EXOCARB ® DG Long Length of Cut DG Coated 4-Fluted End Mills for Graphite
Contouring List 7440: DG-EML
Graphite
Work Material
Slotting
Side Milling
Cutting Speed
246 SFM
246 SFM
Aa = 1D Ar = 0.1D
Depth of Cut
Aa = 0.1D
Mill Dia.
Speed RPM 25,000 20,000 15,000 10,000 7,520 5,010
Feed in/min
Speed RPM 25,000 20,000 15,000 10,000 7,520 5,010
Feed in/min
Inch 1/32 3/64 1/16 3/32
100
142
66 50 33 25 16 12
95 71 47 35 24 18 12
1/8
3/16
1/4 3/8 1/2
3,860 2,500 1,880
3,860 2,500 1,880
8 6
9
Set the ramping angle to be approximately 3°. 1. Adjust the speed, the feed rate, and the depth of cut to suit your operating conditions, such as the milling shape, machine reigidity, tool holder rigidity, and work holding force. 2. If you are unable to reach the speed and feed rate indicated in the table above, lower the speed and feed rate using the same ratio. 3. If the workpiece gets chipped or if the operation requires a higher level of milling precision, lower the feed rate as necessary. 4. Depending on the shape, if the workpiece chatters, lower the speed and feed rate using the same ratio. 5. To mill graphite, use a dedicated milling machine. To prevent inhalation of dust, use a dust collector and a dust mask when working around graphite. 6. During milling, keep the runout at the tip of the end mill to be less than 0.0004 inches (0.01 mm). 7. If a cut involves the shaping of a corner during side milling, use the corner radius process of the program, or adjust the speed so that it will not cause chattering, and reduce the speed at the corner at the same time (approximately 40%).
osgtool.com
1384
End Mill Technical
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