Products for bench top machinists | LittleMachineShop.com

Collet Chuck, ER-40, 4" Diameter

Collet Chuck, ER-40, 4" Diameter - Main image
Collet Chuck, ER-40, 4" Diameter - View 2
$62.07 $89.95 In stock

This collet chuck for ER-40 collets mounts on the lathe spindle in place of the lathe chuck or can be used as a fixture on a milling table.
ER-40 collet chucks range in size from 1/8" up to 1" so you can run 1" stock through the headstock of your lathe. (The through hole on the lathe spindle may be smaller.)
The outside diameter of the collet chuck is 100 mm. It has a 72 mm registration diameter and mounts with three M8 bolts on a 84 mm bolt circle. The concentricity of this chuck is <0.0002" (0.005 mm).

Includes a basic collet wrench.

*Collet must be assembled into a collet chuck nut before inserting into the collet chuck.

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Customer Reviews (4.8 / 5 · 5 reviews)

Owen B. ★★★★★

Mounting this on my milling table was easy, and the 4-inch diameter gives a solid, stable grip on my 1/2" stock. It holds the workpiece securely without any wiggle during cuts.

Nicholas R. ★★★★★

I’ve been using this ER-40 collet chuck as a fixture on my milling table, and the 4" diameter gives it a nice solid mounting platform. The 1/8" to 1" collet range covers all the tool shanks I normally use, and the threads were clean enough that it spun on smoothly without any wobble.

Sofia E. ★★★★★

Swapped out my old chuck for this ER-40 unit and the 4" diameter gives me plenty of grip range up to 1" stock, which covers most of my jobs. The mount was straightforward, and it runs true enough that I haven’t needed to re-indicate it since.