High-Precision End Teeth Solutions for Aero Engines and Gas Turbines

Our end teeth solutions are widely applied in aerospace, aviation engines, gas turbines, energy equipment, precision machinery, rail transportation, marine systems, and other high-end industries, providing reliable high-accuracy positioning and high-torque transmission performance for critical rotating components.

Manufacturing Capabilities

Equipped with advanced precision grinding equipment, including:

· CNC internal and external cylindrical grinders

· Precision surface grinders

· CNC vertical grinders

· CNC contour grinders

OBT provides high-precision grinding solutions for complex components such as rotor discs, shafts, crankshafts, elliptical components, and arc-triangular 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

End Teeth Types

Curvic Couplings

High-precision radial positioning coupling technology widely used in aerospace and gas turbine rotor assemblies, providing excellent repeatability, self-centering capability, and high torque transmission.

Hirth Couplings

Precision face-tooth coupling with superior rigidity and positioning accuracy, suitable for high-speed rotating systems requiring compact structure and reliable performance.

Curved End Teeth

The curved tooth profile enables full surface contact between mating teeth, improving load distribution and reducing stress concentration compared with traditional straight teeth.

Sector End Teeth & Straight End Teeth

Customized end tooth designs are available according to different structural requirements, providing optimized solutions for complex rotor and mechanical assemblies.

Precision Performance

OBT end teeth products meet demanding requirements for high-performance rotating equipment:

· Repeat positioning accuracy: ±1"

· Indexing positioning accuracy: ±2"

· Tooth contact area: ≥90%

· Tooth contact ratio: 100%

Through precision grinding and advanced inspection processes, OBT ensures excellent interchangeability, positioning accuracy, and assembly reliability.

High Positioning Accuracy & Self-Centering Capability

Precision-ground end teeth provide accurate positioning and automatic centering after engagement. The large tooth contact area ensures high tooth surface strength and root strength, allowing the coupling to transmit extremely high torque while maintaining stable operation.

Excellent Performance Under Extreme Conditions

Due to uniform heat transfer characteristics and high structural stability, end teeth couplings maintain reliable performance under high-temperature, high-pressure, and high-speed operating conditions, making them ideal for aerospace engines and gas turbine applications.

Compact Structure & Weight Reduction

End teeth technology enables simplified mechanical designs by integrating positioning and torque transmission functions. It helps reduce component weight, overall dimensions, assembly complexity, and maintenance requirements.

Superior High-Speed Performance

The concave-convex curved tooth profile provides full-area surface contact rather than point or line contact. Compared with conventional straight teeth, curved end teeth effectively prevent:

· Tooth edge chipping

· Local stress concentration

· One-sided lifting deformation

· Vibration during high-speed operation

The inward supporting effect of the curved tooth geometry improves centrifugal force resistance, enabling higher rotational speeds and enhanced acceleration performance.

Applications

OBT Aero Rotor Disc End Teeth are widely used in high-performance rotating systems, including:

Aerospace & Gas Turbine Applications

· Aero engine rotor discs

· Gas turbine rotor assemblies

· High-speed turbine shafts

· Compressor rotor systems

· Industrial gas turbine components

Precision Machinery

· CNC machine tool turrets

· Rotary tables

· Milling heads

· Precision indexing systems

· Robotic joints and flexible manufacturing units

Energy & Heavy Equipment

· Gas turbines

· Centrifugal turbo compressors

· Nuclear industry pumps

· Railway locomotives

· Marine propulsion systems

· Steel manufacturing equipment

· Automotive wheel bearing systems

Why Choose OBT?

✓ Complete design and manufacturing capability for Curvic Couplings, Hirth Couplings, and end teeth solutions
✓ Large-scale machining capability up to Ø3400 mm diameter and 6000 mm length
✓ Ultra-high geometric accuracy up to 0.002 mm
✓ Advanced precision grinding and inspection equipment
✓ Customized solutions for aerospace, gas turbine, and industrial applications
✓ Proven capability for complex rotating components and high-performance systems

OBT delivers precision-engineered Aero Rotor Disc End Teeth solutions for the next generation of aerospace engines, gas turbines, and advanced rotating equipment.