CPKCA/KCD Precision Detachable Universal Joint Coupling – Single & Double, 42CrMo, H7 Bore

Factory Direct | 42CrMo Alloy Steel | Single (CPKCA) or Double (CPKCW) | 45° Angle Per Joint | H7 Precision Bore | Detachable Design | Black Oxide Finish | Keyway/Hex/Square Hole Options | OEM Customizable

The Apexcoupling CPKCA/KCD series is a high-precision detachable universal joint coupling engineered for reliable power transmission in applications where shafts are not aligned and easy maintenance is critical. Available in single joint (CPKCA/KC type) and double joint (CPKCW/KCD type) configurations, this coupling allows two shafts with an axis angle to achieve continuous rotation and reliably transmit torque and motion. The detachable structure enables quick disassembly and maintenance without disconnecting the entire drive train, significantly reducing downtime.

Manufactured from 42CrMo alloy steel with H7 precision bore and black oxide surface treatment, the CPKCA/KCD series delivers high strength, exceptional wear resistance, and long service life. With 45° angular compensation per joint and large angle compensation capacity, these couplings are the ideal solution for CNC machine tools, packaging machinery, metallurgical equipment, printing machinery, semiconductor equipment, food processing machinery, woodworking equipment, and general automation.

✅ Detachable design – easy maintenance without disassembling the entire system. 42CrMo alloy steel – high strength, uniform hardness, exceptional wear resistance. 45° angle per joint – large angular compensation. H7 precision bore – high concentricity, minimal backlash. Black oxide finish – increased surface hardness and corrosion resistance. Keyway, hexagon, or square hole options – fully customizable. OEM custom bores and materials available.

Key Technical Specifications

🔧 Custom bores, keyways, hexagon/square holes, and special materials (304/316 stainless steel) available. Contact us with your specifications.

CPKCA Series – Model Range & Specifications

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

CPKCW Series (Double Joint) – Model Range

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

CPKCA (Single) vs CPKCW (Double) – Which One Do You Need?

Rule of thumb:

• Use CPKCA (single joint) for applications where shafts are on the same plane but angled – constant-angle, uniform-load applications.

• Use CPKCW (double joint) for applications where shafts are both angled and offset – provides smoother motion and compensates for both angular and parallel misalignment.

💡 The CPKCA/CPKCW series allows two shafts that are not in the same axis to achieve continuous rotation and reliably transmit torque and motion.

Product Structure – Detachable Ball-and-Socket Design

1. Two Yokes (Forks) – Precision-machined from 42CrMo alloy steel with H7 bores.

2. Ball-and-Socket Joint – The defining feature of the CPKCA series; a detachable ball-and-socket design that allows for quick disassembly and maintenance.

3. High-Strength Pins – Crafted from bearing steel with high, uniform hardness.

4. Single Joint (CPKCA) – One pivot point for angular flexibility.

5. Double Joint (CPKCW) – Two pivot points for angular + offset flexibility.

💡 How it works: The CPKCA/CPKCW coupling consists of two yokes connected by a ball-and-socket joint. The detachable structure allows the joint to be disassembled quickly without removing the entire coupling from the shafts – significantly reducing maintenance downtime. The ball-and-socket design provides smooth, continuous rotation even when the two shafts are at an angle. The angle between the two shafts is allowed to change within a limited range (up to 45° per joint) according to working needs.

Product Features & Advantages

Applications

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

• Packaging Machinery – Conveyors, wrapping machines, carton sealers

• Metallurgical Equipment – Rolling mills, continuous casting lines

• Printing Machinery – Register control, high-speed operation

• Semiconductor Equipment – Clean room compatible, high precision

• Food Processing Machinery – Hygienic, reliable drives

• Woodworking Equipment – Multi-spindle drills, routers, saws

• Textile Machinery – Spinning, weaving equipment

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

• Photovoltaic Systems – Solar tracking, precision positioning

• General Industrial Machinery – Pumps, mixers, conveyors

Why Choose Apex Coupling for CPKCA/KCD Universal Joints?

FAQ

Q: What is the difference between CPKCA and CPKCW?
A: CPKCA is a single universal joint – for angular misalignment only. CPKCW is a double universal joint – allows both angular misalignment and parallel offset, providing smoother motion.

Q: What is the advantage of the detachable design?
A: The detachable ball-and-socket design allows for quick disassembly and maintenance without disconnecting the entire drive train – significantly reducing machine downtime in factory automation.

Q: What is the maximum operating angle?
A: Each joint can operate up to 45° limit angle. For continuous operation, we recommend ≤30°.

Q: What materials are used?
A: Standard is 42CrMo alloy steel – offering high strength, uniform hardness, and exceptional wear resistance. We also offer 304/316 stainless steel for corrosion-resistant applications.

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

Q: What bore types are available?
A: We offer keyway, hexagon hole, square hole, and plain round hole.

Q: What is the surface treatment?
A: Standard is black oxide (blackening) – increases surface hardness, reduces friction, and extends service life. Optional finishes include zinc plating and chrome plating.

Q: What are the common applications?
A: CNC machine tools, packaging machinery, metallurgical equipment, printing machinery, semiconductor equipment, food processing, woodworking, textile, and general automation.

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, materials (stainless steel), keyways, hexagon/square holes, and special finishes.

Q: What is the warranty?
A: 1 Year – quality assured.

Request a Quote

Send us your configuration (CPKCA single or CPKCW double), bore size, bore type (keyway/hex/square), and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.