scope:

FOREWORD

For many years, roller chain manufacturers have furnished a substantial volume of chains consisting of link plates assembled on pins without the use of bushings and rollers. Such chains provide relatively high strength per unit of weight and have found wide usage where sprockets are not required and high speed power transmission characteristics are not needed.

Previously, variation in link plate thickness, in link plate contour, in diameter of pins, and in the method of lacing has caused lack of interchangeability and has tended to restrict its use. For these reasons, the Association of Roller and Silent Chain Manufacturers, on September 21, 1951, appointed a task sub-committee to develop this standard.

The scope of the resultant standard covers the lacing, pin diameter, diameter of link plate holes, link plate contour and thickness, chain widths, and the minimum ultimate tensile strengths. The standard also recommends clevis and sheave design.

Supplementary information for the guidance of users in the application of these chains was included in the 1958 Edition and deleted in 1960.

The 1971 Reaffirmation was approved by The American National Standards Institute on September 10, 1971.