Posted by Michael Kelly on February 17, 2010 at 10:56:48:
In Reply to: difference between models of Fellows #7's posted by steve green on February 12, 2010 at 12:45:44:
7125 is adapted to handle external and internal spur and helicals, shank gears and internal gears requiring the use of shank cutters. It has a tapered hole cutter spindle for shank cutters, an adapter for cutters with 1-1/4 holes and a 2-1/8 inch straight hole work spindle with an adapter for using standard reverse taper arbors.
#77 and 775 high speed shapers which are designed for side trimming internal gears and clutches. On these machines, the work does not rotate and the cutter is oscillated by a side trimming attachment. The work spindle is provided with a relieving nmechanism which withdraws the work from the cutter on the return stroke. These machines have complete electrical control and are equiped with a reversing switch providing forward, reverse and stop.
7A differs from the 7 in several respects. maximum face on a 7a is 2 inches verses a 1-1/2 on a #7. The 7A is heavy duty. The 7A carry the following designation numbers: 7125A, 77A and 775A
7125A will cut spurs or helicals, internal or external. Has a hollow cutter spindle, with taperhole for shank cutters for internal gears. An adapter for disk type cutters for externals.
Straight guide for spurs needs helical guide for helicals along with a helical cutter. 2-1/8 straight hole for the work spindle. A work spindle adapter is furnished with the machine for standard reverse tapered arbors.
77A and 775A designed for side trimming internal gears and clutches. The work does not rotate.
For more information, email me and I can send you copies of the information I have .