Model electric motor


P

petek

I have a battery operated model electric motor from my youth c.1960's. It'san SEL ref: 3/1262. From t'internet searches I understand SEL were part ofMamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to understand how electric motors worked. Recently my grandson came across it in the back of a cupboard, and I want to show him how it works but one of the copper contact strips which rub on the commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut out a shape approx 7mm x 22mm. Don't know where I could buy such a small piece (I've looked at Hobby's Ltd catalogue but no joy) or what other appliance/machine I could cannibalise.

Any ideas
Thanks
Pete
 
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J

Jim K

I have a battery operated model electric motor from my youth c.1960's. It's an SEL ref: 3/1262. From t'internet searches I understand SEL were part of Mamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to understand how electric motors worked. Recently my grandson came across it in the back of a cupboard, and I want to show him how it works but one ofthe copper contact strips which rub on the commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut out a shape approx 7mm x 22mm. Don't know where I could buy such a small piece (I've looked at Hobby's Ltd catalogue but no joy) or what other appliance/machine I could cannibalise.

Any ideas
Thanks
Pete
torch innards?

Jim K
 
G

Graham.

I have a battery operated model electric motor from my youth c.1960's. It's an SEL ref: 3/1262. From t'internet searches I understand SEL were part of Mamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to understand how electric motors worked. Recently my grandson came across it in the back of a cupboard, and I want to show him how it works but one of the copper contact strips which rub on the commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut out a shape approx 7mm x 22mm. Don't know where I could buy such a small piece (I've looked at Hobby's Ltd catalogue but no joy) or what other appliance/machine I could cannibalise.

Any ideas
Thanks
Pete

I'm not sure why the brushes would need to to copper. Tinplate cut
steel drinks can?
 
H

harryagain

I have a battery operated model electric motor from my youth c.1960's. It's
an SEL ref: 3/1262. From t'internet searches I understand SEL were part of
Mamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to
understand how electric motors worked. Recently my grandson came across it
in the back of a cupboard, and I want to show him how it works but one of
the copper contact strips which rub on the commutator is broken and bent so
I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut
out a shape approx 7mm x 22mm. Don't know where I could buy such a small
piece (I've looked at Hobby's Ltd catalogue but no joy) or what other
appliance/machine I could cannibalise.


Cut up some copper water pipe.
 
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J

John Williamson

Nightjar said:
I suspect that you want phosphor bronze. That is springy and will hold
itself against the commutator far better than copper. I used to buy it
cut to width from Smiths Metal Centres, but in rather larger amounts
than you need.
+1

Copper brushes on a copper commutator are not a good idea.

Google say this lot:-

http://www.lyonindustries.com/index.php?page=shop.browse&category_id=11&option=com_virtuemart&Itemid=3

Sell phosphor bronze shim, but you may fall foul of a minimum order value.

Depending on the size, Triang X04 (Or other similar) motor brushes are
made of phosphor bronze with a copper-carbon block bonded to the end,
and may give better performance.
 
I

Ian Jackson

John Williamson said:
+1

Copper brushes on a copper commutator are not a good idea.

Google say this lot:-

http://www.lyonindustries.com/index.php?page=shop.browse&category_id=11&
option=com_virtuemart&Itemid=3

Sell phosphor bronze shim, but you may fall foul of a minimum order value.

Depending on the size, Triang X04 (Or other similar) motor brushes are
made of phosphor bronze with a copper-carbon block bonded to the end,
and may give better performance.
I've got some old phosphor-bronze draught-proofing strip that I took off
one of my doors. It's about 1" wide, flexible and springy, and I think
it's ideal for what you want. If you want, I can chop a bit off and pop
it in the post. [I just knew it would come in useful one day.]
 
T

The Natural Philosopher

I have a battery operated model electric motor from my youth
c.1960's. It's an SEL ref: 3/1262. From t'internet searches I
understand SEL were part of Mamod, the famous model steam engine
manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped
me to understand how electric motors worked. Recently my grandson
came across it in the back of a cupboard, and I want to show him how
it works but one of the copper contact strips which rub on the
commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I
can cut out a shape approx 7mm x 22mm. Don't know where I could buy
such a small piece (I've looked at Hobby's Ltd catalogue but no joy)
or what other appliance/machine I could cannibalise.

Any ideas Thanks Pete
Peted, I have any amount of electric motors for models lying around
doing sod all.

if yu can tell me what te dimesnions of it are, if possible [ost a
picture, and what batteryu voltage it is suppsed to run on, I'll put
something in the post to you.

Ive probably got a scrap one with good brushses but blown bearings anyway.

see if it resembles any of these

http://www.shaman.co.uk/models/cans/




--
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.
 
J

John Williamson

The said:
I have a battery operated model electric motor from my youth
c.1960's. It's an SEL ref: 3/1262. From t'internet searches I
understand SEL were part of Mamod, the famous model steam engine
manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped
me to understand how electric motors worked. Recently my grandson
came across it in the back of a cupboard, and I want to show him how
it works but one of the copper contact strips which rub on the
commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I
can cut out a shape approx 7mm x 22mm. Don't know where I could buy
such a small piece (I've looked at Hobby's Ltd catalogue but no joy)
or what other appliance/machine I could cannibalise.

Any ideas Thanks Pete
Peted, I have any amount of electric motors for models lying around
doing sod all.

if yu can tell me what te dimesnions of it are, if possible [ost a
picture, and what batteryu voltage it is suppsed to run on, I'll put
something in the post to you.

Ive probably got a scrap one with good brushses but blown bearings anyway.

see if it resembles any of these

http://www.shaman.co.uk/models/cans/
I'd say it's one of these:-

http://s252.photobucket.com/user/lmarsh/media/IMGA0225_edited.jpg.html
 
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T

The Natural Philosopher

The said:
I have a battery operated model electric motor from my youth
c.1960's. It's an SEL ref: 3/1262. From t'internet searches I
understand SEL were part of Mamod, the famous model steam engine
manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped
me to understand how electric motors worked. Recently my grandson
came across it in the back of a cupboard, and I want to show him how
it works but one of the copper contact strips which rub on the
commutator is broken and bent so I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I
can cut out a shape approx 7mm x 22mm. Don't know where I could buy
such a small piece (I've looked at Hobby's Ltd catalogue but no joy)
or what other appliance/machine I could cannibalise.

Any ideas Thanks Pete
Peted, I have any amount of electric motors for models lying around
doing sod all.

if yu can tell me what te dimesnions of it are, if possible [ost a
picture, and what batteryu voltage it is suppsed to run on, I'll put
something in the post to you.

Ive probably got a scrap one with good brushses but blown bearings
anyway.

see if it resembles any of these

http://www.shaman.co.uk/models/cans/
I'd say it's one of these:-

http://s252.photobucket.com/user/lmarsh/media/IMGA0225_edited.jpg.html
Oh? sweet! a real 'educational' motor then..

yerss..might have something that would repair that..i'll have a look


this is a 'speed 400' end bell with two phosphor springs that actually
have proper carbon brushes on them.

http://vps.templar.co.uk/Odds and Ends/speed400endbell.JPG

about 20mm diameter

yours if its any use.



--
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.
 
D

Dave Liquorice

I've got some old phosphor-bronze draught-proofing strip that I took off
one of my doors.
http://atomicstrip.com/

Damn good stuff, inherited a roll of it from my father, who may have
inherited from my grandfather...
It's about 1" wide, flexible and springy, and I think it's ideal for
what you want.
Yep I agree springy and thin (cut and hammered copper pipe, WTF!).
If you want, I can chop a bit off and pop it in the post. [I just knew
it would come in useful one day.]
I was goig to offer as well but I don't know where it is ... I know I
haven't slung it out, far too useful.
 
I

Ian Jackson

Dave said:
http://atomicstrip.com/

Damn good stuff, inherited a roll of it from my father, who may have
inherited from my grandfather...


Yep I agree springy and thin (cut and hammered copper pipe, WTF!).
Of course, a similar product is available in plastic - but I doubt if
would work very well in this application!
If you want, I can chop a bit off and pop it in the post. [I just knew
it would come in useful one day.]
I was goig to offer as well but I don't know where it is ... I know I
haven't slung it out, far too useful.
I know exactly where mine is (I went out and checked that it was where I
thought it was - in the garden shed). If the OP wants a bit, just email
to my corrected address.
 
F

F Murtz

harryagain said:
I have a battery operated model electric motor from my youth c.1960's. It's
an SEL ref: 3/1262. From t'internet searches I understand SEL were part of
Mamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to
understand how electric motors worked. Recently my grandson came across it
in the back of a cupboard, and I want to show him how it works but one of
the copper contact strips which rub on the commutator is broken and bent so
I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut
out a shape approx 7mm x 22mm. Don't know where I could buy such a small
piece (I've looked at Hobby's Ltd catalogue but no joy) or what other
appliance/machine I could cannibalise.


Cut up some copper water pipe.
Seems to be an echo in here.
 
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F

F Murtz

Dave said:
http://atomicstrip.com/

Damn good stuff, inherited a roll of it from my father, who may have
inherited from my grandfather...


Yep I agree springy and thin (cut and hammered copper pipe, WTF!).
He was just asking for a source not advisability.
If you want, I can chop a bit off and pop it in the post. [I just knew
it would come in useful one day.]
I was goig to offer as well but I don't know where it is ... I know I
haven't slung it out, far too useful.
 
H

harryagain

The Other Mike said:
No he's far thicker
Tch.
You are pretty thick.
You cut a small piece out and rub it down on a piece of emery cloth secured
to the bench.
I don't believe the 0.1 is right anyway, that would be foil and have no
strength at all.
 
H

harryagain

John Williamson said:
+1

Copper brushes on a copper commutator are not a good idea.
They aren't but I remember a motor I had back in the sixties with this
arrangement.
They were crap. He'd be better to get a modern one, far more power and
longer lasting.


Or get one out of a car, windscreen wiper, window lift or wing mirror for
tiny ones
 
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B

Brian Gaff

Is this black withe a little nylon gear on it?
I seem to recall the bruses were not copper, but berrilium copper with
small carbon inset pieces in them.
Normally they lost their carbon bits and the strip then broke where it
used to be.

If all you want to do is to get it sort of working almost anything springy
and conductive will do, piano wire etc, but the commutator will wear fast
and it will spark a lot!

Brian

--
From the Sofa of Brian Gaff Reply address is active
I have a battery operated model electric motor from my youth c.1960's. It's
an SEL ref: 3/1262. From t'internet searches I understand SEL were part of
Mamod, the famous model steam engine manufacturers.

It used to give me lots of fun when "I were no'but a lad" and helped me to
understand how electric motors worked. Recently my grandson came across it
in the back of a cupboard, and I want to show him how it works but one of
the copper contact strips which rub on the commutator is broken and bent so
I want to make a new one.

I need a small piece of flat copper, approx 0.1mm thick from which I can cut
out a shape approx 7mm x 22mm. Don't know where I could buy such a small
piece (I've looked at Hobby's Ltd catalogue but no joy) or what other
appliance/machine I could cannibalise.

Any ideas
Thanks
Pete
 

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