Yes and yes.
The number of turns and wire size are the important criteria. What voltage is it?

Robert.

I’d reproduce it based on the diameter of the wire and the size of the spool.

• Break into the winding and measure the diameter of the wire.
• Buy a reel of magnet wire of about the same diameter.  SWG/AWG or metric should all be ‘near enough’.
• 3D-print a new spool to fit the electromagnet.  Or make from thin cardboard or plastic sheet.
• Wind magnet wire on to the spool until it’s suitably full.
• Secure with glue or whatever.

Though a coil-winder is best because they are controllable, you can use a lathe to wind the wire.

• The magnet wire reel should be on an axle stand so it unwinds as the wire is pulled off.
• low rpm
• steer wire layers onto the spool and gently maintain tension with fingers.
• have some way of stopping the lathe without losing control.  Maintain tension at the end otherwise coils spring off in a last minute panic!  Foot switch or assistant.   The assistant can secure the winding with electrical tape whilst the driver holds the wire.

You can guess how I know it can all go horribly wrong in the last 10 seconds whilst coil winding on a lathe…

🙁

Dave

It will be epoxy potted so unlikely to come apart in one piece. Replicate the bobbin / former and fill with same size wire to the same depth. Being a 24V DC coil it will be reasonably thick wire and not very critical.

I think the closest to that would be something like this.

Rob

Links to https://cpc.farnell.com/multicomp-pro/ecwo-25/33swg-enamelled-copper-wire/dp/CB01216?st=enamelled%20copper%20wire

Edit – Robert types faster than me, and then I’ve been messing about editing it 🙂

Just a thought – Robert mentioned potting.  This is done because the wires move when the coil is energised, and the forces in a 24V 10A winding are strong enough to damage it.  Loose wires break due to metal fatigue or the insulation chafes.   Therefore wind tight enough to stop them moving and/or apply some glue as each layer is completed.

Not sure what the best glue is!  Not super-glue.  I smeared hot glue because it contains no solvents, but my sample size is too small, and the electromagnet too lightly stressed, to confirm it was a good choice. Hasn’t failed yet…

The old coil may have failed because a wire was able to move inside the winding enough to rub.  Potting is supposed to stop the movement and corrosion, but it doesn’t always penetrate completely.  Also, it keeps heat in which can cook the insulation if the coil left on for too long.  Modern magnet wire is much better than older wire – many improvements to the chemistry and how the insulation is applied without air-bubbles.

Dave

On 5 November 2025 at 20:26 Wade Beatty Said:

…Any tips on where to purchase proper magnet wire?

Thanks to all

Wade

I get mine from brocott.co.uk

Remember you can get self bonding winding wire, though you need to be sure you have the means to do the process successfully. Although fully impregnated varnish (vacuumed) is likely best, nowadays quite a lot of motors use self bonding wire, apparently with adequate reliability and life.