back chuck on mini lathe

RocketQ

RocketQ

It's Not Rocket Science
Silver Member
Any one put a back chuck on a mini lathe? I am looking at doing 2 things opening up the hole through the spindle to allow the joint of a shaft and setting a chuck on the back. I am going to pick up the lathe today and if at all possible the parts I need to finish it up this weekend. Most of the mini lathes have a 3/4 hole. I don't know if there is enough room to open up to 0.900..
Any input would be great.
Sorry the question is will I have enough stock on the spindle to open up to 0.900" and be able to still mount the chuck on the back?
 
Well, that's the BIG question. Is the spindle wall thick enough to bore it to .900"? Personally, I don't believe it is though I could be wrong. You spoke of a rear chuck on this lathe. Bare in mind that the spindle length of these minis is only around 12" or so, so you still have a significant length of the shaft hanging out in space. In this instance, centrifugal force is not your friend. Supporting the shaft further back from the lathe may be a better way to go. I'll post a pic when I get back from my shop.

No need for my pics as there is a thread currently running that illustrates what I'm referring to :
http://forums.azbilliards.com/showthread.php?t=84468
 
Last edited:
RocketQ said:
Any one put a back chuck on a mini lathe? I am looking at doing 2 things opening up the hole through the spindle to allow the joint of a shaft and setting a chuck on the back. I am going to pick up the lathe today and if at all possible the parts I need to finish it up this weekend. Most of the mini lathes have a 3/4 hole. I don't know if there is enough room to open up to 0.900..
Any input would be great.
Sorry the question is will I have enough stock on the spindle to open up to 0.900" and be able to still mount the chuck on the back?
Click to expand...

Yes(?) but,
few joints are bigger than .850, so you could always stick the shaft
into the chuck from the front. Besides, the hole-thru of the chuck
is only 5/8. Don't know if you can bore the chuck out as much
as you would need to.
In addition, the end of the shaft will still not be stabilized due to over
hang. If you build an accurate enough set up, you won't need
a rear chuck.

My best guess would be, I doubt the feasability. You might be able
to put on something like a Unimat chuck.

Google mini lathe - there is a site called something like
'mini lathe com' with links to every conceivable mod to a mini,
one of which IIRC deals with the max bore-out of the spindle.
Also there are yahoo groups that have members who would
know for sure IMO

BTW all the 7 x nn lathes use the same spindle,seeing as how
they are all made in the same factory in China.

Dale
 
pdcue said:
Yes(?) but,
few joints are bigger than .850, so you could always stick the shaft
into the chuck from the front. Besides, the hole-thru of the chuck
is only 5/8. Don't know if you can bore the chuck out as much
as you would need to.
In addition, the end of the shaft will still not be stabilized due to over
hang. If you build an accurate enough set up, you won't need
a rear chuck.

My best guess would be, I doubt the feasability. You might be able
to put on something like a Unimat chuck.

Google mini lathe - there is a site called something like
'mini lathe com' with links to every conceivable mod to a mini,
one of which IIRC deals with the max bore-out of the spindle.
Also there are yahoo groups that have members who would
know for sure IMO

BTW all the 7 x nn lathes use the same spindle,seeing as how
they are all made in the same factory in China.

Dale
Click to expand...
Yes Dale is right i was told long ago they are all made in same factory.
I wonder if the different color paint and stickers for the different companies make one run better than the other ;)
The minilathe groups have lots of info I would signup and start asking questions.:)
 
Spindle Bore

That spindle bore is a #3 Morris Taper, I bored mine out to fit 7/8" bars for my caps.
 
yep

pdcue said:
Yes(?) but,
few joints are bigger than .850, so you could always stick the shaft
into the chuck from the front. Besides, the hole-thru of the chuck
is only 5/8. Don't know if you can bore the chuck out as much
as you would need to.
In addition, the end of the shaft will still not be stabilized due to over
hang. If you build an accurate enough set up, you won't need
a rear chuck.

My best guess would be, I doubt the feasability. You might be able
to put on something like a Unimat chuck.

Google mini lathe - there is a site called something like
'mini lathe com' with links to every conceivable mod to a mini,
one of which IIRC deals with the max bore-out of the spindle.
Also there are yahoo groups that have members who would
know for sure IMO

BTW all the 7 x nn lathes use the same spindle,seeing as how
they are all made in the same factory in China.

Dale
Click to expand...
My finish joint size is 0.855. I can get "A" chuck to work to 1" if need be not necessarily the one that came with the lathe. I just don't want to "have" to make a spindle.
 
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Darrin makes a hub that allows you to thread it right to the back of the mini lathe and also an extention bar for cleaning shafts for cue repair. these 2 items work great on the mini lathe. darrin does produce a few of these and they are for sale on order. thanks shari@hillscues.com please feel free to email me with any questions or interest! thanks
 
Hillscues,
Thanks for the reply. I was looking for a quick mod to do this. And it looks like that will do the trick. Thanks..

KJ Thanks again.
 
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