This International Standard specifies the characteristics of a range of steel roller chains dimensionally derived from the malleable iron type, suitable for conditions of operation and maintenance prevailing in such fields as agriculture, building, quarrying and related industry, mechanical handling, etc., together with associated chain wheels. The dimensions are given in inches and in millimetres; the latter are conversions from the basic inch dimensions.
IS 2637-1991 history
2004IS 2637-2004 Steel roller chains Type S and C, Attachments and chain wheels (Second Revision )
1991IS 2637-1991 Steel roller chain S and C attachments and sprockets