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Oneway Stronghold Chuck

Choose a separate taper-lock adapter from the related products below.
Item #
94% of 100

With a massive 4-1/2" diameter body, the Stronghold chuck is perfect for heavy turnings that require maximum stability and gripping power. It's key-operated, so one-handed adjustments are simple and fast. A 5/1 ratio ensures solid holding power, while the patented over-extension prevention system ensures that the base jaws will never come loose during operation. A wide range of accessory jaws are available to cover all your turning requirements. The #3 Jaws have the mass and size necessary for large bowls and vases. The profiled jaws provide maximum gripping power with minimal damage to the piece. Spigot Jaws are machined long and deep for a better grip on smaller parts. Both outside and inside surfaces of the jaws are serrated to grip the work piece. The Jumbo and Mega-Jumbo Jaws are solid machined aluminum plates. Their unique combination of slots and tapped holes accept rubber grippers for holding an infinite number of round, oval or square shapes. Choose a separate taper-lock adapter from the related products below.

The Stronghold chuck is the largest chuck in the Oneway family, designed for lathes with a 16" swing or greater. It weighs approximately 8 lbs (fully assembled with the No. 2 Jaws). It is considerably heavier than the Talon Chuck (3.5 lbs) or Oneway Chuck (4.5 lbs) which makes it perfect for large turnings.

What makes the stronghold a superior chuck?
  • Precision machined body.
  • Carbon steel base jaws.
  • Precision grinding on the sides provides for the exact clearances required for wood turning chucks.
  • Base jaws are case hardened which makes them longer lasting, stronger, and non-seizing.
  • Scroll is precision machined and case hardened. The bore is honed to exact tolerances after heat treating.
  • Scroll is manganese phosphate plated which acts as an anti-seize compound. Less lubrication is required for smooth running action.
  • Electroless nickel plating provides a hard wearing surface for base jaws and scroll while providing excellent corrosion resistance.

Add these quality materials and precision manufacturing to features such as:

  • 4-Jaw scroll chuck
  • Profiled top jaws
  • Patented safety feature allowing maximum travel
  • Key operation allowing one handed tightening and solid holding power
  • Superior taperlock adaptor
  • And its one-of-a-kind woodworm screw
  • Equals an absolutely superior chuck!
Notice: If your lathe has less than a 16" swing, the Oneway Talon Chuck (#20761, sold separately) is recommended. Stronghold Chuck jaws are NOT compatible with either the original Oneway Chuck or the Talon Chuck.
(1) Oneway Stronghold Chuck
More Information
Brand Oneway
Manufacturer Part Number 2137
Weight 7.3500
Tech Spec

Capacities of the Stronghold chuck with standard #2 Jaws (included):

  • External (compression): Min - 1-3/4" Max - 3-1/4"
  • Internal (expansion): Min - 2-3/8" Max - 4"

Capacities of the Stronghold chuck with Spigot Jaws #38441:

  • External (compression): Min - 3/8" Max - 2"
  • Internal (expansion): Min - 1-1/8" Max - 2-5/8"

Capacities of the Stronghold chuck with #3 Jaws #37815:

  • External (compression): Min - 3-7/8" Max - 5-1/4"
  • Internal (expansion): Min - 4-1/2" Max - 6"

Capacities of the Stronghold chuck with Jumbo Jaws #31246:

  • External (compression): Min - 2-3/4" Max - 11"
  • Internal (expansion): Min - 4-3/4" Max - 12"

Capacities of the Stronghold chuck with Mega-Jumbo Jaws #31662:

  • External (compression): Min - 1-3/4" Max - 14"
  • Internal (expansion): Min - 4-3/4" Max - 15"

4.7 / 5.0
13 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
works awesome very good quality will buy another one for other jaw setup
January 8, 2020
1 month ago
Woodworking Experience:
This is the third one of these I purchased. I have more than one lathe so I need more than one chuck. This one was for my new Laguna 18/36 lathe. I never take it off the lathe. By using a screw chuck and a spur center designed for the chuck I can do both between center and "faceplate" turning without removing the chuck. I make and sell over 500 items while working a regular job and this chuck makes the required productivity possible.
November 11, 2019
3 months ago
Woodworking Experience:
best heavy duty chuck
Oneway offer one of the best larger chucks available. Works great for large turnings.
July 16, 2019
6 months ago
Woodworking Experience:
Well made and solid.
I needed a chuck that larger than me G3. The Stronghold definitely fills the bill.
April 21, 2019
9 months ago
Woodworking Experience:
Well made chuck
This chuck has improved my lathe by 50% , greatly impressed . Maybe I should look at there wood lathes
January 11, 2019
1 year ago
Woodworking Experience:
Its a good chuck
October 1, 2016
over 3 years ago
Woodworking Experience:
Stronghold Chuck
I have used this chuck for at least 20 years. I bought another so I wouldn't have to switch chucks. I leave medium jaws one one and the Jumbo Jaws on the other.
Great chuck!
November 20, 2015
over 5 years ago
Woodworking Experience:
I have two of the Stronghold...
I have two of the Stronghold chucks. They are great chucks for holding large pieces of wood. I like to have one with the mega jumbo jaws attached so I can finish the bottom of bowls with out changing the jaws. When I work with liquid inlace I like to leave the piece attached to the chuck so it can dry for 12 hours then re-attach the chuck to the lathe and smooth out the inlace. So with two of the stronghold chucks I can keep turning while the inlace dries. I use these chucks for turning small items to 20 inch bowls and platters. Smooth operating and accurate.
April 20, 2009
A very well engineered solid product....
A very well engineered solid product. Really holds well. Replacing jaws very easy. Vastly superior to the midi chuck it replaced.
November 8, 2008
I have truly enjoyed this chuck....
I have truly enjoyed this chuck. It is an extremely high quality product, and I have been impressed with the precision in which it holds the wood I am turning. The parts all turns smooth, and the one-handed tightening is very useful.
April 29, 2008
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 10 answers
Why did you choose this?
Rockler Store
great reviews
van O on Dec 12, 2019
Bowls, Big Bowls
Steven M on May 21, 2019
great reviews
van O on Dec 12, 2019
Recommended by a master turner
Jim W on Nov 30, 2019
Bowls, Big Bowls
Steven M on May 21, 2019
Suggested by friend
Keith S on Feb 26, 2019
Recommended by friend.
Dianne Y J on Jul 10, 2018
Great reviews and I'm going to be turning larger items in the future.
M C on Mar 18, 2016
Extremely positive reviews on numerous different sites
Robert S on Sep 27, 2015
Heavy Duty!
Chuck on Jun 4, 2015
Recommended by a master turner
Jim W on Nov 30, 2019
Suggested by friend
Keith S on Feb 26, 2019
Does this chuck come with jaws? Or just the body?
Tpj W on Aug 8, 2019
BEST ANSWER: Yes, the chuck comes with a medium set of jaws but they are ribbed on the inside which can leave troublesome marks on your tenon. You should probably buy an additional set of dovetail jaws of 2 different sizes if possible. This is a weakness with the stronghold chuck. It should come without jaws and then let the new owner choose what's best for them.
I know the chuck has an adapter that fits a Shopsmith but are all Shopsmiths spindles the same and how can I determine the part # number I would need?
Lynn D on Nov 13, 2018
BEST ANSWER: Measure the width of the spindle and count the threads that’s how u will know what adapter will fit
How do you replace jaws, in what order do you replace them?
Frederick G on Sep 12, 2015
BEST ANSWER: Just remove the two screws. You may have to give them a tap after you take the screws out cause they fit so good. I just use the plastic handle of the blue tool that came with chuck the same one you used to remove screws. There is no real order just make sure you put the jaw with the pin on the chuck body were there is a slot for it to fit in. I think the one with the pin comes mounted on the number 4 spot but you can put it any where there is a slot for it. I believe the numbered parts that you mount the jaws on have to go back in the same spot hence the numbers like if you ever had to take the hole chuck apart to clean it or something. You really don't need to worry about the jaws just the one with the pin.
Is this a reversible chuck?
edward l on May 25, 2018
BEST ANSWER: Yes there are 2 set screws to prevent the chuck from unscrewing when in reverse