 75-mm diameter, six-tooth helical carbide milling cutter when machining cast-iron (CS 60) *High End First, calculate proper r/min for cutter: rpm x D CSx r 256 75 200 , 19 75 320 60 320 min / Feed (mm/min) = N x CPT x r/min = 6 x 0.33 x 256 = 506.8 mm/min 102

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• Fall '16
• James Standing

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