Editorial Technical Reference

Collet Body / Gripper Jaws

This page explains how Collet Body / Gripper Jaws is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The clamping mechanism of an exchange gripper/collet system that directly contacts and secures workpieces or tools during automated handling operations.

Product Specifications

Technical details and manufacturing context for Collet Body / Gripper Jaws

Definition
The collet body and gripper jaws form the critical interface component of an exchange gripper/collet system used in automated manufacturing and assembly lines. The collet body houses the gripper jaws, which open and close to grasp, hold, and release workpieces or tools with precision. This component enables quick tool changes, workpiece handling, and positioning in robotic systems, CNC machines, and automated assembly equipment. The collet body contains tapered surfaces that interface with the gripper jaws. When axial force is applied (typically via pneumatic, hydraulic, or mechanical actuation), the jaws move radially inward or outward along the tapered surfaces. This radial movement creates the clamping force needed to securely hold workpieces or tools. The system allows for precise centering and repeatable gripping force. Typical specifications include a clamping range of 3–80 mm, clamping force of 5–50 kN at maximum operating pressure, operating pressure of 1.0–1.6 MPa, repeatability of ±0.02 mm, operating temperature range of -10°C to 80°C (above 80°C seals degrade, below -10°C material brittleness), IP rating of IP54–IP65 (per IEC 60529), material grade 20CrMnTi (case-hardened steel for wear resistance, per GB/T 3077), and weight of 0.5–5.0 kg depending on size and design. Materials on file include tool steel, carbide, and hardened alloy steel. These values are directory reference ranges and must be confirmed for the actual model and application. Always verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The collet body contains tapered surfaces that interface with the gripper jaws. When axial force is applied (typically via pneumatic, hydraulic, or mechanical actuation), the jaws move radially inward or outward along the tapered surfaces. This radial movement creates the clamping force needed to securely hold workpieces or tools. The system allows for precise centering and repeatable gripping force.
Common Materials
Tool steel, Carbide, Hardened alloy steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Clamping Range3–80 mmWorkpiece or tool diameter range
Clamping Force5–50 kNAt max operating pressure
Repeatability±0.02 mmClamping position consistency
Max. Operating Temperature80 °CAbove this, seals degrade
Min. Operating Temperature-10 °CBelow this, material brittleness
Material Grade20CrMnTiCase-hardened steel for wear resistanceGB/T 3077
Weight0.5–5.0 kgDepends on size and design

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Jaw Inserts Part
    Replaceable contact surfaces that directly grip workpieces, often with specialized profiles or coatings
    Material: Carbide or hardened steel
  • Tapered Surfaces Part
    Angled surfaces on collet body that convert axial motion to radial jaw movement
    Material: Hardened steel
  • Retention Mechanism Part
    Secures jaws within collet body while allowing radial movement
    Material: Spring steel or retaining rings
  • Collet Body
    The sleeve that carries the tapered surfaces and turns axial pull into radial clamping.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Max 10 bar clamping pressure
other spec: Max workpiece weight: 50 kg, Repeatability: ±0.02 mm, Cycle life: 1 million cycles
temperature: -20°C to 150°C
Media Compatibility
✓ CNC machined metal parts ✓ Precision tool holders ✓ Robotic end-effector components
Unsuitable: Abrasive slurry environments with particulate >50 microns
Sizing Data Required
  • Workpiece diameter range (mm)
  • Required clamping force (N)
  • Interface connection type (e.g., HSK, CAT, ISO taper)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wear-induced slippage
Cause: Abrasive wear from particulate contamination or misalignment causing loss of gripping force and workpiece slippage
Fatigue cracking
Cause: Cyclic loading from repeated clamping/unclamping operations leading to stress concentration at jaw slots or mounting points
Maintenance Indicators
  • Visible scoring or galling on jaw contact surfaces
  • Audible grinding or clicking during clamping cycles
Engineering Tips
  • Implement regular cleaning protocols to remove machining debris and contaminants from collet and jaw surfaces
  • Establish torque-controlled installation procedures and periodic alignment verification to prevent uneven loading

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 15488:2003 - Collets and collet chucks ANSI B5.50-1985 - Collets and collet chucks DIN 6499 - Collets with 8-degree taper for tool shanks

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.01mm
  • Parallelism of clamping surfaces: 0.02mm
Quality Inspection
  • Hardness testing (Rockwell C scale)
  • Dimensional verification with coordinate measuring machine (CMM)

Manufacturers of Collet Body / Gripper Jaws

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Frequently Asked Questions

What is the clamping range of this component?

The directory lists a clamping range of 3–80 mm. This is a reference range; the exact range depends on the specific model and application. Confirm with the manufacturer.

What materials are available for the collet body and gripper jaws?

Materials on file include tool steel, carbide, and hardened alloy steel. The material grade 20CrMnTi is listed as an example of case-hardened steel for wear resistance. Verify material options with the supplier.

What is the operating temperature range?

The listed operating temperature range is -10°C to 80°C. Below -10°C material brittleness may occur, and above 80°C seals degrade. Always confirm the limits for your specific model.

How is the clamping force generated?

Axial force, typically from pneumatic, hydraulic, or mechanical actuation, moves the jaws radially along tapered surfaces in the collet body, creating the clamping force. The system provides precise centering and repeatable gripping force.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.
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