BS 5246:1976
Current
The latest, up-to-date edition.
Specification for pinion type cutters for spur gears - 1 to 8 metric module
Hardcopy , PDF
English
27-02-1976
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Foreword
Specification
1. Scope
2. References
3. Terminology
4. Tooth form
5. Dimensions
6. Bore
7. Provision of datum cylinders
8. Tolerances
9. Marking
10. Instructions for ordering
Appendix
A. Incorrect gear action
Tables
1(a) Disc gear cutter dimensions (31.75 mm and 44.45 mm
diameter bore)
1(b) Disc gear cutter dimensions (58.738 mm diameter
bore 100 mm nominal size with optional keyway)
2. Extended hub gear cutter dimensions (31.75 mm and
44.45 mm diameter bore)
3. Screwed hub gear cutter dimensions
4. Dimensions of parallel and large stub and No.2
Morse stub taper shank gear cutters
5. Dimensions of bore
6. Accuracy tests
Figures
1. Cutter terms
2. Disc gear cutter
3. Extended hub gear cutter
4. Screwed hub gear cutter
5(a). Parallel shank gear cutter
5(b). Large stub taper shank gear cutter
5(c). No.2 Morse stub taper shank gear cutter
Dimensions and accuracy requirements for cutters for generating involute spur gear teeth. Two tolerance grades. Covers disc, extended and screwed hub, parallel, large and No. 2 Morse stub shank types. Markings for pinion type cutters and information to give when ordering. Module gears comply with ISO 53 and 54 but more information is given in this standard.
| Committee |
MCE/5
|
| DevelopmentNote |
Supersedes BS 2887(1957) & 73/32531 DC. (07/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies certain dimensions and accuracy requirements for non-topping pinion type finishing cutters for generating involute spur gear teeth of 1 to 8 metric module.
The following types of cutter are covered by this standard.
Disc [see Table 1(a) and Table 1(b)].
Extended hub (see Table 2).
Screwed hub (see Table 3).
Parallel shank (see Table 4).
Large stub taper shank (see Table 4).
No. 2 Morse stub taper shank (see Table 4).
These cutters are generally intended for the production of metric module gears which comply with the requirements of ISO 53 and ISO 54 and BS 436-2. This standard, BS 5246, includes two additional modules, 3.25 and 3.75.
Two tolerance grades are given.
Grade AA. Cutters for the production of gears to fine tolerances.
Grade A. Cutters for the production of gears for general purposes.
NOTE Grade AA is applicable to all the cutters illustrated except the screwed hub type shown in Figure 5.
Details of the markings recommended for pinion type cutters and information to be given when ordering standard cutters are included.
| Standards | Relationship |
| ISO 53:1998 | Similar to |
| UNE-EN 17529:2022 | Identical |
| BS 4656-26:1980 | Accuracy of machine tools and methods of test Gear shaping machines |
| ISO 701:1998 | International gear notation Symbols for geometrical data |
| BS 2519:1954 | Glossary of terms and notation for toothed gearing. |
| BS 436-2:1970 | Spur and helical gears Basic rack form, modules and accuracy (1 to 50 metric module) |
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