Mamod drive-belt tension

[Bob Unitt 1Participant @bobunitt1]

I've acquired some Mamod drive-belt (the screw-together kind) for the governor on my Lady Stephanie, to replace the elastic band used currently. I have no idea of what length of belt I need, so how much tension should there be on the band once it's fitted ?

[Bob Unitt 1Participant @bobunitt1]

How tight should a Mamod drive-belt be ?

[john halfpennyParticipant @johnhalfpenny52803]

Not very much, but of course depends on the torque you are trying to transmit/overcome. However it's easy to start slack and snip bit by bit off the female end before re-attaching the (tapered) male end

[Former MemberParticipant @formermember12892]

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[Bob Unitt 1Participant @bobunitt1]

Thanks. The guy I bought it from said that once it was screwed together it was impossible to unscrew – is that not the case ?

[Former MemberParticipant @formermember12892]

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[Roger BestParticipant @rogerbest89007]

1/2" is too much to chop off. They are very sensitive to just a few mm plus minus. Just go carefully.

Obviously it varies with size of garter spring, and length required.

i am no longer surprised when I get it wrong.

[Bob Unitt 1Participant @bobunitt1]

Thanks for the info. I have at least 1/2" jockey-wheel adjustment on a length of about 5" – will it be sufficient to make it fit closely but not stretch, and use that adjustment to get the tension right ?

[Former MemberParticipant @formermember12892]

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[Bob Unitt 1Participant @bobunitt1]

Thanks guys, all done now after 3 attempts – those belts don't join easily, do they ?

If anyone else is making a Lady Stephanie and intends to use the Mamod belt, the length you need is 7.375 inches.

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