Store Locator
Grouped product items
Product Price Qty
Nova Insert/Adapter, 3/4" 16-TPI UNF RH with 6mm Register
Nova Insert/Adapter, 3/4" 16-TPI UNF RH with 6mm Register Item #47239
In stock
$26.99 Each
Nova Insert/Adapter, 1" 8-TPI RH/LH Dual Thread
Nova Insert/Adapter, 1" 8-TPI RH/LH Dual Thread Item #45516
In stock
$26.99 Each
Nova Insert/Adapter, 1" 8-TPI RH
Nova Insert/Adapter, 1" 8-TPI RH Item #48443
In stock
$26.99 Each
Nova Insert/Adapter, 7/8" 14-TPI RH
Nova Insert/Adapter, 7/8" 14-TPI RH Item #43801
In stock
$26.99 Each
Nova Insert/Adapter, 1-1/4" 8-TPI RH
Nova Insert/Adapter, 1-1/4" 8-TPI RH Item #45402
In stock
$26.99 Each
Nova Insert/Adapter, Blank, Unthreaded
Nova Insert/Adapter, Blank, Unthreaded Item #46298
In stock
$26.99 Each
Nova Insert/Adapter, 1-1/4" 8-TPI UNS RH
Nova Insert/Adapter, 1-1/4" 8-TPI UNS RH Item #48758
In stock
$26.99 Each
Nova Insert/Adapter, 5/8" Plain Bore
Nova Insert/Adapter, 5/8" Plain Bore Item #43743
In stock
$26.99 Each
Nova Insert/Adapter, 1" 12-TPI UNF RH
Nova Insert/Adapter, 1" 12-TPI UNF RH Item #49301
In stock
$26.99 Each
Nova Insert/Adapter, 1" 8-TPI Dual-Threaded RH Reversible
Nova Insert/Adapter, 1" 8-TPI Dual-Threaded RH Reversible Item #47163
In stock
$26.99 Each

Get Expert Advice

Return Policy

Nova Chuck Inserts/Adapters

Item #
86% of 100
Teknatool uses an easy and inexpensive insert/adapter system on all insert-style Nova chucks. The inserts are available with a variety of thread patterns on the interior, but all have the same exterior thread to fit all your Nova chuck(s). Just check the manual of your lathe to find the threading of your headstock spindle and purchase the corresponding adapter. Once the insert is in place, threading the chuck onto your lathe is a simple matter. The insert system also guarantees that you'll still be able to use your Nova chucks, even if you upgrade or change lathes later. If an insert/adapter is not available to match your lathe, you can have one threaded from a Blank Insert/Adapter (#46298, sold separately). Also see our Chuck Spanner (#49013, sold separately), which is useful for tightening the inserts in place.


  • Adapts any Nova chuck to almost any lathe spindle at low cost.
  • All insert-style Nova chucks (apart from the obsolete Compac chuck) use the same insert/adapter system to ensure maximum adaptability and flexibility for the user.
  • Large range of inserts to fit many different popular lathe models (see below).
  • Inserts are threaded both inside and out. Outside thread is made to fit into the Nova Chucks. The inside thread comes in a variety of sizes; the one you need will depend on what lathe you have.
  • Note: Directly threaded chucks cannot be adapted to insert-style chucks.
  • Nova Insert/Adapter, 1-1/4" 8-TPI - Item #: 45402 is designed for Reversible lathes
(1) Nova Chuck Insert or Adapter
More Information
Brand Nova
Weight 0.7200
4.3 / 5.0
78 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works Well
Works Well
March 4, 2020
1 year ago
Woodworking Experience:
It does what it is supposed to do. Fit and finish is good, no problems.
February 21, 2020
5 months ago
Woodworking Experience:
Exactly what I needed. Works as it should.
December 28, 2019
6 months ago
Woodworking Experience:
Just what the doctor ordered
This works with the chuck with out it there is no way of mounting the chuck on an older machine like mine.
May 23, 2019
over 2 years ago
Woodworking Experience:
Great Customer Service
I bought the ISNS adapter with a Nova G3 chuck (Shopsmith lathe); however it was not a true 5/8" bore (off by 1/64"). I was able to replace it with another that worked from a different source. My review is mostly for the Rockler Customer Service; this was the easiest transaction I have ever made. A replacement from Rockler was on backorder, so I went to another provider. Rockler refunded my purchase with NO questions asked and suspended the need to return the defective adapter (Nova's fault). Thanks Renee, I have no fear of purchasing online with Rockler.
December 4, 2018
Woodworking Experience:
gotta have it
seriously you have to have the adapter or the chuck won't fit.
August 15, 2018
1 year ago
Works perfect!
Works perfect!!!
August 12, 2018
1 year ago
Woodworking Experience:
Nova adapter
According to my lathe manual I needed the 1” 8TPI. The adapter arrived quickly. It was a beautiful piece of tool. Unfortunately it was too big for my headstock. Upon research thru the internet I discovered another RTC lathe manual. This product manual shared many interesting facts. One such fact was this was a very basic lathe that was sold under several didn’t brands. The second, was that there were different head stocks sizes available based on which one the “New brand” wanted it to use. Under specifications these are what might be on your machine, “1”x8 TPI, or 3/4”x 16 TPI or OTHER”! Well I’m waiting for the 3/4” x 16 TPI, Hoping it’s the prefect fit, because I have idea what size the “OTHER” is! Great looking product though.
July 23, 2018
1 year ago
Woodworking Experience:
Well machined
Nice looking, and fits like a glove. Like the Richardson store, the lathe guy "Dan", knowledgeable, and like the rapid shipping. Have called Rockler hdqts about technical questions( I'm a tedious detail guy.) Always patient and clear responses.
May 20, 2018
over 2 years ago
Woodworking Experience:
chuck adapter
The service I got from your service person was beyond great. He not only advised me that you did not carry that part that I actually needed but gave me the actual link to Penn State to order it from them. This part was wrong and he explained that to me and I was able to return it. Wonderful service.
April 28, 2018
over 2 years ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 55 questions Browse 55 questions and 67 answers
Why did you choose this?
Rockler Store
To hopefully fit my Shopsmith
Michael B on Aug 19, 2018
Supposedly this fits my old RTC lathe, if it does I will be able to use a Nova chuck with my lathe.
Genaro G on Jul 1, 2018
To hopefully fit my Shopsmith
Michael B on Aug 19, 2018
required for the G3 chuck
Mike on Jul 24, 2018
Supposedly this fits my old RTC lathe, if it does I will be able to use a Nova chuck with my lathe.
Genaro G on Jul 1, 2018
returning to turning as hobby
George on Jun 30, 2018
needed for nova chuck to fit my lathe
Corey S on Jun 26, 2018
It is necessary to mount this chuck on my lathe.
Keith P on Jun 13, 2018
Needed for the super nova 2 chuck
Robert L on May 14, 2018
needed this adapter and knew it would fit
George A on Apr 29, 2018
because i have a shopsmith
steve j on Apr 27, 2018
my lathe has 1 1/4 by 8
Thomas on Apr 24, 2018
needed it
Tom B on Apr 17, 2018
Need to adapt chuck to old Craftsman wood lathe, and I think this will work. Hope I am correct.
Carl on Apr 16, 2018
needed for the chuck i have.
kenneth r on Apr 16, 2018
Very good quality
Pat C on Apr 15, 2018
Fits my lathe
Howard B on Apr 10, 2018
joe e on Mar 30, 2018
needed for woodturning.
Clarence L on Mar 30, 2018
following advice of your tech-support team.
Ricky L R on Mar 28, 2018
This insert is needed for my lathe
Dan N on Mar 26, 2018
adapt to a sears lathe
Dennis G on Mar 21, 2018
needed it to fit my lathe
James S on Mar 13, 2018
For use on my HF 33 inch lathe
Christopher E on Mar 9, 2018
had to have to use g3
bobby c on Feb 18, 2018
Needed with chuck i bought
mike e on Feb 7, 2018
Seemed like a good product for the money and had good reviews.
Paul M on Feb 6, 2018
The Nova G3 Chuck I received a few weeks ago didn't fit my Craftsman Midi lathe. Needed an adapter, I hope or else I'm going to return both.
Patrick D on Jan 15, 2018
Fits my Rigid lathe
Kurt Z on Jan 4, 2018
To fit my Grizzly G1495 - Heavy-Duty Wood Lathe.
Phil K on Jan 3, 2018
Need it for the chuck
Kim L S on Jan 1, 2018
This is the chuck adapter necessary for my Jet 1221
Monte on Dec 19, 2017
TED Y on Dec 15, 2017
Have a delta wood lathe and picked up a nova headstock, need a reversible adapter (rh-lh) to attach to each end of threaded spindle
Scott M on Dec 8, 2017
need to use chuck
John on Dec 7, 2017
wood magazine rates it high
kenneth r on Nov 27, 2017
Wanted to add to an existing chuck
MIKE T on Nov 24, 2017
it was required to be able to use the chuck on my lathe
dapearson1000 on Nov 7, 2017
Good customer reviews
Chris S on Oct 13, 2017
I need it to adapt my Jet lathe for the Nova chuck.
Samuel L on Oct 2, 2017
Required for the chuck I oredered
David K on Sep 20, 2017
Rick with tech support helped me out with so much and he is a wealth of knowledge.
Tison j on Aug 9, 2017
Needed to adapt my nova chuck to my shopsmith
Stuart S on Jul 30, 2017
Necessary for mounting to my lathe
Chris B H on Jul 11, 2017
I have a Nova 1622-44 lathe
Noye on Jul 4, 2017
Bought this to go with the Nova G3 Insert Chuck which requires an insert
Michelle C on Jun 16, 2017
To fit my lathe and chuck
gene b on Apr 19, 2017
so the chuck will work in my lathe
Jay G on Apr 15, 2017
Needed to mount my Nova G3 on my Shopsmith.
William H on Apr 13, 2017
Necessary for functioning of the Excelsior Lathe
William F on Mar 9, 2017
I need the adapter to attach the Nova chuck to my mini lathe.
David W on Mar 5, 2017
New lathe needed this adapter
Daniel S on Feb 22, 2017
required for the G3 chuck
Mike on Jul 24, 2018
returning to turning as hobby
George on Jun 30, 2018
Need adaptor 3/4 16tpi to 1in 8tpi do you have one? or know were I can look thank you
Willie D on Dec 8, 2016
What adapter do I need for the Jet JWL-1221VS lathe?
GEORGE D on Dec 20, 2016
BEST ANSWER: Did you ever get an answer to our question? It looks like it will require the 1” - 8 TPI RH/LH Reversible adapter?
My headstock shaft is 1" 16 tpi. It is a
very old lathe. Can I get this adapter for a Nova chuck?
Jerry S on Sep 29, 2016
BEST ANSWER: Yes that’s what mine is works great
Which adapter do I need for a Shopsmith?
Dwayne B on Jan 29, 2016
BEST ANSWER: This was a confusing issue for me, and took me a bit of time to research, so I hope this helps someone else who owns a Shopsmith.

The Shopsmith Mark V has a 5/8" non-threaded spindle that uses a set screw to lock tools in place. Therefore you need an adapter to use NOVA G3 chucks on your Shopsmith.

NOVA, confusingly, makes two different versions of it's G3 Chuck. (An explanation of the differences can be found in the FAW on the NOVA web site). Determine which version of the G3 you have before purchasing an adapter for your Shopsmith.

For the G3 Reversible Version Chuck (NOVA 48232) that comes in this 30th Anniversary G3 Kit you'll have to go to a 3rd party to get an adapter that connects the Shopsmith's 5/8" spindle to the chuck's 1" x 8 TPI threads. As Dennis mentioned above, Penn State makes just such an adapter, the PSI L5818. Hurricane Turning Tools also makes one. I don't think Rockler has an adapter such as this.

NOVA also makes another version of the G3, that is NOT available in a 30th Anniversary Kit. They call it the Insert Version G3 Chuck (NOVA 48202). This version of the chuck has 1 1/2" x 8 TPI threads. NOVA does make an adapter for the Insert G3 Chuck (NOVA ISNS 71029). Rocker carries an adapter like this (Nova Insert/Adapter, 5/8" Plain Bore, Rockler Item # 43743), but it will ONLY work with the Insert version of the G3 Chuck, NOT the Reversible G3 Chuck found in the 30th Anniversary Kit.
What adapter is needed for the excelsior lathe that rocker sells?
Ian S on Mar 24, 2016
BEST ANSWER: Item # 48443
What size/thread insert should I order for a Central Machinery lathe??
planet38 on Dec 23, 2016
BEST ANSWER: The Central Machinery 12x36 wood lathe has a 1 inch spindal, 8 RH. From what I see above item # 48443 should work.
do you do a chuck adapter male/female m40x2 to m18x2.5 ?
kevin h on Jun 20, 2016
rockwell beaver 3400 chuck or adapter 3/4"16 tpi LH for outside mount
j g on Feb 24, 2016
BEST ANSWER: I'd like to know if they make a 3/4 16 left hand thread adaptor, too? I don't think they do, in which case I'll have to buy a blank one and drill and tap it. That's if I can get a left hand tap that size.
I have a lathe with 1" x 8 tpi. Do I need an adapter to put the Nova 2 on my lathe?
Robert D on Apr 21, 2018
BEST ANSWER: Robert, yes you do need a insert. It is Rockler stock # 48443.

Tom L
I have a delta 46-250 midi lathe, which adaptor will fit?
Nancy H on Sep 3, 2017
What is the inside TPI of 47239?
Adam R on Sep 20, 2015
I have an old craftsman lathe and the spindle is 3/4 16tpi. My Uncle gave me a nova chuck which is 1 1/4 8 tpi. I need an insert in order to use it. which adapter will work best?
Senta24 on Jan 7, 2017
BEST ANSWER: I just went to Rockler's web site and found the item number for the part you need. Looks like its a #47239 chuck adapter. It has an exterior 1-1/4" thread to fit the chuck, with a 3/4"-16 tip inside to thread onto your spindle. Should work. I use three different insert/adapters personally and have no problem with any of them.
What is the outside thread size of adapted for nova chucks?
Turnitround on Oct 20, 2015
Is Item #47163 the right insert for the Jet 1221 with forward and reverse operation?
Brian on Apr 22, 2020
BEST ANSWER: Here’s the manufacturers specs:
Allows you to ‘adapt’ your Insert Type NOVA Chuck to a 1″x 8TPI RH & LH Lathe. Allows you to keep the same chuck and accessories if you change your lathe – you only need to change the insert/adaptor. The internal thread is 1″x8TPI Dual Threaded RH and LH, and the external thread matches the NOVA insert type chucks, to easily screw into the back of your NOVA Insert Type Chuck. This makes your NOVA insert type chuck ready to attach to your 1″8 threaded lathe spindle. The dual thread is perfect for lathes with both RH and LH 1″x 8TPI Threaded spindles. Precisely machined from 1045 High Tensile Steel.
I have an inexpensive Tool Shop Lathe. I purchased a Nova Supernova 2 Insert Chuck. I measured the lathe spindle - its 11/16" (out to out of threads) and 10 TPI. Any idea what insert adapter I need?
Kelley Tyler on Jul 15, 2017
BEST ANSWER: Boy Kelly, I've never seen that size.before, which certainly does not mean it doesn't exist. If Nova does make it, you may have to contact them directly. I had to do that for the insert I used on my Oliver lathe. But, you may have purchased s lathe that simply is not designed for use with this chuck.
I have a Excelsior Mini Lathe what do I need to put a delta chuck on.?
Robert S on Mar 6, 2017
BEST ANSWER: hello I have a very old delta lathe that they do not sell parts for any more so I looked for a nova insert with the same thread as my headstock and the same thread as the nova chuck I wanted to buy it all worked out great for me if you can not find the right thread type you need I have other sources you can buy them from good luck
Bought a new lathe with 11/4 spindle and need to remove the adapter 1 inch to install new one .How do Ido it?
Don B on May 21, 2016
BEST ANSWER: I would put the adaptor hex portion just inside the top of the jaws of a vise, clamp in the vise, and hand turn the body of the chuck to free it from the adaptor. If you still can't free it, try a strap wrench on the chuck body.
Is 49301 insert adapter, M18x2.5?
Nate F on Jan 14, 2016
BEST ANSWER: I think the answer is no. You are providing metric numbers, this is not a metric sized item.
I looked up Rockler's 49301. It is sized to mount on a 1" shaft that has 12 right hand threads, UNF, per inch.
The exterior thread on all of these adaptors are for Nova chucks which are 1 1/4" x 8 TPI . I don't know if this helps, but hopefully I prevented you from buying the wrong item.
I bought a supernova 2 Chuck bundle to fit an inch and a fourth spindle. My spindle is in fact an inch. Do you have an adapter I can buy wo having to replace the chuck?
Gary A on Feb 20, 2020
BEST ANSWER: Yes see Nova IXNS 1" x 8tpi Insert WITH SETSCREW for Nova Chucks used on reversing lathes
What adapter to I need for a Jet 18X40, JWL1840EVS?
Tomas on Mar 23, 2019
BEST ANSWER: You need to know the thread size of your headstock & buy an adapter to fit that thread size
I need an that goes from 3/4 10 tpi to a 1in 8tpi ,is there anything available ?
Bill S on Dec 25, 2018
BEST ANSWER: Sorry, I can’t answer your question. I don’t know what all the available options are for the Nova. I suggest you contact Nova directly.
I have a nove g3 #48202 chuck and need an adapter to fit the chuck to my shopsmith mark 5 lathe, any idea?
Jpguy on Dec 7, 2018
BEST ANSWER: Order 43743 at Rockker. . It fits in the back of your 48202 insert chuck. Enjoy!
How can I know the right size adaptor for a 12x36 central machinery lathe to fit the Nova jaw chuck?
Steve T on Feb 26, 2018
BEST ANSWER: You need to know what the thread is on your lathe spindle. If you have the manual, it should be listed in the specifications. If not, try looking up your lathe model on the central machinery website. Last resort will be to actually measure the spindle diameter and measure how many threads there are per inch of length. For example 1"-8 meand 1" diameter, and 8 threads/inch
What is item 48443's Teknatool code? I am looking for a 1" 8 TPI with a set screw.
Mike on Oct 10, 2017
BEST ANSWER: Lathe manufacturers have different size and threads per inch (TPI) on the drive side of their lathes. Nova chucks are designed to fit a variety of lathes with the use of an insert that matches the thread width and threads per inch of your particular lathe. The 1" x 8 TPI fit my Rockler lathe. It threads into the chuck and sets with the set screw. Once installed It remains in the chuck and you never have to remove it unless you get another lathe with a different drive side shaft.
How many TPI has the 5/8" adaptor?
Eduardo F on Aug 29, 2017
BEST ANSWER: This adapter is mainly used in a shopsmith lathe that does not have a thread. It uses a set screw to tighten the chuck to the spindle on the headstock
I am brand new to woodturning and have never used a lathe of any kind. I am purchasing a mini wood lathe from Harbor Freight (10" x 18") and want to turn bowls, cups, jars, etc. After much research, I expect to purchase the Nova G3 scroll chuck. 1. Is this self-centering? I see no mention of that in the description. 2. I note that I must have an adaptor/insert to use it. The Harbor Freight lathe has an MT2 tailstock taper. Which adaptor/insert should I purchase?
Harv48 on Mar 13, 2017
Nova Chuck Inserts/Adapters
Nova Chuck Inserts/Adapters
Nova G3 Insert Chuck
Nova G3 Insert Chuck
BEST ANSWER: 1st, yes it is self centering. 2nd a scroll chuck goes on the headstock, the tail stock is just a tapered opening you basically jam stuff into. The headstock is threaded. So you need the Nova Chuck Adapter that matches the threads on your specific lathe.
I need adapters for my oliver 159 lathes. 1-1/8" x 8tpi spindle. Where can I find those?
Lex R on Feb 10, 2017
BEST ANSWER: It isn't clear whether an insert is available with that thread. Suggest contacting Nova directly
Is there a 1/2" plain bore adapter? My spindle is unthreaded with one flat side. Delta model 277
Dan P on Mar 29, 2016
BEST ANSWER: I could not find any inserts for 1/2" shaft. Suggest you find a machinist that would be willing to make you one.
Oneway m33x3.5 adapter?
DaveS on Jun 10, 2020
BEST ANSWER: We stock Oneway adapters, but not for metric thread sizes.
Will the insert chuck and G3 chuck fit in my en mini lathe?
Steve H on Feb 27, 2020
BEST ANSWER: Unfortunately I don’t know.