What is the minimum exterior size this would hold? I've seen on other listings it was 2-3/4. I'd like to finish the inside of wooden bracelets.

The minimum exterior as shown in the photo at the left is approximately 4-1/2". The through bolts will ultimately contact the 4 jaw chuck if you close it down far enough. It then becomes impossible to tighten the bumpers.Ron

how is it mounted on the lathe,by chuck or screwed on?

The longworth chuck I have (I bought from CraftSupplies via Amazon) mounts to a standard 4 jaw self-centering scrolling chuck such as the Barracuda. The 4 jaw chuck is, in turn, screwed onto the lathe. YouTube has a good video (https://www.youtube.com/watch?v=lEJfrO9CJBU) on the longworth chuck.

What is the smallest bowl it will work with?

The short answer is around 4-1/2" in diameter. I say that because the bolts protrude out the back so depending on you chuck body and the profile of the jaws it could go larger or smaller. I designed it's capacity to take over where your regular scroll chuck stops.Ron Brown, Designer

My lathe is a 12 inch swing. Will this fit or be too big, wasn't sure what actual dimensions this has?.

The 12 inch longworth chuck is smaller than the swing on your lathe so it should work fine.I have a Jet 12 inch lathe and it works swell.

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Longworth Chuck 12"

Product ID: 23228161

Details

Material
PHENOLIC AND
Item Weight
4.5 Pounds
Compatible Devices
Lathe
Included Components
Lathe Chuck
Manufacturer
RMWoodco

📏6.5'' to 12'' capacity

🔧4.5'' to 10'' compression

⚙️12'' diameter

€ 353.64

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Description

🔩 Elevate Your Craft with Precision!

ROBUST DESIGN - Lightweight yet durable at just 4.5 pounds.
USER FRIENDLY - No batteries required, just pure craftsmanship.
VERSATILE CAPACITY - Accommodates a wide range of project sizes from 6.5'' to 12''.
PRECISION CENTERING - Easily center your projects with concentric closure.
STANDARD COMPATIBILITY - Designed for standard-sized lathes with a 12'' swing or larger.

The Longworth Chuck 12'' is a high-quality, versatile tool designed for standard-sized lathes, offering exceptional precision and ease of use. With a capacity range of 6.5'' to 12'' for inside expansion and 4.5'' to 10'' for outside compression, this chuck is perfect for woodturning enthusiasts looking to enhance their projects. Weighing only 4.5 pounds, it combines durability with lightweight convenience, making it an essential addition to any workshop.

Specifications

UPC	661799233286
Part Number	LC12
Item Weight	4.5 pounds
Product Dimensions	12 x 12 x 2 inches
Item model number	LC12
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Number Of Pieces	12
Batteries Included?	No
Batteries Required?	No

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€ 353.64

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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