MACHINING Copyright Goodheart-Willcox Co., Inc. Chapter 26 Milling Machines 463 Goodheart-Willcox Publisher Figure 26-49. An example of a setup for face milling on a horizontal milling machine. Clamping bolts should be as close to work as possible Clamp F Fa ce milll il r Piece f pap er i of prevents possibleb pre possi events p work slippage Approximately 1″ (25 mm) from the table ″ Goodheart-Willcox Publisher Figure 26-50. Straddle milling. A—These two cutters will cut two sides of a hexagonal bolt head at one time. B—An example of straddle milling on a flat section of material. B B A Work travel Rotation of cutters Arbor Work Matched side milling cutters Spacingg collar Gang milling, g g Figure 26-51, is a variation of strad- dle milling and involves mounting several cutters on the arbor to permit several surfaces to be machined in one pass. Gang milling is done when many similar pieces must be made. 26.7.5 Slotting Slotting, g g Figure 26-52, is very similar to slitting except the cut is made only partway through the work. The slot in a screw head is an example of slotting. SAFETY NOTE SAFETY NOTE Do not stand directly in line with the cutter in case the saw shatters. Goodheart-Willcox Publisher Figure 26-51. Gang milling involves the use of three or more milling cutters mounted on the same arbor. Cutter rotation Work travel Cutters to meet machining requirements Goodheart-Willcox Publisher Figure 26-52. Screw heads being slotted with a slitting saw.