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Any problems with using a spindle adaptor?

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Forum topic by Oprod posted 12-27-2019 09:27 PM 620 views 0 times favorited 12 replies Add to Favorites Watch
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Oprod

4 posts in 775 days


12-27-2019 09:27 PM

So my Vega lathe is about a15” inboard and probably about a 30” outboard. I was thinking about using a Nova Titan chuck, because it will work with nearly all the jaw choices available from Nova. Anyhow the chuck only comes with a threaded size of 1 1/4”x 8”. My existing spindle is 1”x8. The adaptors available seem to extend the chuck farther away from the head stock. Of course bearings are replaceable if they wear out. Any other problems with proceeding down this path other then another thread that could unwind. I plan to install Alan head screws so I can reverse spin.


12 replies so far

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Phil32

1586 posts in 1147 days


#1 posted 12-27-2019 09:34 PM

The unwinding on the outboard side was the first problem that came to mind. With 30” throw, the forces acting on the adapter and set screws will be significant. Will the Nova Titan chuck handle those lateral forces okay?

-- You know, this site doesn't require woodworking skills, but you should know how to write.

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Hockey

182 posts in 1656 days


#2 posted 12-27-2019 09:56 PM

I use an adapter on my Jet 1221 (1”) to go to 1/ 1/4” chucks. The adapter I have was obtained at Craft Supplies USA and it does not extend far. No issues with mine. It is basically a nut with 1” threads on inside and 1 1/4” thread on the outside. Go to woodturnerscatalog.com (Craft Supplies USA) and look up spindle adapters. You can choose a size, and it will show a different picture. You will see that the 1 1/4” down to 1” size extends the chuck out quite a bit further, unlike the 1” to 1 1/4”..

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Phil32

1586 posts in 1147 days


#3 posted 12-27-2019 11:49 PM

Hockey – Woodturning on an outboard spindle (left end of head stock) usually requires left handed thread or some means of locking the thread. Most (all?) adapters are right hand thread.

-- You know, this site doesn't require woodworking skills, but you should know how to write.

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Phil32

1586 posts in 1147 days


#4 posted 12-27-2019 11:51 PM

Hockey – Woodturning on an outboard spindle (left end of head stock) usually requires left handed thread or some means of locking the thread. Most (all?) adapters are right hand thread. I also have no problems with the adapter in the normal (over the bed rails) application.

-- You know, this site doesn't require woodworking skills, but you should know how to write.

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Hockey

182 posts in 1656 days


#5 posted 12-28-2019 12:17 AM


So my Vega lathe is about a15” inboard and probably about a 30” outboard. I was thinking about using a Nova Titan chuck, because it will work with nearly all the jaw choices available from Nova. Anyhow the chuck only comes with a threaded size of 1 1/4”x 8”. My existing spindle is 1”x8. The adaptors available seem to extend the chuck farther away from the head stock. Of course bearings are replaceable if they wear out. Any other problems with proceeding down this path other then another thread that could unwind. I plan to install Alan head screws so I can reverse spin.

- Oprod

Phil, I didn’t notice a reference to outboard. In fact, looking at the original post again, I don’t see that he says he intends to use it outboard, although maybe my reading comprehension is lacking. I was referring to standard inboard turning and spindle adapters in general as my focus was on any issues with wobble or runout that might be created by a spindle adapter. I know nothing about outboard turning.

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Phil32

1586 posts in 1147 days


#6 posted 12-28-2019 01:16 AM

Yes, Hockey, it isn’t clear other than the brief mention of the outboard capacity of his lathe. In the last sentence he says “reverse spin.” If the headstock pivots around, the drive would be reversed.

-- You know, this site doesn't require woodworking skills, but you should know how to write.

View mike02719's profile

mike02719

306 posts in 5029 days


#7 posted 12-28-2019 01:18 AM

You should not have any issues because you will be replacing the bigger bushing for a smaller one. Same distance from the headstock. I think they all come with provisions to lock in place for reversing direction.

-- Mike, Massachusetts

View LeeMills's profile

LeeMills

702 posts in 2545 days


#8 posted 12-30-2019 12:00 AM

Here is a chart from Teknatool on their jaws and chucks. As you can see the only jaws listed “not recommended” for the Supernova2 are the Titan powergrips. It does take the standard powergips as well as the 130mm bowl jaws which are the same diameter as the Titan Powergrips.
https://www.teknatool.com/wp-content/uploads/2016/10/NOVA-Standard-Jaws-Min-Max-Ranges-Jaw-Table-inch.pdf

You may be planning on turning something really really big but the SN2 will handle most everything. But you may be planning on turning a hollow form 14” diameter and 20” deep, if so you will need the Titan chuck.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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OSU55

2830 posts in 3233 days


#9 posted 01-05-2020 03:13 PM

There are 2 types of spindle adapters 1) spindle larger than chuck – extends chuck ~ 2” off end of the spindle, bigger spindle cannot fit into smaller chuck hole. 2) spindle smaller than chuck – reducer bushing, adds maybe 3/8” vs a chuck that threads directly on. #2 is what you need. I think the Nova insert type chucks are threaded 1-1/2×8tpi, and Nova sells reducer type adapters for smaller spindle threads, and their reducers have set screws (as do their chucks) to prevent the chuck from unwinding when operating in reverse or electronic braking on evs lathes. Any adapter/reducer can be drilled and tapped for a set screw to do the same.

View Jack Lewis's profile

Jack Lewis

576 posts in 2322 days


#10 posted 01-05-2020 03:54 PM


The unwinding on the outboard side was the first problem that came to mind. With 30” throw, the forces acting on the adapter and set screws will be significant. Will the Nova Titan chuck handle those lateral forces okay?

I use an adapter on my Jet 1221 (1”) to go to 1/ 1/4” chucks. The adapter I have was obtained at Craft Supplies USA and it does not extend far. No issues with mine. It is basically a nut with 1” threads on inside and 1 1/4” thread on the outside. Go to woodturnerscatalog.com (Craft Supplies USA) and look up spindle adapters. You can choose a size, and it will show a different picture. You will see that the 1 1/4” down to 1” size extends the chuck out quite a bit further, unlike the 1” to 1 1/4”..
- Hockey

The spindle adapter mentioned does not have facilities for a set screw so reverse turning is inadvisable. I have it only to adapt a 1” live center to 1 1/4” and mating two rings or parts on dead center.

-- "PLUMBER'S BUTT! Get over it, everybody has one"

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Jack Lewis

576 posts in 2322 days


#11 posted 01-05-2020 04:00 PM

double post

-- "PLUMBER'S BUTT! Get over it, everybody has one"

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Yrag

3 posts in 641 days


#12 posted 01-19-2020 05:04 PM

Can anyone tell me the TPI on the head spindle for a Sears vintage lathe #101.06242? Thanks.

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