High-Precision Hirth and Curvic Coupling Teeth for Advanced Rotor Systems

The three-piece Hirth coupling disc consists of precisely manufactured face-tooth components that provide accurate positioning, self-centering capability, high torque transmission, and exceptional structural rigidity.

With advanced machining, precision grinding, and inspection capabilities, OBT delivers customized Hirth coupling disc solutions based on customer drawings, samples, and application requirements.

Advanced Hirth Coupling Manufacturing Capability

OBT has comprehensive capability in:

· Hirth coupling design and manufacturing

· Curvic coupling production

· End teeth profile development

· Precision grinding and finishing

· Reverse engineering and replacement manufacturing

Our advanced equipment includes:

· CNC internal and external cylindrical grinders

· Precision surface grinders

· CNC vertical grinders

· CNC contour grinders

Supporting the production of:

· Three-piece Hirth coupling discs

· Rotor coupling components

· Turbine rotor parts

· Compressor rotating assemblies

· Precision transmission components

Machining Capacity

· Maximum end teeth machining diameter: Ø3400 mm

· Maximum machining length: 6000 mm

· Maximum vertical grinding swing diameter: 2500 mm

· Maximum contour grinding swing diameter: 1200 mm

· Machining range: Ø30 mm – Ø2500 mm

· Geometric accuracy: ≤0.002 mm

Three-Piece Hirth Coupling Design

Precision Three-Part Face Tooth Structure

The three-piece Hirth coupling disc utilizes precision-ground radial face teeth to achieve accurate mechanical engagement between mating components.

The structure provides:

· High positioning accuracy

· Automatic self-centering

· Increased connection rigidity

· Reliable torque transmission

Compared with conventional key or spline connections, Hirth coupling discs provide superior alignment performance and reduced mechanical deformation.

Precision Performance

OBT Three-Piece Hirth Coupling Discs are manufactured to meet demanding requirements for high-performance rotating equipment:

· Repeat positioning accuracy: ±1"

· Indexing positioning accuracy: ±2"

· Tooth contact area: ≥90%

· Tooth contact ratio: 100%

Precision grinding ensures:

· Uniform tooth engagement

· High repeatability during assembly

· Accurate rotor positioning

· Long service life

Product Advantages

High Rigidity and Reliable Mechanical Locking

The radial face-tooth design creates a strong mechanical connection after engagement, providing excellent resistance against:

· Axial displacement

· Torsional loads

· Operating vibration

· Repeated loading cycles

This makes three-piece Hirth coupling discs ideal for high-performance rotating systems.

High Torque Transmission Capability

The large contact surface between mating teeth distributes loads evenly across the coupling interface.

Benefits include:

· Higher torque capacity

· Reduced tooth stress

· Improved fatigue resistance

· Stable operation under heavy loads

Superior Positioning Accuracy

The precision-ground teeth provide automatic centering during assembly, ensuring:

· Accurate component alignment

· Improved concentricity

· Reduced rotor imbalance

· Enhanced system efficiency

Excellent High-Speed Performance

For high-speed rotating equipment, the three-piece Hirth coupling structure provides:

· High rotational stability

· Reduced vibration

· Improved dynamic balance

· Reliable operation under centrifugal forces

Compact and Lightweight Connection Design

The Hirth coupling disc combines positioning and torque transmission functions into a compact structure, enabling:

· Reduced assembly complexity

· Space-saving design

· Easier maintenance

· Improved overall equipment performance

Applications

Aerospace & Aero Engine Systems

· Aero engine rotor assemblies

· Compressor rotor connections

· Turbine rotating components

· High-speed aerospace machinery

Gas Turbine Applications

· Gas turbine rotor systems

· Turbine shaft connections

· Compressor assemblies

· Power generation equipment

Industrial Turbomachinery

· Centrifugal compressors

· Steam turbines

· High-speed rotating equipment

· Precision transmission systems

Machine Tools & Precision Equipment

· High-speed spindles

· Rotary tables

· Indexing mechanisms

· Precision positioning systems

Why Choose OBT Three-Piece Hirth Coupling Disc?

✓ Professional Hirth coupling design and manufacturing capability
✓ Complete process from engineering development to precision grinding
✓ Large-scale machining capability up to Ø3400 mm diameter and 6000 mm length
✓ Ultra-high geometric accuracy up to 0.002 mm
✓ High rigidity, high torque transmission, and precision positioning performance
✓ Customized solutions for aerospace, gas turbine, and industrial applications

OBT delivers precision-engineered Three-Piece Hirth Coupling Disc solutions for high-performance rotating systems requiring maximum accuracy, rigidity, and reliability.