Coupling Bolt Set

High-Strength Coupling Bolt Set for Turbines, Pumps, Compressors, Gearboxes, and Industrial Power Transmission Systems

Product Overview

A Coupling Bolt Set is a critical fastening assembly used to securely connect two rotating shafts through a mechanical coupling. These precision-engineered bolts are designed to transmit torque, maintain shaft alignment, and withstand dynamic loads, vibration, and cyclic stresses in demanding industrial applications.

Coupling bolt sets are widely used in steam turbines, gas turbines, generators, compressors, pumps, marine propulsion systems, mining equipment, and heavy industrial machinery. Because coupling failures can result in severe equipment damage and costly downtime, coupling bolts must be manufactured from high-strength alloy materials and produced to strict dimensional and mechanical specifications.

At Dawopu, we manufacture OEM-quality Coupling Bolt Sets designed for high-performance power transmission applications. Our bolts are produced using premium alloy steels, advanced heat treatment processes, and precision machining technologies to ensure maximum reliability and service life.

Function of a Coupling Bolt Set

The primary functions of a coupling bolt set include:

• Securely joining coupling flanges
• Transmitting torque between rotating shafts
• Maintaining shaft alignment
• Absorbing dynamic operating loads
• Preventing coupling separation during operation
• Supporting high-speed rotating equipment
• Enhancing overall drivetrain reliability

A properly designed coupling bolt set is essential for the safe and efficient operation of rotating machinery.

Product Features

High Tensile Strength

Designed to withstand heavy torque loads and high clamping forces.

Excellent Fatigue Resistance

Engineered for continuous cyclic loading in rotating equipment.

Precision Machining

Manufactured to tight tolerances for accurate fit and alignment.

Superior Wear Resistance

Optimized materials and heat treatment processes extend service life.

Vibration Resistance

Maintains joint integrity under severe operating conditions.

Corrosion Protection

Optional surface treatments improve durability in harsh environments.

Available Components

A complete Coupling Bolt Set may include:

• Coupling Bolts
• Heavy-Duty Nuts
• Hardened Washers
• Spacer Sleeves
• Locking Devices
• Retaining Components

Sets can be supplied according to OEM specifications or custom requirements.

Material Options

ASTM A193 B7 Alloy Steel

Features:

• High tensile strength
• Excellent toughness
• Widely used in industrial applications

ASTM A193 B16 Alloy Steel

Features:

• Superior high-temperature performance
• Excellent fatigue resistance

AISI 4140 Alloy Steel

Features:

• Outstanding mechanical properties
• Good hardenability
• High wear resistance

42CrMo Alloy Steel

Features:

• Excellent strength-to-weight ratio
• Superior durability

Inconel 718

Features:

• Exceptional high-temperature performance
• Outstanding corrosion resistance

Stainless Steel Options

Available grades include:

• 304 Stainless Steel
• 316 Stainless Steel
• Duplex Stainless Steel

Heat Treatment Options

To maximize performance and durability, Dawopu offers:

• Quenching and Tempering
• Induction Hardening
• Stress Relieving
• Solution Heat Treatment
• Aging Treatment

Typical hardness values are customized according to application requirements.

Technical Specifications

Applications

Steam Turbines

Used in turbine shaft coupling assemblies.

Gas Turbines

Provides secure shaft connections under high-speed operating conditions.

Generators

Supports reliable torque transmission between rotating assemblies.

Industrial Compressors

Maintains coupling integrity in demanding compression systems.

Pumps

Used in centrifugal, process, and power plant pump applications.

Marine Propulsion Systems

Suitable for marine shafting and propulsion equipment.

Mining Equipment

Supports heavy-duty drivetrain and power transmission systems.

Gearboxes

Provides reliable fastening in industrial gearbox couplings.

Dawopu Manufacturing Capability

Dawopu specializes in manufacturing precision industrial fasteners and drivetrain components.

Our capabilities include:

• Hot Forging
• CNC Turning
• Thread Rolling
• Thread Grinding
• Heat Treatment
• Surface Coating
• Mechanical Testing
• Reverse Engineering
• OEM & ODM Manufacturing

We manufacture according to:

• OEM drawings
• ASTM standards
• DIN standards
• ISO standards
• Customer specifications

Quality Assurance

Every Coupling Bolt Set undergoes comprehensive quality control procedures:

• Material certification verification
• Chemical composition testing
• Hardness testing
• Tensile strength testing
• Thread inspection
• Dimensional verification
• Surface finish inspection
• Non-destructive testing
• Final quality approval

These procedures ensure reliable performance in critical rotating equipment applications.

Why Choose Dawopu

• OEM-quality coupling fasteners
• Premium alloy steel materials
• Advanced manufacturing technology
• Competitive factory pricing
• Fast production lead times
• Stable manufacturing capacity
• Professional engineering support
• Global export experience

The Coupling Bolt Set is a critical fastening solution for power transmission systems operating in demanding industrial environments. Manufactured from high-strength alloy materials and engineered for superior fatigue resistance, Dawopu's coupling bolt sets provide reliable torque transmission, secure shaft connections, and long-term operational performance.

Whether for turbines, compressors, generators, pumps, marine propulsion systems, or industrial machinery, Dawopu delivers precision-engineered coupling bolt solutions that meet the highest industry standards.