Boring Rings for Machinable Lathe Chuck 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.
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 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 Grip Style | OD | ID | Ht. | Dia. | Ht. | Max. Speed, rpm | Material | Each | |
Standard | ||||||||||
| 6" | Outside | 6.6" | 3.2" | 0.47" | 0.65" | 0.354" | 900 | Alloy Steel | 00000000 | 0000000 |
| 8" | Outside | 8.6" | 4 1/2" | 0.47" | 0.728" | 0.354" | 900 | Alloy Steel | 00000000 | 000000 |
| 10" | Outside | 10.2" | 5.9" | 0.47" | 0.728" | 0.354" | 900 | Alloy Steel | 00000000 | 000000 |
| 12" | Outside | 12.4" | 7.4" | 0.59" | 0.886" | 0.354" | 900 | Alloy Steel | 00000000 | 000000 |
| 15" | Outside | 15" | 9.1" | 0.79" | 1.22" | 0.63" | 900 | Alloy Steel | 00000000 | 000000 |
Adjustable | ||||||||||
| 5"-8" | Inside, Outside | 6.7" | 3.9" | 1.02" | 0.512" | 0.276" | 800 | Alloy Steel | 00000000 | 000000 |
| 6"-10" | Inside, Outside | 7.9" | 4.9" | 1.02" | 0.642" | 0.315" | 700 | Alloy Steel | 00000000 | 000000 |
| 8"-12" | Inside, Outside | 9.8" | 6.3" | 1.22" | 0.72" | 0.315" | 600 | Alloy Steel | 00000000 | 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 | Each | |
| 3" | 3 1/2" | Hardened Steel | 0000000 | 0000000 |
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 | Lg. | Thread Size | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | OD | ID | Head | Shaft | O'all | Center Through-Hole Dia. | Internal | External | Material | Includes | Each | |
| 3" | 5/64"-2 15/32" | 63/64"-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 | 00000000 | 0000000 |
| 4" | 5/64"-3 5/32" | 1 3/16"-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 | 00000000 | 000000 |