Spindle adaptor

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Forum topic by K02Purdy posted 12-16-2015 06:22 PM 767 views 0 times favorited 6 replies Add to Favorites Watch
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2 posts in 918 days

12-16-2015 06:22 PM

Topic tags/keywords: wood lathe spindle spindle adapter help


I am very new to wood turning and am having a difficult time trying to figure out the actual size of my spindle. The wood lathe is a very cheap, China made, 1/2 HP w/ no serial or model number. It was an early X-mas gift from the wife. I know the rule ‘you get what you pay for’, but just getting into this and all the associated cost up front drove me to pick a cheap model so if, by chance, I don’t get into this like i think i will, at least i will have a useful tool for small projects, or am not out very much money.

I have heard Penn State industries and Teknatool make spindle adapters to fit ‘off-size’ lathes so i can get the more common thread pattern, 1” x 8TPI, as i am wanting to get the Nova 3G 4 jaw chuck. My problem is i cannot figure out this thread pattern. Pics uploaded in both Metric and US of measurements. If someone could please tell me what i am working with, I would greatly appreciate it. I have sent several emails to multiple companies who make these, but no one is responding and i am anxious to get this tool so i can have more options in turning, bowls, etc….

6 replies so far

View MrUnix's profile


6766 posts in 2225 days

#1 posted 12-16-2015 06:30 PM

Can’t tell if it’s a metric or SAE thread… might be a 5/8 or 3/4 X 12TPI, but difficult to tell. And given it’s an asian import, may very well be metric. Do you have a tap and die set? Would be easy to determine with a thread gauge. Another alternative would be to find a nut that fits on the spindle, either from scrounging in your garage (if you have a stash like I do, that would be easy!) or getting an assortment of ‘maybe’ sizes from your local hardware store.


-- Brad in FL - In Dog I trust... everything else is questionable

View HokieKen's profile (online now)


5253 posts in 1164 days

#2 posted 12-16-2015 08:34 PM

Sure appears to be metric. M18 X 2. The closest SAE would be 11/16-12 but the major diameter is a bit big for that and the thread pitch is quite a bit off. The diameter and pitch are just about dead on for the metric thread though. Easiest way to tell is see if you can find a nut somewhere (Fastenal, Hardware store) and see if it fits or use a die like Brad said ^ if you have one that size. If you can’t do either of those, pick up a 12 tpi SAE bolt/screw (diameter doesn’t matter) and a metric bolt/screw with a 2mm pitch. Lay the bolts on your threads and see which one interlocks perfectly.

-- Kenny, SW VA, Go Hokies!!!

View K02Purdy's profile


2 posts in 918 days

#3 posted 12-16-2015 08:42 PM


Thank you both for the reply. My closest match, by researching, leads me to believe it is M18×2 as well. I have made it by 4 different hardware stores(Fastenal, Ace, NAPA, and another) and everything jumps from M16 to M20, so i can’t find a nut to buy, so that was one of the main reasons for posting here. I think i will go buy a thread gauge today to get to the bottom of it.

Either way, appreciate the responses. Quickest I’ve got from anyone. Will update if I find out for anyone else that might come in this predicament.

View woodbutcherbynight's profile


4859 posts in 2435 days

#4 posted 12-17-2015 02:22 AM

Try an Ace Hardware, I have one up the street and they have the oddest of hardware you would not believe anyone would have. May take a minute to find it but take longer than normal to look and I bet you find a nut that size.

-- Live to tell the stories, they sound better that way.

View David Taylor's profile

David Taylor

326 posts in 1113 days

#5 posted 12-17-2015 03:23 AM

Another idea might be to send these pics to Teknatool – I have found them to be very helpful. Might help that I am a Nova lathe owner, but they helped me before I bought it, too.

-- Learn Relentlessly

View Woodknack's profile


11792 posts in 2406 days

#6 posted 12-17-2015 04:03 PM

Oneway makes adapters for every size. Measure close as you can then look at their website for the closest size. Another way is remove the spindle (probably easier than you think) take it to a hardware store and try some nuts.

edit: looks like M18-2.5 to me.

-- Rick M,

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