DKAE/DMT Series 45# Steel Disc Coupling – Keyway Design, High Rigidity for Servo/Stepper Motors

Factory direct | S45C steel hubs | 304 stainless steel disc | Keyway design | Zero backlash | 2000 N·m torque | 5000 RPM | Clamping screw fastening | High torsional rigidity | OEM/ODM/OBM

The Apexcoupling DKAE/DMT series is a high-performance disc coupling engineered for precision power transmission in servo motor, stepper motor, and general motion control applications. Featuring S45C steel hubs with keyway design and a 304 stainless steel disc with a stepped disc structure, this coupling delivers exceptional torque capacity, high torsional rigidity, and zero backlash operation. The disc structure provides strong compensation for radial, angular, and axial misalignment while maintaining compact dimensions. With keyway design for secure torque transmission and clamping screw fastening, the DKAE/DMT series is the ideal solution for manufacturing plants, machinery repair shops, food & beverage factories, and general industrial applications requiring high precision and long service life.

✅ High torque rigidity – accurately controls shaft rotation for high-precision control. Specifically designed for servo and stepper motors. Zero clearance shaft-to-sleeve connection – suitable for positive and negative rotation.

Key Technical Specifications

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

Product Structure

1. Two S45C Steel Hubs – High-strength carbon steel, precision-machined, black oxide finish, with keyway design for secure torque transmission.

2. 304 Stainless Steel Disc – Stepped disc structure with excellent fatigue resistance, providing flexibility and misalignment compensation.

3. Clamping Screws – Secure shaft fastening with clamping hub design – provides even clamping force without damaging shafts.

💡 How it works: The disc coupling consists of two hubs connected by a stainless steel disc. Torque is transmitted through the disc, which flexes to accommodate angular, radial, and axial misalignment while maintaining high torsional rigidity. The keyway design provides a secure, positive drive connection for high-torque applications. The stepped disc structure enhances precision and torque capacity.

Product Features & Advantages

Why Disc Couplings Are Ideal for Servo & Stepper Motors

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

✅ The DKAE/DMT series is specifically designed for servo and stepper motors – providing the high torque rigidity and precision required for demanding motion control applications.

Applications

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

• Stepper Motors – Accurate positioning, no lost motion

• CNC Machines – Feed drives, spindle positioning

• Machine Tools – Precision positioning systems

• Packaging Machinery – Registration and indexing systems

• Printing Equipment – Register control, high-speed operation

• Food & Beverage Processing – Hygienic, reliable drives

• Robotics – Joint drives, precision motion

• Semiconductor Equipment – Clean room compatible, high precision

• Textile Machinery – High-speed, precision drives

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

Why Choose Apex Coupling for DKAE/DMT Disc Couplings?

FAQ

Q: What is a disc coupling?
A: A disc coupling (also called a diaphragm coupling) is a metal flexible coupling that uses one or more stainless steel discs to transmit torque while compensating for misalignment. It offers zero backlash, high torsional rigidity, and maintenance-free operation.

Q: What is the difference between DKAE and DMT series?
A: Both are high-performance disc couplings with S45C steel hubs and 304 stainless steel discs. The naming difference may refer to variations in design (e.g., single vs double disc, specific keyway configurations). Both are designed for servo and stepper motor applications.

Q: What materials are used?
A: The hubs are made of S45C carbon steel (45# steel) with black oxide finish. The disc is made of 304 stainless steel – offering excellent fatigue resistance, corrosion resistance, and dust/anti-corrosive properties.

Q: What is the advantage of the keyway design?
A: The keyway design provides a secure, positive drive connection – ensuring reliable torque transmission without slipping, even under high loads.

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

Q: What is the torque and speed rating?
A: Rated torque is 2000 N·m and maximum speed is 5000 RPM. Specific ratings vary by model size.

Q: What misalignment can the coupling compensate for?
A: The disc structure compensates for radial, angular, and axial deviations.

Q: What are the rotation characteristics?
A: Clockwise and counterclockwise rotation characteristics are exactly the same.

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

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

Request a Quote

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