Lucas E5H dynamo

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Lucas E5H dynamo

Postby FergusandTed » Wed Mar 06, 2019 7:07 pm

Good evening
I have a Lucas dynamo stamped E5H i can't find anything on line about it

Does anybody have any information on a Lucas E5H
Thanks
Mick

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Re: Lucas E5H dynamo

Postby aobp11 » Wed Mar 06, 2019 7:14 pm

Are you sure it's not an E3H?
IIRC the digit is the diameter in inches!
Albert

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Re: Lucas E5H dynamo

Postby FergusandTed » Wed Mar 06, 2019 8:57 pm

IMG_2389.JPG

I guess it should be a 3 but it looks like a 5
Mind you my eyes aren't what they was
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Re: Lucas E5H dynamo

Postby FergusandTed » Wed Mar 06, 2019 10:12 pm

So according to this website the E3H has one large screw in the case holding the pole shoe
Which my dynamo has so must be a E3H
the down side is it's only 45watt


https://jrcengineering.com/technical-su ... eshooting/

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Re: Lucas E5H dynamo

Postby Rob Harknett » Wed Mar 06, 2019 11:54 pm

Yes must be E3H
[1].jpg

Not sure if this shows more clearly, I think E3H was used on Triumph perhaps others
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Re: Lucas E5H dynamo

Postby Mick D » Thu Mar 07, 2019 8:49 am

Hi

According to James Smith's most excellent 'Classic Motorcycle Electrics Manual' the E3H designation indicates an Excentricaly mounted armature, 3 inch diameter body, H voltage control, ball bearing at drive end, bronze bush at commutator end. The book also suggest that the dynamo was fitted to 1938 - 48 Ariels and Scotts.

There's plenty of Lucas information in the archive under technical / electrics:

http://archives.jampot.dk/technical/Electric/

And also in the Brightspark Magnetos Library:

http://www.brightsparkmagnetos.com/library/index.htm

Regards Mick

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Re: Lucas E5H dynamo

Postby Rob Harknett » Thu Mar 07, 2019 9:08 am

You will see all bikes E3H fits in the archives 1936-57 ( complete ) Lucas book. The generator section starts with an explanation as to what prefix and suffix letters refer to.

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