• Chuck Adapter, 1-1/2"-8 Thread 4" Diameter, 3 Holes
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Chuck Adapter, 1-1/2"-8 Thread 4" Diameter, 3 Holes

Chuck Adapter, 1-1/2"-8 Thread 4" Diameter, 3 Holes

1918

$39.95 USD
$39.95 USD
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Key Features

  • Cast iron lathe chuck backplate adapter fits lathes with 1-1/2"-8 spindle nose thread
  • Adapter is 4" (100 mm) in diameter and has three chuck mounting holes for a 3-jaw chuck
  • For 4" 3-jaw chucks
  • Includes instructions for final turning of the registration diameter to ensure concentricity

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Product Information

Description

This adapter is for a 4" 3-Jaw chuck such as LittleMachineShop.com PN 1698.

NOTE: PN 1792 is the same adapter just without the 3 holes pre-drilled.

*NOTE* These adapters require machining on the lathe on which they will be used.

Instructions are included for final turning of the registration diameter on your lathe to ensure perfect concentricity.

Chris's Tips

Too many adapters?

See our chart that correlates lathe spindle threads to lathe chuck adapters 

Here is a chart that provides dimensions of threaded lathe chuck adapters.

These adapters must be machined on your lathe to fit the chuck so that it is concentric on the lathe. In most cases you have to drill the chuck mounting holes also.


WOODWORKERS: Our threaded adapters are not suitable for use on wood turning lathes. Please do not purchase them for this application. These adapters require machining on the lathe on which they will be used, and this is impossible on a wood lathe.

Specifications

Nominal Size: 4"

Outside Diameter: Ø 3.937",100 mm

Thread: 1.5"-8

Bolt Holes: 3

Bolt Size: M8

Bolt Circle: Ø 3.307", 84 mm

Hub Diameter: Ø 2.205", 56 mm

Hub Length: Ø 0.551", 14 mm

Flange Thickness: Ø 0.630", 16 mm

Registration Boss: Ø 0.118", 3 mm

Registration Diameter: Ø 2.835", 72 mm

Product Instructions

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