DSEJG Aluminum Single Diaphragm Coupling – Set Screw Type, Zero Backlash for Servo/Stepper Motors

Factory direct | High-strength aluminum alloy hubs | 304 stainless steel diaphragm | Zero backlash | High torsional rigidity | Low inertia | Set screw fastening | H7 bore | OEM customizable

The Apexcoupling DSEJG series is a high-performance aluminum single diaphragm coupling engineered for precision power transmission in servo motor, stepper motor, and high-speed CNC applications. Featuring high-strength aluminum alloy hubs with a 304 stainless steel diaphragm, this coupling delivers zero backlash operation, high torsional rigidity, and excellent misalignment compensation. The set screw fastening provides secure shaft connection, while the low inertia design enables rapid acceleration and deceleration – making it ideal for high-speed applications. With H7 precision bore, compact dimensions, and maintenance-free operation, the DSEJG series is the perfect solution for CNC machine tools, packaging machinery, semiconductor equipment, printing machinery, and factory automation.

✅ Zero backlash, high torsional rigidity, and low inertia – designed for servo motors, stepper motors, and high-speed precision drives.

Key Technical Specifications

🔧 Custom bores, outer diameters, lengths, and special finishes available. Contact us with your specifications.

DSEJG Series – Model Range

📐 Additional sizes and custom dimensions available upon request. Contact our engineering team for custom sizing.

Product Structure

1. Two Aluminum Hubs – High-strength aluminum alloy, precision-machined, anodized finish, with set screw holes.

2. 304 Stainless Steel Diaphragm – Single disc providing flexibility, misalignment compensation, and vibration absorption.

3. Set Screws – Secure shaft fastening with socket head cap screws.

💡 How it works: The DSEJG single diaphragm coupling consists of two aluminum hubs connected by a 304 stainless steel diaphragm. Torque is transmitted through the diaphragm, which flexes to accommodate angular, axial, and limited radial misalignment while maintaining high torsional rigidity. The set screw fastening provides secure shaft connection, while the low inertia design enables rapid acceleration and deceleration – making it ideal for high-speed servo and stepper motor applications. The stainless steel diaphragm absorbs vibration and compensates for parallel, angular, and axial misalignment.

Product Features & Advantages

Why Single Diaphragm Couplings Are Ideal for Servo & Stepper Motors

Single diaphragm couplings are specifically designed for servo and stepper motor applications due to their unique characteristics:

✅ The DSEJG series is specifically designed for servo motors and stepper motors – providing the high torsional rigidity, zero backlash, and low inertia required for demanding motion control applications.

Applications

• Servo Motors – High-precision motion control, zero backlash requirement

• Stepper Motors – Accurate positioning, no lost motion

• CNC Machine Tools – Spindle drives, feed axes, high-precision positioning

• Packaging Machinery – Registration and indexing systems

• Semiconductor Equipment – Clean room compatible, high precision

• Printing Machinery – Register control, high-speed operation

• Robotics – Joint drives, precision motion

• Factory Automation – Pick-and-place systems, indexing tables

• Medical Devices – Precision motion systems

Why Choose Apex Coupling for DSEJG Diaphragm Couplings?

FAQ

Q: What is a single diaphragm coupling?
A: A single diaphragm coupling consists of two hubs connected by a single stainless steel diaphragm. It transmits torque through the diaphragm while compensating for angular, axial, and limited radial misalignment.

Q: What is the advantage of the set screw fastening?
A: Set screw fastening provides simple and reliable shaft connection – easy installation and adjustment without special tools.

Q: What materials are used?
A: The hubs are made of high-strength aluminum alloy with anodized finish. The diaphragm is made of 304 stainless steel – imported elastic stainless steel with high elasticity and torque capacity.

Q: Does the coupling have backlash?
A: No. The DSEJG series features zero backlash – no rotational clearance, ensuring precise positioning for servo and stepper motors.

Q: What is the torsional rigidity?
A: The coupling features high torsional rigidity – accurately controls shaft rotation for high-precision control .

Q: Is the coupling suitable for high-speed applications?
A: Yes. The low inertia design makes it suitable for high-speed operation .

Q: What is the bore tolerance?
A: Standard bore tolerance is H7 for precision shaft fit and high concentricity.

Q: Is the coupling maintenance-free?
A: Yes. No lubrication required – reduces operating costs and maintenance schedules.

Q: What are the common applications?
A: Servo motors, stepper motors, CNC machine tools, packaging machinery, semiconductor equipment, printing machinery, and factory automation.

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, outer diameters, and lengths available.

Request a Quote

Send us your bore size, outer diameter, torque, speed, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.