INDUSTRY COMPONENT

Forearm

Robotic forearm component connecting elbow to wrist for precise positioning and payload handling.

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Component Specifications

Definition
The robotic forearm is a critical structural and functional component of industrial robotic arms, extending from the elbow joint to the wrist assembly. It provides the necessary reach, rigidity, and motion transmission for end-effector positioning while supporting payloads and resisting operational forces. This component houses internal drive mechanisms (harmonic drives, gears, cables) and often integrates wiring/pneumatic lines for tool control.
Working Principle
The forearm functions as a rigid lever arm that transmits rotational motion from the elbow joint to position the wrist in 3D space. It maintains structural integrity under combined bending, torsion, and compression loads while minimizing deflection to ensure positioning accuracy. Internal drive systems convert motor torque into precise angular movements at the wrist.
Materials
Aircraft-grade aluminum alloys (7075-T6, 6061-T6) for standard applications; carbon fiber composites for high stiffness-to-weight ratio; titanium alloys for corrosive environments; steel alloys for heavy payload applications.
Technical Parameters
  • Length 300-1200 mm
  • Weight 2-50 kg
  • Stiffness >100 Nm/deg
  • Repeatability ±0.02-0.1 mm
  • Payload Capacity 5-500 kg
  • Positioning Accuracy ±0.05-0.5 mm
Standards
ISO 9787, ISO 9283, DIN EN ISO 10218-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Forearm.

robotic forearm industrial robot arm component robotic arm structure automation component robotic positioning system Forearm Forearm in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Robotic Arm

Multi-axis articulated manipulator for precise positioning and movement of welding tools

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Engineering Analysis

Risks & Mitigation
  • Structural fatigue failure
  • Bearing wear in joints
  • Vibration-induced positioning errors
  • Corrosion in harsh environments
  • Cable/hose fatigue from repeated bending
FMEA Triads
Trigger: Cyclic loading exceeding material fatigue limits
Failure: Crack propagation leading to structural failure
Mitigation: Regular ultrasonic inspection, finite element analysis during design, implementation of load monitoring systems
Trigger: Inadequate lubrication in elbow/wrist joints
Failure: Increased friction, overheating, and premature bearing failure
Mitigation: Scheduled maintenance with specified lubricants, installation of automatic lubrication systems

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1 mm on critical mounting surfaces, ±0.05° on joint interfaces
Test Method
Laser tracker measurement for positioning accuracy, load deflection testing per ISO 9283, vibration analysis for natural frequency determination

Buyer Feedback

★★★★☆ 4.9 / 5.0 (24 reviews)

"Great transparency on the Forearm components. Essential for our Machinery and Equipment Manufacturing supply chain."

"The Forearm we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

"Found 42+ suppliers for Forearm on CNFX, but this spec remains the most cost-effective."

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Frequently Asked Questions

What factors determine robotic forearm length selection?

Forearm length is determined by required reach, payload capacity, and workspace constraints. Longer forearms increase reach but reduce stiffness and maximum payload capacity due to increased moment arms.

How does forearm material affect robotic performance?

Material selection impacts weight, stiffness, vibration damping, and corrosion resistance. Aluminum offers good strength-to-weight ratio, carbon fiber provides superior stiffness, while steel handles heavier payloads with increased weight.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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