BS 2518-1:1954

This standard BS 2518-1:1954 Specification for rotary form relieved gear cutters is classified in these ICS categories:

• 25.100.99 Other cutting tools
• 21.200 Gears

This British Standard applies to rotary form-relieved cutters for milling spur and helical gears within the range 1 to 30 diametral pitch.

Such cutters are deemed satisfactory for cutting gears intended to mesh together under conditions of service which are not severe.

NOTE It is not recommended that cutters designed in accordance with this standard be used for milling gears intended to mesh with generated gears. Where, however, it is found necessary to use milled gears for this purpose, a reduction in chordal thickness of the gear teeth is essential. (See Appendix A).

Instructions for setting out of tooth profiles of milling cutters for gears of standard 20° pressure angle type. Standard group of 8 cutters, special group of 15 cutters (1 to 8, increasing by ½ sizes). 14½° pressure angle cutters are also covered. Reductions in gear tooth thickness, necessary when milled gears are required to mesh with generated gears, arbor and keyway sizes, marking of cutters, ordering instructions, metric sizes.