INDUSTRY COMPONENT

Clamping Arm

A clamping arm is a mechanical component in welding fixtures that securely holds workpieces in precise positions during welding operations.

Component Specifications

Definition
A clamping arm is a critical component of welding fixtures and jigs, designed to apply controlled force to hold workpieces firmly against locators or other reference surfaces. It ensures dimensional accuracy and repeatability during welding processes by preventing movement from thermal expansion, vibration, or external forces. Typically featuring adjustable mechanisms, it accommodates various workpiece geometries while maintaining consistent clamping pressure.
Working Principle
The clamping arm operates on mechanical leverage principles, often using pneumatic, hydraulic, or manual actuation. When activated, it pivots or translates to contact the workpiece, applying force through a pad or contact point. This force creates friction and mechanical restraint, locking the workpiece in position against fixture locators. Release mechanisms disengage the arm for loading/unloading.
Materials
High-strength alloy steel (e.g., AISI 4140), hardened to 45-50 HRC for wear resistance; corrosion-resistant coatings (zinc plating or powder coating) optional; pivot pins from case-hardened steel; contact pads from aluminum or urethane to prevent workpiece damage.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Stroke Length50-200 mm
Clamping Force500-5000 N (adjustable)
Rotation Angle90-180 degrees
Weight CapacityUp to 50 kg per arm
Mounting PatternStandardized hole spacing (e.g., 32 mm grid)
Operating Pressure0.4-0.8 MPa (pneumatic models)

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

Standards
ISO 12100, DIN 6325, ISO 10209

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Over-tightening causing workpiece deformation
  • Wear at pivot points leading to misalignment
  • Inadequate force resulting in weld shift
FMEA Triads
Trigger: Worn pivot bushings
Failure: Reduced clamping accuracy and arm wobble
Mitigation: Implement preventive maintenance with lubrication and bushing replacement every 6 months
Trigger: Incorrect pressure settings
Failure: Workpiece slippage during welding
Mitigation: Use calibrated pressure regulators and routine force verification checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Positional tolerance ±0.1 mm under load
Test Method
ISO 230-1 for repeatability testing; force verification via load cell measurement

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Clamping Arm

Manufacturer profiles associated with Clamping Arm.

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Frequently Asked Questions

How do I select the right clamping arm for my welding fixture?

Consider workpiece weight, required clamping force, accessibility, and actuation type (pneumatic for speed, manual for simplicity). Ensure compatibility with your fixture's mounting system and verify stroke/rotation meets clearance needs.

Can clamping arms be used with different workpiece materials?

Yes, but adjust contact pad material: use urethane for delicate surfaces like aluminum, and steel pads for heavy-duty steel workpieces. Always verify force settings to prevent deformation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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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