Plain milling cutter, slide milling cutter, arbor cutters, shank cutters, face cutters. PROCEDURE: 1. The raw blank is selected with reference to the number of teeth to be cut. 2. Indexing number is calculated to the position of the blank. 3. Gear blank is mounted on mandrel in milling machine. 4. Milling produces 3-dimensional shapes with a rotating multi-edge cutting tool. The cutting tool can be programmed to move against a fixed workpiece in almost any direction. Milling tools remove material by their movement in the machine and from their shape. Audience Cylindrical Mill Cutter is the type of cutter which has a cylindrical shape and has teeth on the circumferential surface only. 9. Hollow milling cutter: It looks like a pipe having thicker walls. The cutting teeth of the hollow mills on the inside surfaces. This cutter used in the screw machines. 10. Figure 7-4.—Small vertical milling machine. This machine is used to cut most types of gears, milling cutters, and twist drills and is used for various kinds of straight and taper work. The PLAIN MILLING MACHINE (fig. 7-2) is the simplest milling machine because it has only a few of the features found on the other machines. You can The important types of cutting operations are Turning, taper turning, thread cutting, forming, knurling, facing, drilling etc., are mainly using lathe. Cutting tool is used for cutting apart or for removing chips. Cutting tools are divided into two types: i. Single point tools ii. Multi point tools The milling machine's knee rides up or down the column on a rigid track. A heavy, vertical positioning screw beneath forming flat surfaces, cutting dovetails and keyways, forming and fluting milling cutters and reamers, cutting gears, and so forth. Many special operations can be performed with the attachments available for milling machine Milling Machine is used for Machining flat surfaces, Slotting, Contoured surfaces. It is also useful for making Complex and irregular areas, Revolution surface, Gear cutting, Machining external and internal threads. Machining helical surfaces of various cross-sections and many more. Milling Machine Parts: Increasing the Rake Angle reduces the cutting force and the cutting temperature resulting in increased tool life. However, for large rake angle, tool edge is weakened resulting in increased wear due to chipping of the cutting edge. These conditions give an optimum rake angle which gives the maximum tool life. The milling machine removes metal with a revolving cutting tool called a milling cutter. With various attachments, milling machines can be used for boring, slotting, circular milling dividing, and drilling. This machine can also be used for cutting keyways, racks and gears and for fluting taps and reamers. b. Types. The universal machine is suitable for milling spur and helical gears, as well as worm gears and cam as it can be swivelled in a horizontal plane about 45 degree to either left or right. BED-TYPE MILLING MACHINE These are made more rugged and consequently are capable of removing more material without any chatter. 6.3 Method of Gear Manufacturing 6.4 Gear Cutting Methods 6.5 Gear Milling 6.6 Gear Finishing Operations 6.7 Gear Shaving 6.8 Roll Finishing of Gear Tooth 6.9 Gear Burnishing 6.10 Gear Honning 6.11 Summary 6.12 Answers to SAQs 6.1 INTRODUCTION Gear is one of the important machine tool elements which is an integral and inevitable In a milling