Hydraulic Rotary Expanding Collet Chuck is a power-operated, internal gripping workholding system designed for continuous rotation with very high and consistent clamping force. Using hydraulic pressure via a rotary union, the expanding collet grips components from the inside diameter (ID) while maintaining excellent concentricity, rigidity, and stability at higher cutting loads.
It is ideal for 4-axis & 5-axis CNC machining, rotary tables, trunnions, and turning centers, especially for thin-wall parts, rings, bearing housings, and precision bores where OD clamping is not possible.
🔑 Key Features
- 💧 Hydraulic Actuation (High & Constant Clamping Force)
- 🔄 Continuous Rotary Operation
- 🎯 Uniform 360° Internal Expansion
- 🛠️ Low Distortion for Thin-Wall Components
- ⚙️ Rotary Hydraulic Union for Oil Supply
- 🧱 Hardened & Ground Alloy Steel Construction
- 🚀 Stable at High RPM (Dynamically Balanced)
- 🔧 Long Service Life, Low Maintenance
📐 Dimension Reference – Hydraulic Rotary Expanding Collet Chuck
🔩 Dimension Legend
|
Symbol
|
Description
|
|
A
|
Chuck outer diameter
|
|
B
|
Mounting face diameter
|
|
C
|
Expanding collet bore (ID clamping range)
|
|
D
|
Front face thickness
|
|
E
|
Chuck body length
|
|
F
|
Expansion stroke
|
|
G
|
Rear pilot / register
|
|
H
|
Overall length
|
|
I (PCD)
|
Pitch circle diameter (mounting)
|
|
J
|
Mounting bolt size
|
✔ 2D front & sectional drawings (PDF/DWG) available
✔ Custom PCD, pilot diameter & expansion stroke on request
📊 Typical Capacity (Reference)
|
Model
|
ID Clamping Range
|
Max RPM*
|
Mounting
|
|
HRE-25
|
up to 25 mm
|
~3000
|
Flange / Backplate
|
|
HRE-42
|
up to 42 mm
|
~2500
|
Flange / Backplate
|
|
HRE-60
|
up to 60 mm
|
~2000
|
Flange / Backplate
|
*RPM depends on size, balancing class, and application.
⚙️ Operating Parameters
- Hydraulic pressure: 20–35 bar (typical)
- Clamping type: Internal expanding (rotary)
- Repeatability: ≤ 0.01 mm (≤ 0.005 mm optional)
- Control: Hydraulic power pack + rotary union
- Sealing: Coolant & chip resistant design
🏭 Applications
- Thin-wall rings & sleeves
- Bearing housings & races
- Precision bores & collars
- Heavy-duty internal machining
- 4-axis & 5-axis CNC rotary operations
- Automotive, aerospace & precision engineering parts
⭐ Why Choose Hydraulic Rotary Expanding Collet Chuck?
✔ Much higher and steadier grip than pneumatic systems
✔ Internal clamping without OD deformation
✔ Excellent concentricity during rotation
✔ Suitable for heavy cutting & hard materials
✔ Ideal for multi-axis CNC machining
