3-Jaw Hollow Hydraulic Power Chuck
A common CNC lathe hydraulic power chuck for round workpieces and batch turning. Confirm through-hole size, drawbar, rotary cylinder, spindle nose and clamping range.
Hydraulic power chucks for CNC lathe workholding, automated clamping and stable production cycles.
Hydraulic Power Chucks
KORRETTO hydraulic power chucks are used with rotary hydraulic cylinders and drawbars to provide controlled clamping and release for CNC lathe workholding. This series includes 3-jaw hollow hydraulic chucks, 3-jaw solid hydraulic chucks, 2-jaw hollow hydraulic chucks, 4-jaw hollow hydraulic chucks, through-hole and solid chuck configurations, rotary hydraulic cylinders, soft jaws and hard jaws. They are suitable for batch turning, bar feeding, automated clamping and applications that require repeatable clamping force and stable cycle timing.
Browse Hydraulic Power Chuck Series
Select a hydraulic power chuck by jaw number, through-hole or closed-center requirement, workpiece shape, spindle nose, drawbar stroke, rotary hydraulic cylinder and required clamping force. Hollow or open-center hydraulic chucks are used when bar stock or tubing must pass through the spindle; solid or closed-center hydraulic chucks are used when through-spindle material feeding is not required.
3-Jaw Solid Hydraulic Power Chuck
A solid-center hydraulic power chuck for short blanks and repeat CNC turning. Check spindle nose, drawbar, solid rotary cylinder, clamping range and speed.
2-Jaw Hollow Hydraulic Power Chuck
A shaped-part hydraulic power chuck used when a standard 3-jaw hydraulic chuck cannot contact the workpiece correctly. Hollow construction supports bar or tube passage when required.
4-Jaw Hollow Hydraulic Power Chuck
A four-point hydraulic power chuck for workpieces that benefit from through-spindle passage and better contact distribution. Confirm workpiece shape, through hole, drawbar, rotary cylinder and cutting load.
Rotary Hydraulic Cylinder
The rotary cylinder drives the chuck through the drawbar. Hollow cylinders support bar passage; solid cylinders are used where through-spindle feeding is not required.
Lathe Soft Jaws & Hard Jaws
Soft jaws are often machined to match the workpiece profile for repeat production. Hard jaws are used when jaw rigidity and durability are more important.
Not sure which hydraulic chuck or cylinder fits your machine?
Send the workpiece drawing, machine model, spindle nose, drawbar thread, drawbar stroke, rotary hydraulic cylinder information and target clamping force. We can help compare 3-jaw, 2-jaw, 4-jaw, through-hole/open-center, solid/closed-center and rotary cylinder options.
Submit Your ProjectTypical Fit / May Need Another Solution: Quick Guide
Typical fit
- CNC lathe production with repeated clamping cycles.
- Automated loading or program-controlled clamping.
- Applications requiring more consistent clamping force than manual tightening.
- Machines already equipped for hydraulic actuation and suitable filtration.
May need another solution
- Prototype or repair work with low cycle pressure: check Manual Chucks.
- Clean-air environments where hydraulic oil is restricted: check Pneumatic Chucks.
- Thin-wall or deformation-sensitive parts: check Collet Chucks, Diaphragm Chucks, Rubber-Flex Collets or 6-Jaw Chucks.
- Special workpieces requiring pull-down, face clamping or pipe-thread clamping: check Application-Specific Power Chucks.
Quick Selection Table
| Requirement | Start with |
|---|---|
| General round parts and batch CNC turning | 3-Jaw Hollow Hydraulic Chuck or 3-Jaw Solid Hydraulic Chuck |
| Bar stock or tube passing through the spindle | Through-Hole / Open-Center Hydraulic Chuck |
| Short blanks without through-spindle feeding | Solid / Closed-Center Hydraulic Chuck |
| Symmetrical shaped parts or custom jaw profiles | 2-Jaw Hollow Hydraulic Chuck |
| Square or four-sided parts requiring four-point clamping | 4-Jaw Hollow Hydraulic Chuck |
| Unknown drawbar force or stroke | Rotary Hydraulic Cylinder and drawbar review |
| Profile-matched production clamping | Soft Jaws |
| Interrupted or heavier cutting | Hard Jaws or a stronger chuck/cylinder combination |
Hydraulic Chuck Selection Points
- Jaw number and workpiece shape
A 3-jaw hydraulic chuck is the standard choice for round workpieces. A 2-jaw chuck is used for symmetrical shaped parts or special jaws. A 4-jaw chuck provides four-point contact for square or four-sided workpieces. - Through-hole, open-center or closed-center structure
Use a hollow or open-center hydraulic chuck when bar stock, tube stock or long material must pass through the spindle. Use a solid or closed-center hydraulic chuck when the workpiece is short and through-spindle feeding is not needed. - Rotary hydraulic cylinder and drawbar
The cylinder thrust, stroke, mounting method and drawbar connection must match the chuck. The spindle nose, drawbar thread and stroke should be checked before selection. - Clamping force and speed
Hydraulic chuck performance depends on the chuck mechanism, rotary cylinder, pressure setting, jaw configuration and speed. High-speed turning requires attention to balance, safe speed and clamping force reduction. - Soft jaws and hard jaws
Soft jaws are commonly used in batch production to match the workpiece profile. Hard jaws are used for general gripping, rougher work or applications requiring jaw durability. - Hydraulic fluid and maintenance conditions
Filtration, temperature and oil cleanliness affect seal life and clamping stability. If oil maintenance is restricted, pneumatic or manual clamping options should also be reviewed.
Related Workholding Solutions
| Requirement | Related solution |
|---|---|
| Small-batch, repair or wrench-operated workholding | Manual Chucks |
| Clean compressed-air clamping | Pneumatic Chucks |
| Thin-wall or deformation-sensitive round parts | Collet Chucks / Diaphragm Chucks / Rubber-Flex Collets / 6-Jaw Chucks |
| Internal bore location | Expanding Mandrels |
| Pull-down, Ball Lock, face-clamping or pipe-thread workholding | Application-Specific Power Chucks |
| Indexed or multi-angle operations | Indexing Chucks / Rotary Tables |
Power Chuck Selection and Application Guides
FAQ
Is a hydraulic chuck the same as a hydraulic collet chuck?
Not always. In lathe workholding, some customers use the terms loosely, but a hydraulic power chuck usually refers to a jaw-type CNC lathe chuck driven by a rotary hydraulic cylinder and drawbar. A hydraulic collet chuck uses a different clamping mechanism and must be selected separately.
What is the difference between a hydraulic chuck and a manual chuck?
A hydraulic chuck uses a cylinder and drawbar to clamp and release through the machine control. It is better for repeated production and automated cycles. A manual chuck is tightened with a wrench and is often simpler for repair work, trials and small batches.
How do I match a hydraulic chuck with a rotary hydraulic cylinder?
Provide the spindle nose, drawbar thread, drawbar stroke, required clamping force, maximum speed and whether a hollow or solid system is required. The chuck, cylinder and drawbar must be checked as a complete clamping system.
Should I choose a through-hole, open-center or closed-center hydraulic chuck?
Choose a through-hole or open-center hydraulic chuck when bar stock or tubing must pass through the spindle. Choose a solid or closed-center hydraulic chuck when the workpiece is short and through-spindle feeding is not required.
Are hydraulic chucks suitable for thin-wall aluminum parts?
It depends on wall thickness, material, jaw contact and cutting conditions. For deformation-sensitive parts, collet chucks, diaphragm chucks, rubber-flex collets or 6-jaw chucks should also be reviewed before final selection.
What information should I send for hydraulic chuck selection?
Send the workpiece drawing, material, machine model, spindle nose, drawbar information, rotary cylinder model, target speed, cutting load and current clamping issue.