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Fellows straight line gear generator
FELLOWS STRAIGHT LINE GEAR GENERATOR
USED FELLOWS STRAIGHT LINE GEAR GENERATOR
See Fellows PDF Specifications Here
THE STRAIGHT-LINE GEAR GENERATOR has been designed especially for cutting small external spur and helical gears on a high-production basis. This machine is admirably suited to the requirements of manufacturers of recording instruments, meters, motion picture cameras and projectors, clocks, etc.
It is equipped with an automatic means for loading and unloading the work, similar in design and operation to the Fine-pitch bear Shaper. It differs, however, from that machine in that it uses a rack-type cutter that is carried in a clapper box-type of holder, the latter being mounted on a swivel plate attached to a slide. The slide is reciprocated at speeds as high as 2000 strokes per minute. The rack holder and swivel plate can be set for cutting both spur and helical gears.
The rack cutter is made 6 3/8" inches long, or approximately the same length as the pitch circumference of a 2" gear, which is the maximum capacity.
The bed of the machine carrying the rack holder and slide is traversed by a lead screw. A compensating device is included, which, working in combination with the work change gears, effects the required linear travel of the bed to keep the rack cutter in the proper relation to the work. It also affords a means for effecting slight increments in the rate of travel of the rack cutter without altering the change gears, and thus reduces the number of change gears required.
When this machine is equipped with a magazine feed and is operating automatically, the position of the rack cutter relative to the work is controlled by dogs which operate a reversing mechanism that changes the direction of travel of the bed.
The dogs would be set to use the first group of teeth at one end of the cutter, and the bed alternately traversed in both directions, a pinion being finished at the completion of each traverse.
The gaps in the rack cutter permit loading and unloading the work without stopping the operation of the machine or withdrawing the cutter from the work.
This machine can also be arranged for hand loading in which case a limit switch at the rear of the machine stops the machine at the completion of the gear.
FOR CUTTING SMALL, FINE PITCH EXTERNAL AND HELICAL GEARS
