IS 9670 : 1980 Direct current micro motors for cassette tape recorders and other applications

1. Scope

1.1 This standard covers the mechanical values, performancerequirements, methods of test and also dimensions of the directcurrent (dc) motor, fitted with speed governors, or without speedgovernors, used in cassette tape recorders for driving capstan ofthe cassette tape deck mechanism.

1.2 It is noted that these motors are either fitted withinternal speed governor or external speed governor.

1.3 The motors covered by this standard may also be used forrecord players, instrumentation and other similar applications.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1271 :1958Classification for insulation materials forelectrical machinery and apparatus inrelation to their thermal stability in service

IS 1885 : Part XXXV :1973 Electrotechnical vocabulary:Part XXXV Rotating machinery

IS2106Environmental tests for electronics equipment:

Part II :1962Part II Damp heat (cycling)

Part III :1963Part III Cold test

Part IV :1963Part IV Dry heat test

Part IX :1964Part IX Drop test

IS 4691 :1968Degrees of protection provided by enclosurefor rotating electrical machinery

IS 4905 :1968Methods for random sampling

IS 6362 :1971Designation of methods of cooling of rotatingelectrical machines

IS 7572 :1974 Guide for testingsingle-phase ac anduniversal motors