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CPCA/CPCW Precision Universal Joint Coupling – Single/Double, 42CrMo, H7 Bore, 30° Working Angle
Model Number
Check below, custom
| Model | Type | Inner Diameter (mm) | Outer Diameter (mm) | Length (mm) | Features |
|---|---|---|---|---|---|
| 00G | Single | 6 | 12 | 31 | Keyway |
| 01G | Single | 8 | 16 | 36 | Keyway |
| 1GG | Single | 10 | 20 | 42 | Keyway |
| 02G | Single | 12 | 23 | 52 | Keyway |
| 03G | Single | 14 | 25 | 59 | Keyway |
| 04G | Single | 14 | 28 | 60 | Keyway |
| 05G | Single | 16 | 32 | 82 | Keyway |
| 06G | Single | 18 | 36 | 87 | Keyway |
| 07G | Single | 20 | 42 | 94 | Keyway |
| 08G | Single | 22 | 45 | 95 | Keyway |
| 09G | Single | 25 | 50 | 108 | Keyway |
| 10G | Single | 30 | 60 | 122 | Keyway |
| 11G | Single | 35 | 70 | 140 | Keyway |
| 12G | Single | 40 | 80 | 160 | Keyway |
| 13G | Single | 50 | 95 | 190 | Keyway |
| 00GD | Double | 6 | 12 | 49.5 | Keyway |
| 01GD | Double | 8 | 16 | 58 | Keyway |
| 1GD | Double | 10 | 20 | 68 | Keyway |
| 02GD | Double | 12 | 23 | 83 | Keyway |
| 03GD | Double | 14 | 25 | 94 | Keyway |
| 04GD | Double | 14 | 28 | 101 | Keyway |
| 05GD | Double | 16 | 32 | 125 | Keyway |
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Product Description
CPCA/CPCW Precision Universal Joint Coupling – Single/Double, 42CrMo, H7 Bore, 30° Working Angle
Factory Direct | 42CrMo alloy steel | Single (CPCA) or double (CPCW) | 30° working angle | 45° limit angle | H7 precision bore | FA factory automation standard | Keyway/hex/square hole options | 304 stainless steel option | OEM customizable
The Apexcoupling CPCA/CPCW series is a precision universal joint coupling manufactured to FA factory automation standards. Available in single joint (CPCA) and double joint (CPCW) configurations, these couplings are designed for reliable power transmission in packaging machinery, woodworking equipment, multi-spindle drills, metallurgical equipment, and general automation applications. Constructed from 42CrMo alloy steel with optional 304 stainless steel, the CPCA/CPCW 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 keyway, hexagon, or square hole options, the CPCA/CPCW 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 (CPCA) or double (CPCW). 42CrMo or 304SS. 30° working angle (45° limit). H7 bore. Keyway, hexagon, or square hole options. Direct G/GD type replacement.
Key Technical Specifications
| Parameter | CPCA (Single Joint) | CPCW (Double Joint) |
|---|---|---|
| Standard | FA factory automation standard | FA factory automation standard |
| Structure | Single universal joint | Double universal joint |
| Body Material | 42CrMo alloy steel (standard) / 304 stainless steel (optional) | 42CrMo alloy steel (standard) / 304 stainless steel (optional) |
| Fastening Type | Set screw / Pin type | Set screw / Pin type |
| Bore Diameter (d) | 10, 12, 14, 16, 18, 20, 22, 25 mm | 10, 12, 14, 16, 18, 20, 22, 25 mm |
| Outer Diameter (D) | 20, 23, 25, 32, 36, 40, 45, 50 mm | 20, 23, 25, 32, 36, 40, 45, 50 mm |
| Length (L) | 42, 52, 59, 74, 87, 100, 110, 125 mm | 67.5, 83, 94.5, 117.5, 139, 160, 180, 200 mm |
| Allowable Operating Angle | ≤30° (continuous) / 45° (limit) | ≤30° (continuous) / 45° (limit per joint) |
| Max Speed (Pin/Block) | 1000 RPM | 1000 RPM |
| Max Speed (Needle Bearing) | 4000 RPM | 4000 RPM |
| Bore Tolerance | H7 | H7 |
| Bore Options | Keyway, hexagon hole, square hole, plain round | Keyway, hexagon hole, square hole, plain round |
| Surface Treatment | Black oxide, polished, nickel plated, zinc plated, chrome plated | Black oxide, polished, nickel plated, zinc plated, chrome plated |
| Customized support | OEM, ODM, OBM | OEM, ODM, OBM |
| Applicable Industries | Packaging machinery, woodworking, multi-spindle drills, metallurgy, CNC, FA automation | Packaging machinery, woodworking, multi-spindle drills, metallurgy, CNC, FA automation |
| Place of Origin | Guangdong, China | Guangdong, China |
🔧 Custom bores, keyways, hexagon/square holes, materials (304 stainless steel), and special finishes available. Contact us with your specifications.
CPCA (Single) vs CPCW (Double) – Which One Do You Need?
| Feature | CPCA (Single Joint) | CPCW (Double Joint) |
|---|---|---|
| Angular misalignment | ✅ Up to 45° | ✅ Up to 45° per joint |
| Parallel offset | ❌ No | ✅ Yes |
| Total articulation | Up to 45° | Up to 90° |
| Length | Shorter | Longer |
| Weight | Lighter | Heavier |
| Best for | Shafts intersecting at an angle on the same plane | Shafts both angled and offset |
Rule of thumb:
Use CPCA (single joint) for straight-line automation with slight angular misalignment.
Use CPCW (double joint) 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 CPCA/CPCW series offers two bearing options:
| Bearing Type | Max Speed | Dynamic Load Capacity | Best For |
|---|---|---|---|
| Pin/Block (Sliding) | 1000 RPM | Good | Low-speed, high-torque, shock absorption |
| Needle Roller | 4000 RPM | High | High-speed, smooth rotation, precision applications |
⚠️ Note: It is recommended to use the coupling at ≤50% of the maximum rated speed for optimal service life.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| FA Automation Standard | Large conventional stock – rapid delivery. High transmission efficiency. Rapid response in both clockwise and counterclockwise rotation |
| 42CrMo Alloy Steel | High strength, excellent toughness, and fatigue resistance – quenched and tempered for durability |
| 304 Stainless Steel Option | Corrosion-resistant – ideal for food & beverage, marine, and outdoor applications |
| Built-in Bearings & Fixed Pins | Smooth operation up to 30° – reduces wear and extends service life |
| 45° Limit Angle Per Joint | Large angular compensation – accommodates significant misalignment |
| Double Joint (CPCW) Capability | Up to 90° total articulation – handles both angular and parallel offset |
| H7 Precision Bore | High concentricity, accurate shaft fit – reduces vibration |
| Set Screw/Pin Fastening | Secure and reliable connection – easy assembly and disassembly |
| Low Noise & Low Backlash | Precision fit – smooth, quiet operation |
| Multiple Surface Finishes | Black oxide, polished, nickel plated, zinc plated, chrome plated – choose based on your environment |
| Large Semi-Finished Stock | Fast delivery for standard and custom orders |
Material Options – 42CrMo vs 304 Stainless Steel
| Feature | 42CrMo Alloy Steel | 304 Stainless Steel |
|---|---|---|
| Strength | Very high – quenched & tempered | Moderate |
| Toughness & fatigue resistance | Excellent | Good |
| Wear resistance | High | Medium |
| Corrosion resistance | Moderate (needs coating) | Excellent |
| Cost | Lower | Higher |
| Best for | Heavy-duty industrial, high torque, shock loads | Food processing, chemical, marine, outdoor |
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
| Finish | Appearance | Corrosion Protection | Best For |
|---|---|---|---|
| Black Oxide (Standard) | Black, matte | Moderate | General industrial, FA automation |
| Polished (磨光) | Bright, reflective | Low (cosmetic) | Aesthetic applications |
| Nickel Plated | Silver, shiny | Good | Moderate corrosion environments |
| Zinc Plated | Silver, slightly blue | Good | Outdoor, moisture-prone applications |
| Chrome Plated | Bright, reflective | Good | Aesthetic or high-wear applications |
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 CPCA/CPCW Universal Joints?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| FA Automation Standard | Large stock, rapid response, high efficiency |
| Premium 42CrMo Steel | High strength, toughness, and fatigue resistance |
| 304 Stainless Steel Option | Corrosion-resistant for demanding environments |
| Single or Double Joint | One product family covers all angular and offset needs |
| Set Screw/Pin Fastening | Secure, reliable, and easy to assemble |
| Multiple Finishes | Black oxide, polished, nickel, zinc, chrome |
| Built-in Bearings & Fixed Pins | Smooth operation up to 30° – extends service life |
| Large Semi-Finished Stock | Fast delivery for standard sizes |
| OEM Customization | Custom bores, materials, finishes, and special designs available |
Model Designation – CPCA/CPCW Series
CPCA-□□×□□-□□×□□ or CPCW-□□×□□-□□×□□
| Position | Meaning | Example |
|---|---|---|
| CPCA / CPCW | Series code – Single or Double Universal Joint | CPCA |
| □□×□□ | Outer Diameter (D) × Length (L) | 12×31 |
| □□×□□ | Inner Diameter 1 (d1) × Inner Diameter 2 (d2) | 6×6 |
Keyway Option: Add “K” after the shaft diameter.
Example: CPCA-12×31-6K×6K – both bores with keyways
Hexagon Option: Add “F” after the shaft diameter.
Example: CPCA-12×31-6F×6F – both bores with hexagon holes
Square Option: Add “S” after the shaft diameter.
Example: CPCA-12×31-6S×6S – both bores with square holes
FAQ
Q: What is the difference between CPCA and CPCW?
A: CPCA is a single universal joint – for angular misalignment only. CPCW is a double universal joint – allows both angular misalignment and parallel offset, providing smoother motion.
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 stainless steel.
Q: What surface finishes are available?
A: Standard: black oxide. Optional: polished, nickel plated, zinc plated, chrome plated.
Q: What is the fastening method?
A: Set screw / pin type – secure and reliable connection, easy assembly and disassembly.
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 (CPCA single or CPCW double), bore size, material preference, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.
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