Thread: Can I get Custom Lathe Work Done?

We call that 'axle' a shaft. Not welding is a Good Idea. You would have to balance the completed assembly. An engine builder who advertises balancing work could do it. But he will need somewhere he can remove material from.

Originally Posted by Bryan

We call that 'axle' a shaft. Not welding is a Good Idea. You would have to balance the completed assembly. An engine builder who advertises balancing work could do it. But he will need somewhere he can remove material from.

Sorry for the incorrect terminology. Learn something new every day.

If the outer tube was thick enough he could remove some of the steel from the inner side?

Tonight after work/training I will draw up some detailed Visio diagrams of exactly what I want done. I will make it as simple as possible so less work is involved. Some finalised details:

- The rotor needs to be as close to a single piece of material as possible. If it's cheaper then 3 individual pieces can be welded together so long as the weld is very strong and the item is re-turned (is that the right word) and finished to look semi professional

- The material needs to be mild steel. Mild is important because of it's low carbon content. I'm not a hippy - it just has a low reluctance which is desirable when using magnets.

I'm not sure where I could find a piece of mild steel large enough for the rotor to be made from a single piece but I will start looking. If anyone knows somewhere good to go please let me know.

Once the designs are up, and anyone thinks they can do it please let me know and we can talk prices for your time. I have NO idea what to expect so I may be scared off (or rather go back to the drawing board lol) so please be patient with me. As I've stated many times this is new territory for me.

Sourcing material would best be left to the maker.
Makeing it in one piece should not be a problem.
Is the finished OD with magnets attached or just the machined rotor.

The finished OD will be without magnets. Because I'm wrapping it in Carbon Fiber I have allowed 5mm for the magnets + CF (magnets are 3.2mm high).

So if the desired overall OD is 108mm, the OD of the rotor minus magnets will be 98mm (5mm each side).

I need to confirm all numbers I have written here however this will be done when I draw the detailed diagrams.

Cheers.

When you do your final calcs and or drawing you may need to do two,
one using the single magnet and the other using your 3 magnet model,as the depth of the flat for the magnet to attach too will differ resulting in a bigger finished od with magnet and C/F attached,I think.

I have done some preliminary drawings. The way I did them was to draw a circle with a diameter matching the maximum allowable amount and worked backwards.

This has resulted in as you have mentioned - the depth for the totally flat magnet is larger than for the 3 flat design. This is because the greater width of the single flat cuts further into the rotor surface.

It makes sense in my head anyway. My drawings are normally accurate enough that I'm not too worried about stuffing it up ;-)