Guides
Guides for repairers
How to measure, when to replace, and what the job involves. Written for the bench, not the brochure.
5 min read
How to measure a commutator
The A to G dimensions, how to count segments, and how to photograph it so we can quote first time.
Read the guide4 min read
Signs a commutator needs replacing
Burnt bars, wear below the mica, flat spots, loose segments: when to replace rather than skim.
Read the guide5 min read
Replacing a starter motor commutator: what the job involves
Pressing off, fitting, connecting the windings, skimming and undercutting, and when to hand it to a rewinder.
Read the guideSomething we should write about?
If there is a measurement, a commutator type or a repair question you keep running into, tell us and we will add a guide.
Suggest a guideGot a drawing, or just the old part? Send it over.
A drawing in any format, or photos of the old commutator with its dimensions, is enough for us to quote. Use the form or email it. We reply to every enquiry within one working day.
Monday to Friday, 8.30am to 5pm. Richmond, Surrey.