Ammco/Delta Rockwell 7-inch Shaper
An Operation and maintenance manual is available for this shaper. email for details.
By the time shapers get down to a 7" stroke they usually come to resemble something other than a standard industrial machine - but not so the American Ammco. This miniature tool, made by Delta Rockwell and sold by the Automotive Maintenance Machinery Co., 2112 Commonwealth Avenue, North Chicago, was constructed exactly along the lines of larger shapers and had five rates of reversible automatic cross feed - though the feed dial was ungraduated and there was no slide lock. The box had a horizontal travel of 9.5", a vertical travel 4.25" and could be moved to within 1.125 inches of the ram or extended a maximum of 5.25 inches away. The toolholder had a maximum travel of 3.25 inches. A useful safety feature was that the box would run off its feed screw if left on self-act - because shaper work is so steady there is a terrible temptation to set, and forget …...
Four speeds were provided, of 40, 70, 115 and 180 strokes per minute, from a rear-mounted motor which drove to a large pulley the supporting shaft of which passed through the rear of the body casting and carried at its other end a four-step pulley to drive the crank. Each of the two drive belts were independently adjustable for tension.
The box was properly supported at its front by a bar able to slide along a machined base and a most useful looking vice, with 4" wide jaws with an open capacity of 4.25", was supplied as standard. Unfortunately, the slots in the table were not of T section, but had plain, parallel sides. In the base of each slot was a row of plain 5/16" holes - which enterprising owners were able to tap out and use to bolt workpieces and attachments in place.
Although claimed as a 6-inch machine by Ammco, the maximum stroke was actually 7.25" and Delta Rockwell themselves advertised it as a 7-inch.
The shaper was 32" long, 18" wide, 242 high and weighed 225 lbs.