Stronghold Chuck

This heavy duty chuck is designed for large lathes (16" swing or greater) to provide maximum gripping power!


The Stronghold Chuck is operated by a key. Key operation provides two major advantages:

  • One handed operation
  • Solid holding power
  • 5 to 1 ratio assures powerful clamping

The body diameter of this chuck is 4½" (the largest currently available in our chuck family).

Note: If your lathe is less than a 16" swing, we recommend our Talon Chuck.

The following features are standard on our chucks:

  • quality materials
  • nickel plated body
  • hardened base jaws
  • manganese phosphate coated scroll

Key Features Include:

  • Single-Hand Key Operation
  • Our Patented Over-Extension Safety System (see below for more details)
  • 4-Jaw Scroll Chuck
  • Rugged Base Jaw Design


This wouldn't classify as a ONEWAY chuck if it didn't include our patented over extension prevention system for added safety. This prevents the base jaws from coming loose during operation.

Accessory Jaws

A wide range of accessory jaws are available for this chuck to cover all your turning requirements.

#3 Jaws, #2 Jaws, and Spigot Jaws (left to right)

The following Jaw sets are available for this chuck:


Capacities of the Stronghold chuck with standard #2 Jaws:

  Min Max
External (compression) 1¾" 3¼"
Internal (expansion) 2-3/8" 4"

Want to know what the Capacities are for this Chuck with the optional jaw sets? Click Here


The chuck 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 a very desirable chuck for large size lathe owners who want an exceptionally powerful grip for turning larger pieces.


Click here to view the Stronghold Chuck Instruction Manual in PDF Format.


Stronghold Chuck jaws are NOT compatible with either the original ONEWAY Chuck OR the Talon Chuck.

To find out more about this chuck or other Chucks we manufacture, click here.

Where are they made?

All Oneway Chucks and accessory jaws are manufactured in Stratford, Canada.

We take great pride in the quality of our products and believe in offering a superior product at a reasonable price.

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Part No.
Stronghold Chuck (complete)
Body Only Package
Extra Adaptor

Package Includes

#2 Top Jaws, Taper-Lock Adaptor (packaged separately), Key, 1½" RH Jumbo Screw, 4mm Hex Key

Body Only
Package Includes

Taper-Lock Adaptor (packaged separately), Key, 4mm Hex Key

Body Only Package

Do you have extra jaw sets and are sick and tired of changing them?

Consider purchasing a bare bones "Body Only Package". Accessory jaws can be permanently mounted on these chucks, making changing top jaws a thing of the past.

An extra Adaptor can be purchased for €25.95

When Ordering

Please specify the adaptor thread required for your spindle or the Part No. of the Adaptor required.

Taper-Lock Adaptor

For a list of our standard Taper-Lock Adaptors, click here.


Dealers may sell the Taper-Lock Adaptor separately