Millyard's Inductive Heater

Tornado · Feb 4, 2025

Andy Millard has an interesting use of an inductive heater coil for bending metal bars....

Triton Thrasher · Feb 4, 2025

If ever I find myself in a bending metal bar, I finish my drink and leave.

daveforty · Feb 5, 2025

Eddy Current Heater; in years gone by there were a load of then in a factory where I worked. The induction coil is water cooled, made of a length of copper tube. It was common for them to stop working when the water circulation packed up, either low water level or the the water pump wasn't working. Regular trip for us apprentii was to the plating shop for a bucket of demineralised water to top them up. Frightening machines - valves (tubes in American) the size of milk bottles (or larger) where the connections were made with nuts & bolts onto braids, and all in a cabinet 6ft cubed. High voltages and high frequencies, working on them was scary. Used to have to put coins in the panel interlock switches so they could be operated with the side panels off in order to try and fault find. Was glad to leave that place. (it is now a Tudorbethan executive housing estate)

Tornado · Feb 5, 2025

The gizmo Millyard used in the video could come in very handy for someone making or repairing bike frames. Could even help de-droop the rear frame hoops on our Commandos.

Richard Tool · Feb 5, 2025

Tornado said:
The gizmo Millyard used in the video could come in very handy for someone making or repairing bike frames. Could even help de-droop the rear frame hoops on our Commandos.

I was thinking the same but are there two piece units to enable getting the coil around a closed loop ?

baz · Feb 5, 2025

Richard Tool said:
I was thinking the same but are there two piece units to enable getting the coil around a closed loop ?

Yep
If you have a hacksaw or an angle grinder with a slitting disc
Or a recip ect

Tornado · Feb 5, 2025

Richard Tool said:
I was thinking the same but are there two piece units to enable getting the coil around a closed loop ?

Here is how I de-drooped my bike:

Thread 'Rear Frame Hoop De-Drooper'

Mar 1, 2019

With the mudguard off for other work, decided to have a go at my droopy rear hoop. Noted the underside of mudguard was showing signs of tire rubbing.
Design requirements were to not require lashing bike down to floor since I do not have any lift or tie down points etc.

Pics worth a thousand words:

Was concerned how much force would be necessary and had a backup plan to place a bottle or scissor jack under the long stud and lift it up against the clamped section. But the nuts and thread did it easily. The hoop was roughly 28" from floor level at the...

speirmoor · Feb 6, 2025

Richard Tool said:
Richard Tool said:

I was thinking the same but are there two piece units to enable getting the coil around a closed loop ?

Click to expand...

Yes. The coils separate from the device. Most of the handhelds now come with a selection of coil sizes included and usually an extra length that you can make a custom one for whatever you need.

Richard Tool · Feb 6, 2025

I understand that the coils separate from the hand piece and that the coils are available in differing diameters - my point is how does one insert the piece to be heated through the coils if the workpiece is a closed loop without cutting either the workpiece or the heating coil open ?

speirmoor · Feb 6, 2025

Its solid copper, flexible and easily formed

Richard Tool · Feb 6, 2025

speirmoor said:
Its solid copper, flexible and easily formed

I now see - thanks for your help !

Tornado · Feb 6, 2025

And I suppose worth mentioning, my understanding is these can only be used on ferrous metals, alu etc will not heat up via induction...just like the inductive cook tops common in European kitchens.they need to be rid of alu pots and pans, only steel, cast iron will work.

acotrel · Feb 6, 2025

Australia's industrial safety laws are now risk-based instead of prescriptive in every jurisdiction. So do not get too clever.

Millyard's Inductive Heater

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