Module 1 Tool & Cutter Grinding part 1

Module1:Tool and Cutter Grinding

Milling cutters - Elements -1​

Tool & Cutter Grinding

Milling cutters - Elements

Milling cutters are multiple point cutting tools. They are made from cylindrical blanks with the teeth formed by milling the chip space.The number of teeth so milled depends on the diameter of the cutter as well as on the type of operation, namely roughing and finishing.

Tool & Cutter Grinding

Milling cutters - Elements

A roughing cutter will have less number of teeth as compared to a finishing cutter of the same diameter.

Tool & Cutter Grinding

Milling cutters - Elements

The types of milling cutters are

solid cutter

tipped solid cutter

inserted teeth cutter.

Tool & Cutter Grinding

Milling cutters - Elements

Most of the high speed steels cutters are dry ground as the sharpening operation. In dry grinding heat produced main body of the cutter.

If the water is applied to the heated cutter small hair line cracks may develop at the cutting edge of the cutter.

Tool & Cutter Grinding

The principal parts of a milling cutter

Body of the cutter:

The part of the cutter left after exclusion of the teeth.

Tool & Cutter Grinding

The principal parts of a milling cutter

Cutting edge:

The edge formed by the intersection of the face and

the provision of primary clearance for relief angle.

Tool & Cutter Grinding

The principal parts of a milling cutter

Face:

The portion of the gash adjacent to the cutting

edge.

Tool & Cutter Grinding

The principal parts of a milling cutter

Fillet:

The curved surface at the bottom of the gash.

Tool & Cutter Grinding

The principal parts of a milling cutter

Gash:

The chip space between the back of teeth and

face of the another teeth.

Tool & Cutter Grinding

The principal parts of a milling cutter

Land:

The part of the back of tooth adjacent to the cutting

edge.

Land is depending up on the type and size of cutter

width of the land is about 0.8mm to 1.6mm.

Tool & Cutter Grinding

The principal parts of a milling cutter

Outside diameter:

The diameter of the circle passing through the

peripheral cutting edge.

Tool & Cutter Grinding

The principal parts of a milling cutter

Bore diameter:

It is provide for insert the mandrel /Arbor.

The standard bore sizes of the cutter is 22, 27, 32mm

and 1" most commonly use of bore 27 and 32mm.

Tool & Cutter Grinding

The principal parts of a milling cutter

Root diameter:

The diameter of the circle passing through the bottom

of the filled.