Machinable Lathe Chuck Top 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. For the tightest fit to your workpiece, use boring rings to hold your jaws in place while machining.
Full-grip jaws surround the workpiece for maximum grip from every angle, ensuring an exact fit on thin or intricate parts. This increased contact area reduces your risk of deforming parts with thin walls. They’re also known as pie jaws.
Serrated jaws work with most power lathe chucks from Kitagawa, LMC, Samchully, Toolmex, Bison, Seoam, and Auto Strong. Attach to your chuck with jaw nuts (not included). Tongue and groove jaws work with most manual lathe chucks from Bison, Toolmex, Buck, Samchully, Rohm, and Huron.
Aluminum jaws are lighter in weight than steel jaws, so they can be turned at higher speeds with less wear on your machine.
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 | |
Serrated | ||||||||||
| 8" | 2" | 8" | 0.551" | 3 | 1.5 mm × 60° | M12 | 0.984" | 10.2 | 00000000 | 0000000 |
| 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 |
Tongue and Groove | ||||||||||
| 8" | 2" | 8" | 0.313" | 3 | __ | M10 | 1.75" | 10.2 | 00000000 | 000000 |
| 8" | 4" | 8" | 0.313" | 3 | __ | M10 | 1.75" | 19.8 | 00000000 | 000000 |
Lathe Chucks
Mount these chucks to a lathe's spindle to hold round workpieces. Also known as scroll chucks, they are self centering—all jaws move in unison, centering the workpiece as they close. Made of forged steel, these chucks are strong and wear resistant, so they maintain their shape even with continuous use. They’re often used for precision machining. You can run them at higher speeds than cast iron chucks, and they’ll last longer. Use the included lathe chuck wrench to open and close the jaws.
Chucks with fixed jaws come with one set of outside jaws and one set of inside jaws. These jaws are one-piece and keyed, so they’re best for rigid and permanent setups where you don’t need to change your jaw style. They’re commonly used in dedicated turning operations or roughing applications.
Chucks with reversible jaws come with one set of jaws that can be installed for either an inside or outside grip. These jaws are two-piece and tongue-and-groove, so they’re great for when you need to regularly switch top jaws or use soft jaws for custom clamping. This setup offers the best mix of flexibility and repeatable accuracy. Those with six jaws hold your workpiece tighter than chucks with three jaws. They also distribute the clamping force more evenly, so you’re less likely to deform parts with thin walls.
Use high-pressure grease to improve grip and prolong the life of your chuck.
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, your lathe’s spindle type, and the spindle OD.
Lathe Chucks | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Workpiece | Replacement Reversible Jaw Set | High-Pressure Grease (13.7 fl. oz.) | |||||||||||
| Dia. | OD | ID | Center Through-Hole Dia. | TIR (Total Indicated Runout) Accuracy | Max. Speed, rpm | Material | Includes | Each | Each | Each | |||
3 Jaws | |||||||||||||
| 8" | 0.15"-7.87" | 1.97"-7.48" | 2.16" | 0.0008" | 4,000 | Steel | One Set of Reversible Top Jaws, One Set of Jaw Mounts, Self-Ejecting Lathe Chuck Wrench, Hex Key, Mounting Bolts, Adjustment Screws | 0000000 | 000000000 | 0000000 | 0000000 | 0000000 | 000000 |
6 Jaws | |||||||||||||
| 8" | 0.31"-7.78" | 2.05"-7.48" | 2.16" | 0.0016" | 4,000 | Steel | One Set of Reversible Top Jaws, One Set of Jaw Mounts, Self-Ejecting Lathe Chuck Wrench, Hex Key, Mounting Bolts, Adjustment Screws | 0000000 | 00000000 | 0000000 | 000000 | 0000000 | 00000 |
Powered Lathe Chucks
Precise and powerful clamping for high speed, heavy duty CNC turning. These chucks connect to your CNC lathe’s hydraulic system to open and close the jaws—no more cranking with a chuck jaw wrench. To mount the chucks to your lathe, machine the included blank draw nut to match the thread of your drawtube. You can use these as drop-in replacements for major machine brands such as Okuma, Mazak, Haas, Hyundai WIA, and Doosan.
These chucks are self-centering, so all the jaws move in unison to center the workpiece as they close. They come with a set of machinable jaws that you can bore to fit the curves and edges of your unique workpiece for a tighter hold and more stability than standard hardened jaws. For additional sizes and materials, see our full offering of machinable jaws.
Jaw-boring chucks reduce the time it takes to machine jaws. Instead of a separate boring ring or machined slugs that you have to position and reposition, they have a built-in adjustment ring. All you need is an L-key to fine-tune alignment once before machining. The ring moves in increments as small as 0.004”, so the jaws are machined for a tight fit to your workpiece.
Use high-pressure grease to improve grip and prolong the life of your chuck.
A mounting plate (sold separately) is required to mount the chuck to a lathe. Select a mounting plate that matches the diameter of your lathe’s chuck and spindle OD.
Lathe Chucks | High-Pressure Grease (13.7 fl. oz.) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | For Workpiece OD | Center Through-Hole Dia. | TIR (Total Indicated Runout) Accuracy | Max. Speed, rpm | Number of Jaws | Serration Size | Material | Includes | Each | Each | ||
Two-Piece Serrated Jaw | ||||||||||||
| 8" | 0.43"-8.26" | 2.04" | 0.0008" | 5,000 | 3 | 1.5 mm × 60° | Steel | One Set of Master Jaws with Machinable Top Jaws, Self-Ejecting Lathe Chuck Wrench, Machinable Draw Nut, Hex Key, Mounting Bolts | 0000000 | 000000000 | 0000000 | 000000 |
| 8" | 0.43"-8.26" | 2.59" | 0.0008" | 5,000 | 3 | 1.5 mm × 60° | Steel | One Set of Master Jaws with Machinable Top Jaws, Self-Ejecting Lathe Chuck Wrench, Machinable Draw Nut, Hex Key, Mounting Bolts | 0000000 | 00000000 | 0000000 | 00000 |
Lathe Chucks | High-Pressure Grease (13.7 fl. oz.) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | For Workpiece OD | Center Through-Hole Dia. | TIR (Total Indicated Runout) Accuracy | Max. Speed, rpm | Number of Jaws | Serration Size | Material | Includes | Each | Each | ||
Two-Piece Serrated Jaw | ||||||||||||
| 8" | 0.52"-8.25" | 2.04" | 0.0002" | 5,000 | 3 | 1.5 mm × 60° | Steel | One Set of Master Jaws with Machinable Top Jaws, Self-Ejecting Lathe Chuck Wrench, Machinable Draw Nut, Hex Key, Mounting Bolts, T-Nuts | 0000000 | 000000000 | 0000000 | 000000 |
| 8" | 0.91"-8.25" | 2.59" | 0.0002" | 5,000 | 3 | 1.5 mm × 60° | Steel | One Set of Master Jaws with Machinable Top Jaws, Self-Ejecting Lathe Chuck Wrench, Machinable Draw Nut, Hex Key, Mounting Bolts, T-Nuts | 0000000 | 00000000 | 0000000 | 00000 |
