JB/T 12009-2014Commutator undercutting machines for micromotors (English PDF)

JB/T 12009-2014 is the English-translated version of 微电机换向器下刻机.

JB/T 12009-2014 is a recommended Chinese machinery industry standard for the machines that undercut the mica of micromotor commutators. It gives the models of the machine, the technical requirements, the test methods and the testing rules. Its scope is limited to commutators no more than 200 mm in diameter and no more than 150 mm long. The standard is classified K97 in China and 29.020 internationally, among the documents for electrical machine manufacturing equipment. It quotes GB/T 191, GB/T 2900.39, GB/T 13306, GB/T 13384 and GB/T 16769. Issued on 9 July 2014, it has applied since 1 November 2014.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

JB/T 12008-2014

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