Friday, June 6, 2014
Compac Geneve Indicator Specifications
Compac has been producing measuring instruments such as dial indicators, test indicators, and dial bore gauges since the 1940s. Originally founded as an independent company in Geneva, Switzerland, the company has since merged with the Tesa Division of Hexagon Metrology in Renens, Switzerland, which also produced Bestest, Tesatast, and Interapid indicators.
Compac Test Indicators
Compac produces two types of test indicators, including the single revolution (standard range) model and the multiple revolution (long-range) model. The single-revolution indicators are produced in an inch-reading horizontal model and a metric horizontal model. Each is available in a range of graduations: as small as .0005 millimeter (mm) and as large as .01 mm, and total range as small as .2 mm and as large as .8 mm. The multiple-revolution indicators are also available in inch-reading and metric horizontal models, with both vertical and parallel capabilities in a wide range of specs.
Compac Dial Indicators
Compac produces three variations of dial indicators, including small dial (40 mm), large dial (58 mm), and long-range (25 mm and more) models. The small-dial indicators come in a similar range of inch-reading and metric models as the test indicators. They are also available in waterproof and high-resolution aspects. The large-dial and long-range models are both only available as metric models. A variety of lug backs are available, including metal back with 8 mm fixed shank for all 58 mm models and lug back on and off center with .25-inch hole for all 40 mm models.
Dial Bore Gauges
Compac has produced dial bore gauges both in inch-reading and metric models, though at the time of this article only the metric models are still in production. These indicators are comprised of two sections: the measuring head and the dial bore indicator, both of which can be customized to a range of specs. The dial bore indicators are available in graduations of .002 mm, .001 mm, and .01 mm in standard format, as well as in small dial format at .002 mm and .001 mm. The measuring heads come as wide as small as 3.75 mm and as wide as 500 mm.
History of Compac Indicators
During the 1950 and 1960s, Compac of Geneva produced the best-selling import of indicators and dial bore gauge s in the United States, sold under the name Alina. In Europe, these same indicators were sold under the name Parvus. In the 1970s, the current Compac models began production and have remained almost exactly the same since their inception. They have also been sold under the name Mercer in the UK and as SPI in the United States.
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