Precise Ultra-high-speed Milling Machines
Manufactured by the Precise Products Corporation of both Racine, Wisconsin and Düsseldorf, Germany, the Precise Model 65 high-speed, high-precision drill press was a spin-off from the company's well-established range of hand-held portable electric tools. Details of the Company and its product can be found at the bottom of the page - reproduced from the writer's article on Precise milling machines.High-resolution pictures - may take time to open
Specially developed as an industrial-quality unit for prolonged and reliable use, the first of the Precise self-contained drill presses was a complex and expensive unit fitted with a variable-speed, 1/2 h.p. motor, that gave spindle speeds from 10,000 to 45,000 r.p.m. Speed was varied by a large dial on the right-hand face of the column with control of start and stop by a choice of a standard-fit manual push button, an optional-extra foot switch - or, to help with automated production processes, an electronically controlled, "momentary signal".
Control of the 1-inch quill feed was not by the usual handle or handwheel but a 40 to 60 lbs/sq/inch air-hydraulic system, this arrangement allowing a drilling feed rate to be set that varied from one to one-hundred and twenty inches per minute.
The drill head was adjustable up and down on wide and so stable V-edged slideway machined into the front face of the heavy cast-iron column; the maximum distance between the end of the 0 to 5/32" capacity chuck being 43/8", the minimum distance 1/8" and the throat 85/16".
Accessories included collets in place of the precision drill chuck, sub-collets and a work light. The drill head could also be purchased as a separate unit for mounting on other machine tools, typically vertical millers, larger drill presses or incorporated into special machines where very fine work need to be done - examples of such adaptations of the maker's portable high-speed spindles can be seen on this page.
Fitted as standard to the Precise 65 was a built-in vapour coolant system complete with filter and a pressure gauge. Ground flat, without T-slots, the table measured 8" x 5".
In 1957 the drill was listed in the United States at an expensive $1075.00, an amount that would have bought a year's tuition at Harvard - or 125 shares in Berkshire Hathaway, today worth £25.4 million.