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TECHNICAL INFORMATION
MILLING
V f
Check the condition of the tool holder( insert seat, shim, lever, screw) and check if the insert is well seated and clamped.
Check the stability of the machine. The tool overhang should be as short as possible.
Climb Milling
Usually this is the recommended direction. Tool life up to 40 % longer than conventional.
F v h = f z
V f f z
0. 7 x D D
Conventional Milling
Recommended only for:
• Old machines with backlash in the table transmission
• Flame cut, forged and cast workpieces
• Thin workpieces( in order to reduce vibration)
К = 90 ° Approach angle High radial forces / Low axial forces.
Recommended:
• When 90 ° wall is needed
• For slender workpieces
For face milling the width of cut( ae) should be about 70 % of the cutter diameter, in order to achieve better chip formation and longer tool life. For limited engagement conditions, it is necessary to increase feed per tooth.
45 ° f z h = 0.71 x f z
K = 45 ° Approach angle identical radial and axial forces. High productivity fz = 1.41 x h
Recommended:
• When overhang is long( lower vibration tendency)
• For face milling( 1st choice)
Round Inserts:
Roughing and general purposes. Strongest cutting edge.
315