3PB-08 A5 | 8 in Pull-Back Hydraulic Chuck, A5 Mount
The TOP-TOOL 3PB-08 is a 8 in pull-back hydraulic chuck for CNC lathes with an A5 mount. During clamping, the pull-back action draws the workpiece toward a locating surface, helping improve axial seating, repeat length control and workpiece location consistency.
A pull-back hydraulic chuck combines radial clamping with axial seating action. It is intended for applications where radial clamping alone cannot control the workpiece position accurately enough.
Key Features
- Pull-back / draw-down action seats the workpiece against a locating surface during clamping.
- Helps improve repeat length control and end-face location.
- Hydraulic actuation supports repeatable CNC lathe production clamping.
- Suitable when axial positioning is more important than standard radial holding alone.
- Available with source-confirmed spindle mount configurations.
Typical Applications
- Workpieces requiring end-face seating
- Parts requiring repeat length control
- CNC lathe axial locating applications
- Flange, sleeve and disc-type workpieces
- Jobs where radial clamping alone cannot control axial position
Selection Notes
- Confirm the required axial locating face.
- Check pull-back stroke and drawbar movement.
- Match the chuck size, spindle nose and hydraulic cylinder force.
- Review clamping force, maximum speed and cutting load.
- Confirm that the workpiece can be pulled safely against the locating surface.
Technical Specifications
Main Installation Dimensions
| Model | 3PB-08 |
|---|---|
| Spindle Nose | A5 |
| A | 210 |
| B | 100 |
| C | 170 |
| D | 133.4 |
| D1 | 82.56 |
| D2 | 104.8 |
| E | 5 |
| E1 | 23 |
| F | 45 |
| G max | 27 |
| G min | 7 |
| H | 38 |
| J | 37 |
| J1 | 16 |
| K | 75 |
| L1 | 17 |
Stroke and Performance Parameters
| Model | 3PB-08 |
|---|---|
| Spindle Nose | A5 |
| Wedge Stroke | 20 |
| Jaw Stroke(Diameter) | 10.3 |
| Allowable Push/Pull Force kN(kgf) | 16(1630) |
| Max Clamping Force kN(kgf) | 45(4590) |
| Max Speed r/min | 3000 |
| Clamping Range | 28-210 |
| Moment of Inertia kg·m2 | 0.14 |
| Weight kg | 28.9 |
| Matching Cylinder | 100Q |
| Max Pressure MPa(kgf/cm2) | 2.2(22) |
Request a Quote
This product is supplied by quotation. Send your machine model, workpiece drawing, required clamping method and quantity so that the configuration can be reviewed before ordering.