Machinable Lathe Chuck Jaws
Machine these jaws to fit the curves and edges of your unique workpiece for a tighter hold and more stability than standard hardened jaws. They have industry standard 1.5 mm x 60° serrations, which mount to most CNC lathe chucks from Kitagawa, LMC, Samchully, Seoam, and Auto Strong. Attach to your chuck with jaw nuts (not included). For the tightest fit to your workpiece, use boring rings to hold your jaws in place while machining.
Pointed jaws provide three points of contact on the workpiece. They are the best choice for most custom workholding.
Full-grip jaws surround the workpiece for maximum grip from every angle, ensuring an exact fit on thin or intricate parts.
Aluminum jaws are lighter in weight than steel and can be turned at higher speeds with less wear on your machine.
Steel jaws are more durable than aluminum. For repeated use, harden them after machining.
For technical drawings and 3-D models, click on a part number.
| For Lathe Chuck Dia. | Ht. | Lg. | Wd. | Slot Wd. | No. of Pieces | Serration Size | For Screw Size  | Mounting Hole Ctr.-to-Ctr. | Weight, lbs. | Each | |
6061 Aluminum | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 6" | 1 1/2" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 1.2 | 0000000 | 000000 |
| 6" | 2" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 1.8 | 00000000 | 00000 |
| 6" | 3" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 2.4 | 00000000 | 00000 |
| 8" | 2" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 3 | 00000000 | 00000 |
| 8" | 3" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 4.2 | 00000000 | 00000 |
| 8" | 4" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 5.7 | 00000000 | 000000 |
| 10" | 2" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 3.3 | 00000000 | 00000 |
| 10" | 3" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 4.8 | 00000000 | 00000 |
| 10" | 4" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 6.6 | 00000000 | 000000 |
| 12" | 2" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 5.4 | 00000000 | 000000 |
| 12" | 3" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 7.8 | 0000000 | 000000 |
| 12" | 4" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 10.5 | 00000000 | 000000 |
| 15" | 3" | 6 1/2" | 2 1/2" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 11.4 | 00000000 | 000000 |
| 15" | 4" | 6 1/2" | 2 1/2" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 15.3 | 00000000 | 000000 |
1018 Carbon Steel | |||||||||||
| 6" | 1 1/2" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 3.5 | 00000000 | 00000 |
| 6" | 2" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 4.7 | 00000000 | 00000 |
| 6" | 3" | 3" | 1 1/4" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 7.1 | 00000000 | 000000 |
| 8" | 2" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 8.1 | 00000000 | 00000 |
| 8" | 3" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 12.3 | 00000000 | 000000 |
| 8" | 4" | 4" | 1 1/2" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 16.2 | 00000000 | 000000 |
| 10" | 2" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 9.1 | 0000000 | 00000 |
| 10" | 3" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 13.8 | 00000000 | 000000 |
| 10" | 4" | 4 1/2" | 1 1/2" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 18.5 | 00000000 | 000000 |
| 12" | 2" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 15 | 00000000 | 000000 |
| 12" | 3" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 22.5 | 00000000 | 000000 |
| 12" | 4" | 5 1/2" | 2" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 30.3 | 00000000 | 000000 |
| 15" | 3" | 6 1/2" | 2 1/2" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 33.1 | 00000000 | 000000 |
| 15" | 4" | 6 1/2" | 2 1/2" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 45 | 00000000 | 000000 |
6061 Aluminum | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Lathe Chuck Dia. | Ht. | Dia. | Slot Wd. | No. of Pieces | Serration Size | For Screw Size | Mounting Hole Ctr.-to-Ctr. | Weight, lbs. | Each | |
| 6" | 2" | 6" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 5.7 | 00000000 | 000000 |
| 6" | 3" | 6" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 8.1 | 00000000 | 000000 |
| 6" | 4" | 6" | 0.472" | 3 | 1.5 mm × 60° | M10 | 0.787" | 10.8 | 0000000 | 000000 |
| 8" | 2" | 8" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 10.2 | 00000000 | 000000 |
| 8" | 3" | 8" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 14.7 | 00000000 | 000000 |
| 8" | 4" | 8" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 19.8 | 00000000 | 000000 |
| 10" | 2" | 10" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 16.2 | 00000000 | 000000 |
| 10" | 3" | 10" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 24 | 00000000 | 000000 |
| 10" | 4" | 10" | 0.63" | 3 | 1.5 mm × 60° | M12 | 1.181" | 31.5 | 00000000 | 000000 |
| 12" | 2" | 12" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 23.4 | 00000000 | 000000 |
| 12" | 3" | 12" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 34.2 | 00000000 | 000000 |
| 12" | 4" | 12" | 0.827" | 3 | 1.5 mm × 60° | M16 | 1.181" | 45.3 | 00000000 | 000000 |
| 15" | 3" | 15" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 53.7 | 0000000 | 000000 |
| 15" | 4" | 15" | 0.866" | 3 | 1.5 mm × 60° | M20 | 1.693" | 70.8 | 00000000 | 000000 |
Hardened Lathe Chuck Jaws
Made from hardened steel, these jaws have a long service life even when performing heavy machining such as roughing cuts. Jaws are reversible and have teeth to grip a workpiece from its outside or inside. Fits most CNC lathe chucks made by Kitagawa, LMC, Samchully, Seoam, and Auto Strong. To ensure compatibility, match your chuck's diameter, slot width, serration type, and mounting-hole center-to-center distance. Attach to your chuck with jaw nuts (not included). Each set includes three jaws.
For technical drawings and 3-D models, click on a part number.
Step Ht. | Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Lathe Chuck Dia. | Ht. | Lg. | Wd. | Slot Wd. | (A) | (B) | No. of Pieces | Serration Size | For Screw Size | Mounting Hole Ctr.-to-Ctr. | Weight, lbs. | Each | |
Reversible Jaws | |||||||||||||
| 6" | 2" | 2.846" | 1 1/4" | 0.472" | 1" | 1 1/2" | 3 | 1.5 mm × 60° | M10 | 0.787" | 4.5 | 0000000 | 0000000 |
| 8" | 2 1/2" | 3.802" | 1 1/2" | 0.551" | 1 1/4" | 1 7/8" | 3 | 1.5 mm × 60° | M12 | 1" | 6.1 | 0000000 | 000000 |
| 10" | 2 1/2" | 4.352" | 1 3/4" | 0.63" | 1 1/4" | 1.937" | 3 | 1.5 mm × 60° | M12 | 1.187" | 9.1 | 0000000 | 000000 |
| 12" | 2 3/4" | 4.003" | 2" | 0.827" | 1 1/4" | 2" | 3 | 1.5 mm × 60° | M16 | 1.181" | 8.3 | 0000000 | 00000000 |
| 15" | 2.94" | 5.712" | 2 1/2" | 0.866" | 1 5/8" | 2.312" | 3 | 1.5 mm × 60° | M20 | 1.693" | 18.8 | 0000000 | 00000000 |
Lathe Chuck Stops
 Fixed Lathe Chuck Stop Shown Installed |  Fixed |  Adjustable |
 Adjustable With Hardened Steel Parallels |
Consistently position workpieces in a three-jaw lathe chuck. These stops enable short workpieces to extend beyond the chuck's jaws, providing additional clearance. A magnetic back makes them easy to mount and remove from your chuck face.
Fixed chuck stops are a simple, consistent way to position your piece.
Adjustable chuck stops can be used with parallels or your own custom supports to position workpieces at the exact depth you need. Those that include hardened steel parallels come ready to set at various depths.
| No. of Pieces | Thicknesses Included | For Max. Chuck Jaw Thick. | Parallel Tolerance | Mount Type | No. of Mounting Magnets | Includes | Material | Each | |
Fixed | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3 | 15mm, 20mm, 25mm | 2 1/8" | -0.0004" to 0.0004" | Magnetic Back | 3 | __ | Aluminum | 0000000 | 0000000 |
| 5 | 15mm, 20mm, 25mm, 30mm, 35mm | 2 1/8" | -0.0004" to 0.0004" | Magnetic Back | 3 | __ | Aluminum | 00000000 | 000000 |
Adjustable | |||||||||
| 6 | 7/16" | __ | -0.0002" to 0.0002" | Magnetic Back | 3 | Five plastic centering rings (1 3/8" to 4" diameter) | Metal | 00000000 | 00000 |
| 17 | 7/16" | __ | -0.0002" to 0.0002" | Magnetic Back | 3 | Six plastic centering rings (1 3/8" to 4" diameter), Ten sets of hardened steel parallels (1/2" to 1 5/18" height) in a plastic case | Metal | 00000000 | 000000 |
Three-Jaw Lathe Chucks
Mount to a lathe's spindle to hold round workpieces. Also known as scroll chucks, these 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.
Chuck with solid jaws comes with one set of outside jaws and one set of inside jaws.
Chucks with reversible jaws come with one set of jaws that can be installed for either an inside or outside grip.
A mounting plate (sold separately) is required to mount the chuck to a lathe. Select a mounting plate that matches the diameter of the lathe chuck and your lathe’s spindle type and spindle OD.
For technical drawings and 3-D models, click on a part number.
Lathe Chucks | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Workpiece | Replacement Reversible Jaw Set | |||||||||||
| Dia. | OD | ID | Center Through-Hole Dia. | TIR (Total Indicated Runout) Accuracy | Overall Lg. | Max. Speed, rpm | Material | Weight, lbs. | Each | Each | ||
| 6" | 0.31"-5.51" | 2.17"-5.91" | 1.78" | 0.0005" | 2.76" | 4,600 | Steel | 23 | 0000000 | 000000000 | 0000000 | 0000000 |
| 8" | 0.39"-7.87" | 2.17"-7.09" | 2.37" | 0.0005" | 3.15" | 4,000 | Steel | 37 | 0000000 | 00000000 | 0000000 | 000000 |
For Spindle | For Spindle Nose | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Type | OD | Size | Thread Size | Type | Dia. | Lg. | Center Through-Hole Dia. | Material | Each | |
For 5" Lathe Chuck Dia. | ||||||||||
| A1, A2 | 2 1/8" | 3 | __ | A-3 | 3.725" | 0.765" | 1.28" | Steel | 0000000 | 0000000 |
| A1, A2 | 4 1/4" | 4 | __ | A-4 | 2 1/2" | 0.437" | 1.28" | Steel | 0000000 | 000000 |
| D1 Camlock | 3 5/8" | 3 | __ | D1-3 | 2 1/8" | 0.437" | 1.28" | Steel | 0000000 | 000000 |
| D1 Camlock | 4 1/4" | 4 | __ | D1-4 | 2 1/2" | 0.437" | 1.28" | Steel | 0000000 | 000000 |
| Hardinge | 3.126" | __ | __ | 4-Degree | 2.316" | 1.472" | 1.32" | Steel | 0000000 | 000000 |
| Threaded | 5.11" | __ | 2 3/16"-10 | __ | 2 3/16" | 1.38" | 2.19" | Steel | 0000000 | 000000 |
For 6" Lathe Chuck Dia. | ||||||||||
| A1, A2 | 5 1/4" | 5 | __ | A-5 | 3.251" | 0.563" | 1.8" | Steel | 0000000 | 000000 |
| A1, A2 | 6 1/2" | 6 | __ | A-6 | 4.188" | 5/8" | 1.8" | Steel | 0000000 | 000000 |
| A1, A2 | 8 1/4" | 8 | __ | A-8 | 5.501" | 0.688" | 1.8" | Steel | 0000000 | 00000000 |
| D1 Camlock | 4 1/4" | 4 | __ | D1-4 | 2 1/2" | 0.437" | 1.8" | Steel | 0000000 | 000000 |
| D1 Camlock | 7 1/8" | 6 | __ | D1-6 | 4.188" | 5/8" | 1.8" | Steel | 0000000 | 000000 |
| Hardinge | 3.126" | __ | __ | 4-Degree | 2.316" | 1.472" | 1.32" | Steel | 0000000 | 000000 |
| Threaded | 6 1/2" | __ | 2 3/16"-10 | __ | 2 3/16" | 1.63" | 2.19" | Steel | 0000000 | 000000 |
For 8" Lathe Chuck Dia. | ||||||||||
| A1, A2 | 5 1/4" | 5 | __ | A-5 | 3.251" | 0.563" | 2.39" | Steel | 0000000 | 000000 |
| A1, A2 | 6 1/2" | 6 | __ | A-6 | 4.188" | 5/8" | 2.39" | Steel | 0000000 | 000000 |
| A1, A2 | 8 1/4" | 8 | __ | A-8 | 5.501" | 0.688" | 2.39" | Steel | 0000000 | 000000 |
| D1 Camlock | 4 1/4" | 4 | __ | D1-4 | 2 1/2" | 0.437" | 2.4" | Steel | 0000000 | 000000 |
| D1 Camlock | 7 1/8" | 6 | __ | D1-6 | 4.188" | 5/8" | 2.39" | Steel | 0000000 | 000000 |
Lathe Spindle Stops
Position workpieces in the same spot every time to quicken setup, improve repeatability, and cut down on scrap. These stops create a repeatable position within your lathe spindle for clamping parts loaded through a chuck or collet. They fit a range of spindle bore diameters—the jaws expand outward for a secure, self-centering fit. To lock these stops in place, expand them with just a few turns of the T-handle wrench. They can be used on both CNC and manual lathes.
| For Spindle Dia. | Overall Lg. | Includes | Material | Each | |
| 1 5/16"-1 11/16" | 31"-34 1/2" | Collet Stop Adapter, Tube Stop Adapter, Long Extension Bar, Short Extension Bar, T-Handle Socket Wrench | Black-Oxide Alloy Steel | 00000000 | 0000000 |
| 1 3/4"-2 7/16" | 37 1/4"-43 3/4" | Collet Stop Adapter, Tube Stop Adapter, Long Extension Bar, Short Extension Bar, T-Handle Socket Wrench | Black-Oxide Alloy Steel | 00000000 | 000000 |
| 2 1/2"-3 1/2" | 40"-46 1/2" | Collet Stop Adapter, Tube Stop Adapter, Long Extension Bar, Short Extension Bar, T-Handle Socket Wrench | Black-Oxide Alloy Steel | 00000000 | 000000 |