INDUSTRY COMPONENT

Shaft/Coupling

Shaft/coupling is a mechanical component that transmits torque between rotating elements in torque sensor systems.

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Component Specifications

Definition
A shaft/coupling assembly in torque sensor applications consists of a rotating shaft connected to a flexible or rigid coupling that transmits rotational force while accommodating minor misalignments between connected components. This critical interface ensures accurate torque measurement by maintaining precise mechanical connection between the driving and driven elements while minimizing measurement interference from external forces.
Working Principle
The shaft transmits rotational motion and torque from the driving element to the torque sensor element, while the coupling provides mechanical connection that accommodates axial, radial, and angular misalignments. In torque measurement applications, the coupling must maintain torsional rigidity while allowing flexibility in other degrees of freedom to prevent measurement errors from bending moments or axial loads.
Materials
Shaft: Typically alloy steel (AISI 4140, 4340) or stainless steel (17-4PH, 316) with hardness 28-32 HRC; Coupling: Aluminum alloy (6061-T6), steel, or engineered polymers (PEEK, Delrin) depending on torque capacity and environmental requirements.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Backlash<0.1°
Max Speed10000 rpm
Torque Capacity5-5000 Nm
Torsional Stiffness1000-10000 Nm/rad
Operating Temperature-40°C to +120°C
Misalignment Tolerance±0.5° angular, ±0.2mm parallel

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 10100, ISO 1940, DIN 740, DIN 115

Parent Products

This component is used in the following industrial products

Torque Sensor (if equipped)

A device that measures the rotational force (torque) applied to a shaft or component within a torque adjustment mechanism.

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Position Encoder / Sensor

A device that detects and converts the linear or angular position of a component within the Leaf Drive Mechanism into an electrical signal for control and feedback purposes.

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Angle Sensor

A sensor that measures angular position or rotation and converts it into an electrical signal.

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Engineering Analysis

Risks & Mitigation
  • Torsional resonance
  • Fatigue failure from cyclic loading
  • Misalignment-induced bearing wear
  • Corrosion in harsh environments
  • Backlash accumulation over time
FMEA Triads
Trigger: Improper alignment during installation
Failure: Premature bearing wear and increased vibration
Mitigation: Implement laser alignment procedures and regular alignment checks
Trigger: Exceeding torque capacity
Failure: Shaft deformation or coupling fracture
Mitigation: Install torque limiters and implement overload protection systems
Trigger: Corrosive environment exposure
Failure: Material degradation and reduced fatigue life
Mitigation: Use corrosion-resistant materials and protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.05mm shaft diameter, ±0.1° angular alignment, balance grade G2.5 per ISO 1940
Test Method
Torsional stiffness testing per DIN 740, fatigue testing per ISO 10100, dynamic balancing per ISO 1940

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 Shaft/Coupling

Manufacturer profiles associated with Shaft/Coupling.

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Frequently Asked Questions

What is the difference between rigid and flexible couplings in torque sensor applications?

Rigid couplings provide maximum torsional stiffness but require perfect alignment, while flexible couplings accommodate misalignments but may introduce slight torsional windup that must be calibrated in precision torque measurement systems.

How does coupling selection affect torque measurement accuracy?

Coupling selection directly impacts measurement accuracy through factors like torsional stiffness, backlash, and damping characteristics. High-stiffness couplings minimize windup errors, while proper damping reduces vibration interference with torque signals.

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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