scope:

This Standard provides specifications for the ring-shaped synchronous endless trapezoidal profile belts (hereafter referred to as belts) and machined pulleys (hereafter referred to as pulleys), among other pulleys. It is not applicable to automotive belts and pulleys.

It is recommended that this Standard be also applied to sintered pulleys and taper brushed pulleys.

NOTE 1 Guidance on proper and economical designing of belt drives incorporating synchronous belts is provided in Annex JA.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 19347 : 2015 Synchronous belt drives - Imperial pitch trapezoidal profile system - Belts and pulleys (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.