INDUSTRY COMPONENT

Coupling or Flange

A mechanical device that connects two rotating shafts to transmit torque while accommodating misalignment.

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Component Specifications

Definition
A coupling or flange is a precision-engineered component used in drive shafts and actuators to connect two separate rotating shafts, enabling the transmission of torque, speed, and rotational motion from a driving shaft to a driven shaft. It compensates for axial, radial, and angular misalignments between connected shafts, reduces vibration, and protects connected equipment from shock loads. In industrial applications, couplings can be rigid (for precise alignment) or flexible (to accommodate misalignment and dampen vibrations).
Working Principle
Couplings operate by physically linking two shafts through mechanical elements such as hubs, sleeves, or flanges. Torque is transmitted via friction, shear, or positive engagement (e.g., gear teeth, elastomeric elements). Flexible couplings use elastic materials or mechanical clearances to absorb misalignment and dampen vibrations, while rigid couplings maintain a fixed connection for precise alignment. Flanges typically involve bolted connections with gaskets to ensure a sealed, rigid joint.
Materials
Common materials include carbon steel (e.g., AISI 1045 for strength), stainless steel (e.g., 304/316 for corrosion resistance), alloy steel (e.g., 4140 for high torque), aluminum (for lightweight applications), and engineered polymers (e.g., polyurethane for flexible couplings). Coatings like zinc plating or powder coating may be applied for corrosion protection.
Technical Parameters
  • Backlash 0-0.2 mm (for precision couplings)
  • Max Speed 1000-10000 RPM
  • Torque Capacity 50-5000 Nm
  • Temperature Range -40°C to 120°C
  • Bore Diameter Range 10-150 mm
  • Misalignment Tolerance Axial: ±1-5 mm, Radial: ±0.5-3 mm, Angular: ±1-3 degrees
Standards
ISO 9001, ISO 14691, DIN 740, DIN 1151, AGMA 9000

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Coupling or Flange.

coupling flange drive shaft coupling actuator coupling flexible coupling rigid coupling torque transmission shaft misalignment industrial coupling standards Coupling or Flange Coupling or Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Drive Shaft / Actuator

A mechanical component that transmits rotational motion and force within a tool change arm system.

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Engineering Analysis

Risks & Mitigation
  • Misalignment leading to premature wear and failure
  • Over-torque causing shear or fracture
  • Corrosion in harsh environments
  • Vibration-induced fatigue
  • Improper installation (e.g., incorrect bolt torque)
FMEA Triads
Trigger: Excessive misalignment beyond design limits
Failure: Accelerated wear, vibration, and eventual coupling fracture
Mitigation: Regular alignment checks using laser tools, install flexible couplings with higher misalignment tolerance
Trigger: Overload or shock torque exceeding rated capacity
Failure: Shear of coupling elements or bolt failure in flanges
Mitigation: Use couplings with torque limiters or safety factors, implement load monitoring systems
Trigger: Corrosion due to exposure to moisture or chemicals
Failure: Reduced structural integrity and seizure
Mitigation: Select corrosion-resistant materials (e.g., stainless steel), apply protective coatings, conduct routine inspections

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-m, alignment tolerances within ±0.05 mm for precision applications
Test Method
Torque testing per ISO 14691, dynamic balance testing to ISO 1940-1, fatigue testing under cyclic loads, and corrosion resistance testing per ASTM B117

Buyer Feedback

★★★★☆ 4.6 / 5.0 (9 reviews)

"The technical documentation for this Coupling or Flange is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Coupling or Flange so far."

"Testing the Coupling or Flange now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the difference between a coupling and a flange?

A coupling is a device that connects two rotating shafts to transmit torque, often allowing for misalignment. A flange is a type of rigid coupling or connecting ring that bolts two shafts or pipes together, typically used for precise alignment and sealing in high-torque applications.

How do I select the right coupling for my application?

Consider torque requirements, shaft speed, misalignment types and tolerances, environmental conditions (e.g., temperature, corrosion), space constraints, and maintenance needs. Consult manufacturer specifications and standards like ISO 14691 for guidance.

What are common failure modes of couplings?

Common failures include wear from misalignment, fatigue cracking, corrosion, overheating due to excessive torque or speed, and bolt loosening in flanged connections. Regular inspection and alignment checks can mitigate these risks.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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