BS 2697:1976

Foreword
Cooperating organizations
Specification
1. Scope
2. References
3. Terminology
4. Tooth form
5. Dimensions
6. Accuracy requirements
7. Marking
8. Ordering instructions
Tables
1. Dimensions of rack type cutters
2. Dimensions of rack type cutters, inclined
     mounted parallelogram type
3. Dimensions to position of first tooth on all types
     of cutters
4. Accuracy requirements for rack type gear cutters
Figures
1. Rack type gear cutter; terminology
2. Rectangular mounted cutter
3. Inclined mounted cutter
4. Inclined mounted parallelogram cutter
5. 20 deg pressure angle basic gear rack tooth profile
     in terms of unit normal metric module
6. Position of first tooth

Covers non-topping finishing cutters, 1-40 module, for involute spur and single helical gears to BS 436:Part 2. Dimensions, accuracy, terminology, marking and ordering instructions. One accuracy test for backplates.

This British Standard specifies certain dimensions and accuracy requirements for non-topping finishing rack type gear cutters in the range 1–40 metric module inclusive, which are used in gear planing machines intended for the generation of spur and single helical gears having an involute form.

It does not relate to cutters for double helical gears.

One accuracy test also relates to backplates.

These cutters are intended for use in the production of metric module gears with a 20° pressure angle and which comply with the requirements of ISO 53 and ISO/R54 and BS 436-2. This British Standard 2697 includes two additional modules, 3.25 and 3.75.

This standard specifies two grades of tolerance for cutters, grade A and grade B.

The following types of cutter are covered by this standard:

Rectangular mounted cutters.

Inclined mounted cutters.

Inclined mounted parallelogram cutters.

Details of information to be marked on cutters and information which is recommended to be given when ordering cutters are included.