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In 1906 a separate company, The Churchill Machine Tool Co Ltd, was established with the purpose of adapting tools imported by Charles Churchill & Co. The former expanded, producing American tools under licence and then manufactured tools of its own design, in particular precision surface grinders and similar
A surface grinder is a machine tool used to provide precision ground surfaces, either to a critical size or for the surface finish. The typical precision of a surface grinder depends on the type and usage, however ±0.002 mm (±0.0001 in) should be achievable on most surface grinders.
Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1] Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.
UnionChemnitz is a world leader in the manufacture of horizontal boring and milling machines. In May 2012, Herkules integrated the gearbox manufacturer RS Antriebstechnik (now RSGetriebe GmbH) in Sonthofen/Germany. RSGetriebe designs and builds special gearboxes for a diverse range of industries, such as the machine tool and plastics industry ...
In 1977, the first sales offices were opened in Germany and the USA. In 1980, LTA Lufttechnik GmbH, a manufacturer of filtration systems, was founded in Achern, Germany. In 1992, Erwin Junker acquired three Czech manufacturers of grinding machines and subsequently the JUNKER Group was formed. In 1995, JUNKER opened a Technology Center in Nordrach.
The tolerances that are normally achieved with surface grinding are ±2 × 10 −4 inches (5.1 μm) for grinding a flat material and ±3 × 10 −4 inches (7.6 μm) for a parallel surface. [4] The surface grinder is composed of an abrasive wheel, a workholding device known as a chuck, either electromagnetic or vacuum, and a reciprocating table.
The D-bit (after Friedrich Deckel, [1] the brand of the original manufacturer) grinder is a tool bit grinder designed to produce single-lip cutters for pantograph milling machines. Pantographs are a variety of milling machine used to create cavities for the dies used in the molding process ; they are largely obsolete and replaced by CNC ...
The company developed the first drop-tank wire EDM in 1994, [6] and HQSF (High-Quality Surface Finish) technology with patented uSc additive in 1996, [6] increasing the ability to finish parts without hand polishing when using a ram EDM. In 2003, Makino developed the first conventional horizontal wire EDM that automatically threads and machines ...
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