Page:Practical Treatise on Milling and Milling Machines.djvu/105

Rh

Face milling cutters are attached to spindle of Vertical Spindle Milling Machines as follows: Cutter is placed on table with cutter driver in place (wood block is used to avoid damage to table or cutter teeth). Spindle is lowered, the nose of spindle entering hole in cutter, and cutter driver entering recess in spindle, where it is securely held by drawing-in bolt.

An additional advantage is found in this cutter (page 91), in the increased available working space. There is no long hub, as the cutter is held close to the spindle. The body of each cutter is made of steel, and the blades of high speed steel.

On earlier machines, the spindle nose was threaded and a different style of face milling cutter was used. Face milling cutters designed for use on taper-nose spindles can be used on threaded-nose spindles by the use of an Adapter Outfit. This outfit consists of taper sleeve with threaded hole, cutter driver and drawing-in bolt.

The taper sleeve fits over threaded nose of spindle and, being of the same taper as hole in face milling cutter, allows cutter to be drawn onto it by use of the cutter driver and drawing-in bolt; cutter driver fitting recess in spindle and slot in cutter.

Diagram, Fig. 56, shows sleeve and cutter driver in place.