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Rush Machinery offers a series of air-bearing end mill grinding fixtures that allow precision sharpening of end mills, reamers, shell mills and various other cutters. The spindle floats on a thin film of air, resulting in a smooth, even, almost frictionless grind, the company says. The fixture mounts on the company’s drill and tool grinders, and it is also available with a universal base to mount on most other tool and cutter or surface grinders, the company says.
The units feature a hard, chrome-plated and ground spindle with a 10" stroke. Tools are held by 5C or 5-ST collets or by extension bushings for shanks ranging to 2" (50 mm) in diameter. The fixtures allow for grinding the OD of any number of flutes, and they include a 12-position index plate for end grinding (other index plates are available). The micrometer in feed is graduated in 0.001" (0.04 mm) of diameter. Use of the fixture allows the operator to customize end mill geometry for optimum performance.
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