Milling Defined The process of cutting away material by feeding a workpiece past a rotating multiple tooth cutter

Vertical Milling Machine

Milling Machine Parts

Horizontal Milling Machine

Milling Operation

Conventional or Up Milling

Climb Milling

Milling Cutters

End Mills

Tool Holding for Milling

End Milling

Face Milling

Milling Workholding Devices

Calculating RPM For Milling RPM = CS x 4/D Where RPM = Spindle speed (in revolutions per minute). CS = cutting speed of milling cutter (in SFPM) D = diameter of milling cutter (in inches)

Calculating Feed Rate For Milling Feed Rate is expressed in IPM IPM = CPT x N x RPM IPM = Feed rate in inches per minute. CPT = Chip per tooth N = Number of teeth of the milling cutter

Calculate Feed Rate For Milling Given The Following: CS = 300 D = 0.5” CPT = N = 2

Answer The first step is to calculate the spindle speed before the feed rate can be calculated. RPM = CS X 4/D = 300 x 4/0.5 = 2,400 The second step is to calculate the feed rate. IPM = CPT x N x RPM = x 2 x 2,400 = 24 IPM (Inches Per Minute)

Offset Boring Head

Right Angle Attachments

Digital Readout

Bed-Type Milling Machine

Horizontal Knee/Column Milling Machine

Machining Center

Calculate IPM and RPM Given that: –CS = 250 –D = 0.25” –CPT = –N = 4 Show your work here: RPM = _______; IPM = ________ Your Name: ________________________