IS 7657 : Part 2 : 2025 Starter Ring Gears for Internal Combustion Engines - Part 2 Gears for Axial and Coaxial Starters - Specification
1 SCOPE
This standard (Part 2) specifies gear profile, dimensions, material and other requirements for involute spurs gears for axial and coaxial starters having aluminium bronze or hardened steel pinions for use on heavy duty commercial vehicles, marine engines and heavy duty stationary engines.
2 REFERENCES
The standards given below contain provisions which, through reference in this text, constitutes provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards:
| IS No. | Title |
| IS 5517 : 1993 | Steels for hardening and tempering - Specification (second revision) |
| IS 1570 (Part 1) : 1978 | Schedules for wrought steels: Part 1 Steels specified by tensile and/or yield properties (first revision) |
| IS 7657 (Part 1) : 1975 | Specification for starter ring gears internal combustion engines: Part 1 Gears for inertia and solenoid pre-engaged starters |