Pneumatic Rotary Expanding Collet Chuck is a power-operated internal gripping workholding system designed for continuous rotation and automatic clamping using compressed air.
The expanding collet grips the component from the inside diameter (ID) while rotating, making it ideal for thin-wall parts, rings, bushes, bearing housings, and precision components.
With a built-in pneumatic cylinder and rotary air supply, this chuck enables high-accuracy, low-distortion clamping for CNC lathes, rotary tables, and 4-axis / 5-axis machines.
Key Features
- • Pneumatic (Air-Operated) Internal Expanding Clamping
- • Continuous Rotary Operation
- • High Concentricity & Repeatability
- • Low Distortion – Ideal for Thin-Wall Components
- • Built-in Rotary Cylinder (No Draw Tube Required)
- • Custom Expanding Collet as per Job ID
- • Automation & CNC Ready
Dimension Reference – Pneumatic Rotary Expanding Collet Chuck
Standard Dimension Symbols
|
Symbol
|
Description
|
|
A
|
Outer diameter of chuck
|
|
B
|
Mounting face diameter
|
|
C
|
Expanding collet bore (ID gripping range)
|
|
D
|
Front face thickness
|
|
E
|
Chuck body length
|
|
F
|
Collet expansion stroke
|
|
G
|
Rear pilot / spigot diameter
|
|
H
|
Overall chuck length
|
|
I (PCD)
|
Pitch circle diameter for mounting
|
|
J
|
Mounting bolt size
|
✔ Dimensions are supplied with sectional & front view drawings (PDF/DWG)
✔ Custom PCD & pilot diameter available
Typical Capacity Range (Reference)
|
Model
|
ID Clamping Range
|
Mounting
|
|
EX-25
|
up to 25 mm
|
Flange / Backplate
|
|
EX-42
|
up to 42 mm
|
Flange / Backplate
|
|
EX-60
|
up to 60 mm
|
Flange / Backplate
|
(Exact dimensions depend on component & machine interface)
Operating Parameters
- • Operating pressure: 4 – 8 bar (pneumatic)
- • Clamping type: Internal expanding
- • Max RPM: As per size & balancing
- • Repeatability: ≤ 0.01 mm
- • Rotation: Continuous (rotary air supply)
Applications
- • Thin-wall rings & sleeves
- • Bearing housings & races
- • Bushes, collars & spacers
- • CNC turning & finish machining
- • Rotary table & multi-axis setups
- • Automation & production lines
Why Choose Pneumatic Rotary Expanding Collet Chuck?
✔ Internal grip without deformation
✔ Excellent concentricity during rotation
✔ Faster cycle time with pneumatic actuation
✔ Ideal for delicate & precision components
✔ Export-quality manufacturing standards
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