I Need a Steel Shaft Adapter Made

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xcvator

xcvator

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'm hoping that someone on here can help me with a small fitting and turning job in steel. Last week I bought a new "proper" motor for the slant cabber which will need an adapter for the spindle to take the 1/2" whitworth threaded shaft.
I have the drawing for the motor shaft.

https://www.prospectingaustralia.com/forum/doc/member-docs/8322/1596506159_s.37b4-a.pdfI

Not wanting a freebie, happy to pay

Blasted full lock down has stuffed me from getting it done from a business anywhere in Melbourne 8.(
 
limpalot said:
Weld a bolt onto the shaft.
Click to expand...

nah . shaft is likely to be high carbon steel and they dont tolerate welding as a successful venture , not likely to be precisely aligned axially either :)
 
Are you going to fit a flexible coupling to the motor before it connects to the shaft ?

You will probably get a flexible coupling that will fit on the motor shaft on one end and lock on the cabber shaft on the other.

I sold my lathe before COVID so i cant make it however there might be an off the shelf coupling adaptor available.

Just to confirm , the 1/2" whitworth thread is on the cabber ? , is it male or female thread and what size is the shaft the thread is on ?

**
Can you post a photo of the cabber shaft ?

**

some examples here
http://www.tonson-motor.com.au/Product_Details.aspx?proCode=Flex Couplings

ps , you dont direct couple a drive motor unless it has a machined flange mounting to match the driven end , you can never get 100 % perfect axial or radial alignment , which is why a flex coupling is used.

photos of the driven end would be good.
 
Since you're getting into the swing of things with your cabbing, I think it is worth having a think about going to pulley drive.

If you're getting a shaft made, set it up so it is longer and runs through a couple of flange mount self lubricating bearings, yep it will take a few mods to your frame, but then your polishing rig is independent of the motor, and driven via a v-belt, no flex couplings etc, plus yu can put a bit more force on the laps if you need to.

As I mentioned, you can also vary the speed via the pulleys https://www.gemcuts.com.au/Gemmasta-3-Step-Pulley-Set one fits the motor and one your shaft.

This will allow your laps to run smoothly with zero plex and no load on the motor bearings etc.
 
I could make the adapter for you but as above advice it will most likely vibrate it self to pieces.
 
Dihusky said:
Since you're getting into the swing of things with your cabbing, I think it is worth having a think about going to pulley drive.

If you're getting a shaft made, set it up so it is longer and runs through a couple of flange mount self lubricating bearings, yep it will take a few mods to your frame, but then your polishing rig is independent of the motor, and driven via a v-belt, no flex couplings etc, plus yu can put a bit more force on the laps if you need to.

As I mentioned, you can also vary the speed via the pulleys https://www.gemcuts.com.au/Gemmasta-3-Step-Pulley-Set one fits the motor and one your shaft.

This will allow your laps to run smoothly with zero plex and no load on the motor bearings etc.
Click to expand...

Wish I could but I simply cannot afford to go that way, nor do I have the bench space. Just a fact of life
 
Will your variable speed drive have enough grunt to run the new motor ?

Do the expert cabber folk use different RPM for different grit # or for different stone types ?
 

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