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M39x4 Spindle

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Parrot62:
Hi,

I am new to the forum, just bought my first Wood lathe, (Old like me)  and started to upgrade it.
My spindle size is M39x4 It seems this is a very uncommon size!

Can anyone help me find an adapter, or chuck that I can fit to this lathe.
My lathe has a 3jaw chuck but I am looking for a 4jaw chuck fit for doing bowls safely or a spindle adapter.

Best regards,
Robert

John:
Hello Robert
Type M39X4 into your search engine
I have just done this and there is information about adaptors etc
.John

Twisted Trees:
What lathe is it? 

I would be inclined to either go to the lathe manufacturer to see what chuck options there are. OR go to a machine shop and have an adaptor made to convert it to m33 x 3.5. Which opens up lots of options.

BrianH:
The mention of a 3 jaw chuck leads me to wonder if this is actually a metal lathe. If that is the case the jaws are likely to be rather skinny, compared to a woody chuck, but, given you allow plenty of wood for it to grip you should be able to turn a bowl with it. Alternatively mount a piece of scrap in the chuck and proceed using old school methods of friction drives. Bowls were turned successfully for centuries before the chuck was invented!
All the best with it
Brian

Parrot62:
Hi,

Many thanks for the advice received so far. I have been searching options on google for a few weeks yet, but not with a concrete solution.

1. I have a couple of enquires for a custom spindle adapter M39 to M33 this would then give me a wide range of options on chucks.
2. I found a M39 backplate from Shars but their 4jaw chuck (metal working type) doesn’t have wood type jaws as an option. I have asked them if it is possible to replace them with 3rd party ones.
3. My preferred is the versachuck, it accepts the backplate i found (might need some machining) but it is out of stock at Toolpost so I’m searching for a 2nd hand one. The versachuck is true to its name, its very versatile with lots of accessories.
4. Another great solution is Oneway, a great chuck. Lots of accessories. I have asked them if they can do a custom adapter.

Many open enquires, non concrete as yet.

My lathe is old, no manufacturer label visible, solid and way too heavy for me to move. it has a 14” swing. The 3 jaw chuck is limiting me, although I have done quite a few bowls and boxes I’ve had quite a few of them come flying off.
It’s my first lathe so I wasn’t really clued up on what to look out for.

Cheers,
Robert

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