Re: (ET) Armature Maintenance

["David Roden" <etpost drmm net>]

On 9 Jul 2011 at 20:49, Karl Halbert wrote:

> 1. I have some wires that are nicked (shellac gone) but not cut all the 
> way
> through, what is the best way to seal them up again.

I'm far from being a motor expert, but since nobody else seems to have 
tackled this, I'll have a go at it.  If I'm off base, someone please 
correct 
me.

I think the stuff they coat windings with in electronics (such as small 
transformers) is similar, and it's a baked shellac.  You might be able to 
do 
it at home.  However, if you have a significant other who likes to use the 
oven for baking, you might get some static.  ;-)

But come to that, the wire used to wind armatures and transformers is, I 
think, coated in some kind of enamel.  A little research along those lines 
might be in order.

> 
> 2. I have an armature that can from a rust bucket motor housing and i
> covered in rust dust and stuff... what is the best way to clean it I 
> know I do
> not want to use chemicals that will cut the shellac (alcohol)... WD40?

A longtime electric vehicle hacker once suggested automotive brake cleaner 
to get the gunk out of my Comuta-Car's motor.  It seemed to work well.  
Just 
be sure to follow the cautions on the label - it's rather nasty stuff.

If in doubt on either point, I suggest engaging a reputable motor shop 
instead.  These motors are scarce enough and pricey enough that it's not 
worth risking them, IMO.  Call your local golf course and ask them who 
services their golf car motors (assuming they're electric golf cars).


David Roden - Akron, Ohio, USA

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