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Author Topic: Stuart Dynamo pulley dimensions  (Read 141 times)

34046

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Stuart Dynamo pulley dimensions
« on: October 17, 2020, 03:10:45 am »
I need to make a crowned type pulley for an early Stuart type dynamo

If anybody can help on dimensions please I would be grateful

Thank you

Stuart

Stoker

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Re: Stuart Dynamo pulley dimensions
« Reply #1 on: October 17, 2020, 09:31:10 am »
My Stuart dynamo has what appears to be a combination pulley mounted on its 5/32" shaft. There is a round belt pulley groove which has a max. O.D. of 3/4" that is 7/32" wide and contains a groove .100" wide, with a 9/16" diameter at the groove bottom. Outside of that is a collar section for a flat belt with a 3/8" O.D. that is 9/32" wide, with a single tiny slotted setscrew, and showing no crown.

Hope that is of some help.
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34046

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Re: Stuart Dynamo pulley dimensions
« Reply #2 on: October 17, 2020, 10:28:10 am »
Thanks reply

This may help

Stoker

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Re: Stuart Dynamo pulley dimensions
« Reply #3 on: October 17, 2020, 06:33:58 pm »
Here's some images captured off the internet, that show just the kind of combo pulley that my Stuart dynamo has mounted.

Note that one of the images in B&W looks to be an official ST catalog image.

It may be that the image you show has been turned down to the crowned wide flat belt configuration from the original pulley, or from stock material. Or perhaps the wide flat belt only pulley was an option as well?

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"Information is not knowledge, Knowledge is not wisdom, Wisdom is not truth, Truth is not beauty, Beauty is not love, Love is not music: Music is THE BEST...   
Wisdom is the domain of the Wis (which is extinct). Beauty is a French phonetic corruption of a short cloth neck ornament currently in resurgence..."
F. Zappa ... by way of Mary, the girl from the bus.

eec1910

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Re: Stuart Dynamo pulley dimensions
« Reply #4 on: October 19, 2020, 09:28:17 am »
Hello Stuart,
I've measured the crown pulley on my 1934 Stuart dynamo and the highest point of the
crown is 0.750" going down to 0.685" at the ends,the length is 0.665".
You can see it on my Bassett Lowke Lighting Plant in the video section hope this helps.

Trevor.

34046

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Re: Stuart Dynamo pulley dimensions
« Reply #5 on: October 19, 2020, 03:25:01 pm »
Trevor

Many thanks - just what I needed.

Now off to find your video

Stuart

 

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