UNCA/UNCW & CSCA/CSCW Precision Universal Joint Coupling – FA Automation Standard, 42CrMo / 304SS, 45° Angle

Factory direct | FA factory automation standard | 42CrMo alloy steel or 304 stainless steel | Single (UNCA/CSCA) or double (UNCW/CSCW) | Pin or keyway fastening | 45° angle per joint | 20.1 N·m torque | H7 bore | 4000 RPM | Large stock | OEM/ODM/OBM

The Apexcoupling UNCA/UNCW and CSCA/CSCW series are precision miniature universal joint couplings manufactured to FA factory automation standards – offering a direct, cost-effective replacement for Misumi UNCA/UNCW couplings. Available in single joint (UNCA/CSCA) and double joint (UNCW/CSCW) configurations, these couplings are designed for reliable power transmission in packaging machinery, woodworking equipment, multi-spindle drills, metallurgical machinery, and general automation applications. Constructed from 42CrMo alloy steel with optional 304 stainless steel, the series delivers high strength, excellent wear resistance, and long service life. The built-in bearings and fixed pins allow for smooth operation up to 30° in continuous use, with a 45° limit angle per joint. Featuring H7 precision bore with pin-type or keyway fastening, the UNCA/UNCW series offers rapid bidirectional response, high transmission efficiency, and low noise operation – making it the ideal choice for demanding FA automation environments.

✅ FA factory automation standard – large stock, rapid response, high efficiency. Single (UNCA/CSCA) or double (UNCW/CSCW). Pin or keyway fastening. 42CrMo or 304SS. 45° limit angle per joint. Direct Misumi UNCA/UNCW replacement.

Key Technical Specifications

🔧 Custom bores, keyways, hexagon holes, materials (304/316 stainless steel), and special finishes available. Large semi-finished stock – fast delivery. Contact us with your specifications.

UNCA/UNCW & CSCA/CSCW – Model Range & Specifications

UNCA / CSCA (Single Joint – Pin Type / Keyway Type)

UNCW / CSCW (Double Joint – Pin Type / Keyway Type)

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

UNCA/UNCW vs CSCA/CSCW – Fastening Type Comparison

💡 UNCA/UNCW features pin/set screw fastening – ideal for standard FA automation applications. CSCA/CSCW features keyway fastening – ideal for applications requiring secure, high-torque connections.

UNCA (Single) vs UNCW (Double) – Which One Do You Need?

Rule of thumb:

• Use single joint (UNCA/CSCA) for straight-line automation with slight angular misalignment.

• Use double joint (UNCW/CSCW) for applications where shafts are both angled and offset – common in conveyors, packaging machinery, and multi-spindle drills.

💡 Double joint configurations provide smoother power transmission and reduced vibration when both angular and parallel misalignment are present.

Bearing Selection – Pin/Block vs Needle Roller

The UNCA/UNCW series offers two bearing options:

⚠️ Note: It is recommended to use the coupling at ≤50% of the maximum rated speed for optimal service life.

Product Features & Advantages

Material Options – 42CrMo vs 304 Stainless Steel

Our recommendation:

• Choose 42CrMo with black oxide for most industrial and factory automation applications.

• Choose 304 stainless steel for food & beverage, chemical, marine, or outdoor applications where corrosion resistance is critical.

Surface Finish Options

Applications

• Packaging Machinery – Conveyors, wrapping machines, carton sealers

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

• Multi-Spindle Drills – Precision drilling operations

• Metallurgical Equipment – Rolling mills, continuous casting lines

• CNC Machines – Feed drives, positioning systems

• Printing Equipment – Register control, high-speed operation

• Textile Machinery – Spinning, weaving equipment

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

• General Industrial Machinery – Pumps, mixers, conveyors

Why Choose Apex Coupling for UNCA/UNCW Universal Joints?

FAQ

Q: What is the difference between UNCA and CSCA?
A: Both are single universal joints. UNCA features pin/set screw fastening (固定銷型), while CSCA features keyway fastening (鍵槽型). Both are interchangeable with Misumi series.

Q: What is the difference between UNCW and CSCW?
A: Both are double universal joints. UNCW features pin/set screw fastening (固定銷型), while CSCW features keyway fastening (鍵槽型).

Q: What is the maximum operating angle?
A: With built-in bearings and fixed pins, the coupling is designed for continuous operation up to 30°. The absolute limit per joint is 45°.

Q: What bearing options are available?
A: Pin/block (sliding) bearing – up to 1000 RPM. Needle roller bearing – up to 4000 RPM. It is recommended to use at ≤50% of maximum rated speed.

Q: What materials are available?
A: Standard is 42CrMo alloy steel. We also offer 304 and 316 stainless steel.

Q: What surface finishes are available?
A: Standard is black oxide. We also offer polished, nickel plated, zinc plated, and chrome plated.

Q: Is this coupling interchangeable with Misumi UNCA/UNCW?
A: Yes. The UNCA/UNCW series is a direct replacement for Misumi UNCA/UNCW – no design changes required.

Q: What are the common applications?
A: Packaging machinery, woodworking equipment, multi-spindle drills, metallurgy, CNC machines, and general automation.

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, materials, finishes, and special designs available.

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

Request a Quote

Send us your configuration (single or double), fastening type (pin or keyway), material preference, bore size, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.