Hydra-Lock Corp

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Description

This was the first type of arbor and chuck developed by Hydra-Lock. The expanding member is a solid steel sleeve which has these advantages: maximum accuracy -- (Our standard tolerance is .0002" T.I.R.), repeatability to .000030" is possible with certain designs. There are no dirt-collecting slots to cause inaccuracies between part and arbor. Normal expansion of a one inch arbor is .005" with an additional .002" per added inch of diameter, i.e. a 5" arbor could easily expand .015" and perhaps much more depending on its length.The essential difference of this type versus class A is that the sleeve is split, thus rendering it less rigid, more flexible and therefore, greater expansion is possible for a given pressure. A one inch arbor of this class can expand .010" and for each additional inch of diameter add .004", i.e., a 5" arbor can expand .026" or more depending on its length.

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