PNEUMATIC ROTARY EXPANDING COLLET CHUCK

PNEUMATIC ROTARY EXPANDING COLLET CHUCK
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PNEUMATIC ROTARY EXPANDING COLLET CHUCK

A Pneumatic Rotary Expanding Collet Chuck is a power-operated internal gripping workholding system that uses compressed air for automatic clamping during continuous rotation. The expanding collet grips components from the inside diameter with low distortion, making it ideal for thin-wall parts, rings, bushes, and bearing housings in CNC lathes, rotary tables, and 4-axis/5-axis machining applications.

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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