BS ISO 1275:1995 Double-pitch precision roller chains and sprockets for transmission and conveyors
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This International Standard specifies requirements for double-pitch precision roller chains suitable for the
mechanical transmission of power and for conveyors, together with those for their associated sprockets. It covers dimensions, tolerances, length measurement, proof testing and minimum tensile strengths.
These double-pitch chains have been derived from some of the short-pitch transmission precision roller chains covered by ISO 606 having certain common dimensions but of double the pitch.
The chains are intended for use under less onerous conditions with respect to speed and power trans- mitted than are the base chains from which they are derived.