High-Precision Two-Piece Hirth Coupling Disc for Rotor and Transmission Systems

The two-piece Hirth coupling disc consists of two precision-ground face-tooth components that achieve accurate positioning, automatic self-centering, high torque transmission, and rigid mechanical locking after engagement.

With advanced machining, precision grinding, and inspection capabilities, OBT provides customized Hirth coupling disc solutions for applications requiring high reliability, compact structure, and long-term operational stability.

Advanced Hirth Coupling Manufacturing Capability

OBT has complete capability for:

· Hirth coupling design and manufacturing

· Curvic coupling production

· End teeth profile development

· Precision grinding and finishing

· Reverse engineering and replacement manufacturing

Equipped with advanced precision machining equipment:

· CNC internal and external cylindrical grinders

· Precision surface grinders

· CNC vertical grinders

· CNC contour grinders

OBT manufactures high-precision components including:

· Two-piece Hirth coupling discs

· Rotor coupling discs

· Turbine rotor components

· Compressor shaft connections

· Precision transmission parts

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

Two-Piece Hirth Coupling Design

Precision Face-Tooth Mechanical Connection

The two-piece Hirth coupling disc uses precision-ground radial face teeth to create a highly rigid mechanical connection between rotating components.

After engagement, the teeth provide:

· Precise axial positioning

· Radial self-centering capability

· High resistance to torsional loads

· Stable mechanical locking

The symmetrical tooth geometry ensures uniform contact pressure and reliable performance during continuous operation.

Precision Performance

OBT Two-Piece Hirth Coupling Discs are manufactured according to strict precision requirements:

· Repeat positioning accuracy: ±1"

· Indexing positioning accuracy: ±2"

· Tooth contact area: ≥90%

· Tooth contact ratio: 100%

Advanced grinding and inspection processes ensure:

· Accurate alignment between components

· Excellent interchangeability

· Uniform load distribution

· Long service life

Product Advantages

High Rigidity and Torque Transmission Capability

The Hirth face-tooth design creates a large-area mechanical contact interface, allowing the coupling to transmit high torque loads while maintaining excellent structural rigidity.

Advantages include:

· High tooth surface strength

· Strong tooth root resistance

· Reduced stress concentration

· Improved fatigue performance

High Positioning Accuracy & Self-Centering

The precision radial tooth structure automatically centers during assembly, ensuring:

· Accurate rotor positioning

· Improved concentricity

· Reduced assembly deviation

· Enhanced operating stability

This makes two-piece Hirth coupling discs ideal for high-precision rotating assemblies.

Compact and Lightweight Structure

Compared with multi-piece coupling designs, the two-piece Hirth coupling disc offers:

· Simplified construction

· Reduced component count

· Lower weight

· Easier installation and maintenance

It is particularly suitable for applications requiring compact rotor designs.

Excellent High-Speed Performance

Two-piece Hirth coupling discs maintain reliable performance under high-speed rotation by providing:

· High rotational stiffness

· Reduced vibration

· Improved dynamic balance

· Stable operation under centrifugal forces

Reliable Operation Under Harsh Conditions

The precision-ground tooth surfaces provide excellent resistance against:

· Thermal cycling

· Repeated assembly loads

· High mechanical stress

· Long-duration operation

ensuring reliable performance in demanding industrial environments.

Applications

Aerospace & Aero Engine Systems

· Aero engine rotor assemblies

· Compressor rotor connections

· Turbine rotating components

· High-speed aerospace equipment

Gas Turbine Systems

· Industrial gas turbine rotors

· Turbine shaft connections

· Compressor rotor assemblies

· Power generation equipment

Turbomachinery Applications

· Centrifugal compressors

· Steam turbines

· High-speed rotating machinery

· Precision transmission systems

Precision Machinery

· Machine tool spindles

· Rotary tables

· Indexing systems

· High-accuracy mechanical assemblies

Why Choose OBT Two-Piece Hirth Coupling Disc?

✓ Professional Hirth coupling design and manufacturing capability
✓ Complete precision machining and grinding process
✓ Large-scale machining capability up to Ø3400 mm diameter and 6000 mm length
✓ Ultra-high geometric accuracy up to 0.002 mm
✓ High rigidity, accurate positioning, and high torque transmission capability
✓ Customized solutions based on drawings, samples, and application requirements

OBT provides precision-engineered Two-Piece Hirth Coupling Disc solutions for aerospace, gas turbine, turbomachinery, and precision rotating systems requiring superior accuracy and reliability.