Lathe Chuck Adapters | McMaster-Carr

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11 Products

5C Collet to Lathe Chuck Adapters

No need to break down a collet set up when a workpiece doesn't fit a 5C collet. Install one of these lathe chuck adapters in your 5C collet chuck or holder and its three jaws will securely grasp the workpiece. These chuck adapters are self centering—all three jaws move in unison, centering the workpiece as they close. Use the included lathe chuck wrench to open and close the jaws.

	For Workpiece		Length				Thread Size
Dia.	OD	ID	Head	Shaft	O'all	Ctr. Through-Hole Dia.	Internal	External	Material	Includes		Each
3"	5/64" to 2 15/32"	63/64" to 2 3/4"	2 41/64"	3 13/32"	6 3/64"	5/8"	7/8"-20	1.238"-20	Hardened Steel	One Set of Solid Outside-Grip Jaws, One Set of Solid Inside-Grip Jaws, Lathe Chuck Wrench	33135A21	0000000
4"	5/64" to 3 5/32"	1 3/16" to 3 35/64"	2 27/32"	3 13/32"	6 1/4"	7/8"	7/8"-20	1.238"-20	Hardened Steel	One Set of Solid Outside-Grip Jaws, One Set of Solid Inside-Grip Jaws, Lathe Chuck Wrench	33135A22	000000

Lathe Chuck to 5C Collet Adapters

When a job calls for a 5C collet, save time by using an adapter instead of removing your lathe chuck. The adapter fits most lathe chucks. Install a 5C collet into the adapter and secure it by turning the lock with the included hex key.

Dia.	Lg.	Material	Includes		Each
3"	3 1/2"	Hardened Steel	Hex Key	3302A21	0000000

Lathe Chuck Jaw Boring Rings

Standard Ring for Machining Outside-Grip Jaws

Adjustable Ring Installed for Machining Inside-Grip Jaws

Adjustable Ring Installed for Machining Outside-Grip Jaws

Hold machinable lathe chuck jaws in place during machining to make accurate cuts, ensuring the jaws will securely grip your workpiece. These boring rings pin the jaws down, creating the same clamping pressure you’ll use on your workpiece, which keeps the jaws from warping or deforming while they hold your workpiece.

Designed with an open center, these rings leave room for you to machine the center of your jaws. Fit the pins on the rings to the screw holes on your jaws, then clamp the jaws down to hold the ring in place. Once the ring is attached, rotate it to adjust the jaws to the center of their stroke before machining.

Standard Boring Ring—Match standard rings to your lathe chuck’s diameter for machining the center of your jaws. Line them up with your jaws by sliding the pins along their curved tracks.

Adjustable Boring Ring—Adjustable rings fit a range of lathe chuck diameters. The pins are mounted to straight tracks—slide them in and out of the ring to adjust the diameter. They are also reversible, which allows you to machine both the inside and outside of your jaws. When the pin screws are outside the ring, you can machine the center of your jaws. Flip them around to the center of the ring to machine the outside of your jaws.

						Pin
	For Lathe Chuck Dia.	For Jaw Gripping Location	OD	ID	Ht.	Dia.	Ht.	Max. Rotation Speed, rpm	Material		Each
Standard Boring Ring



		6"	Outside	6.6"	3.2"	0.47"	0.65"	0.354"	900	Alloy Steel	6886N113	0000000


		8"	Outside	8.6"	4 1/2"	0.47"	0.728"	0.354"	900	Alloy Steel	6886N114	000000
		10"	Outside	10.2"	5.9"	0.47"	0.728"	0.354"	900	Alloy Steel	6886N115	000000
		12"	Outside	12.4"	7.4"	0.59"	0.886"	0.354"	900	Alloy Steel	6886N116	000000
		15"	Outside	15"	9.1"	0.79"	1.22"	0.63"	900	Alloy Steel	6886N117	000000


		Adjustable Boring Ring



				5" to 8"	Inside, Outside	6.7"	3.9"	1.02"	0.512"	0.276"	800	Alloy Steel	6886N119	000000


				6" to 10"	Inside, Outside	7.9"	4.9"	1.02"	0.642"	0.315"	700	Alloy Steel	6886N121	000000
				8" to 12"	Inside, Outside	9.8"	6.3"	1.22"	0.72"	0.315"	600	Alloy Steel	6886N122	000000