Counter Bore

Spot Facing – Provides a true bearing surface for a washer. Counter boring – Provides a recess for a bolt head, bushing or pin.

Tool construction Similar to an end mill, cuts on the end. Different from an end mill in that there is no cutting edge on the outside diameter. Normally spiral angle of 15 degrees. Brass requires straight flutes.

Rotary table Adding another axis to the mill

Speeds production of hole patters Allows milling of curves, pockets, channels where not easily done otherwise. Horizontal Vertical

Fixture Fixture Plate Chuck Toe clamp

Part Location Co Axial indicator (Co-ax indicator) Simple means of center locating in round parts. May be run at LOW speeds when indicating

Process Deck part using mill and rotary table Locate center C- bore to depth of.250