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WX/WXD Small Cross Universal Joint Coupling – Stainless Steel, Double Pin Block & Needle Roller Bearing
Model Number
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Product Description
WX/WXD Small Cross Universal Joint Coupling – Stainless Steel, Double Pin Block & Needle Roller Bearing, 11.2–1120 N·m
Factory direct | Alloy steel or stainless steel | Double pin block structure | Needle roller bearing option | 11.2–1120 N·m torque | 45° angle per joint | H7 bore | JB/T5901-1991 | OEM customizable
The Apexcoupling WX/WXD series is a precision small cross universal joint coupling designed for reliable power transmission between two shafts on the same plane with angular misalignment up to 45° per joint. Available in single joint (WXD) and double joint (WX) configurations, this coupling delivers nominal torque from 11.2 to 1120 N·m. Manufactured from alloy steel (40Cr) with stainless steel (304/316) options, the series features a double pin block structure with needle roller bearing capability for speeds up to 4000 RPM. The H7 finished bore tolerance supports keyway, hexagon, and square hole customization. With the angle between shafts allowed to vary within a limited range according to working needs, the WX/WXD series is the ideal solution for packaging machinery, woodworking equipment, multi-spindle drills, CNC machines, and general industrial applications.
✅ Single (WXD) or double (WX) joint – up to 45° per joint. Pin block (1000 RPM) or needle roller bearing (4000 RPM). Alloy steel or stainless steel. H7 bore with keyway, hexagon, or square hole options.
Key Technical Specifications
| Parameter | WX Type (Double Joint) | WXD Type (Single Joint) |
|---|---|---|
| Standard | JB/T5901-1991 | JB/T5901-1991 |
| Structure | Double universal joint | Single universal joint |
| Nominal Torque | 11.2 – 1120 N·m | 11.2 – 1120 N·m |
| Maximum Angle Per Joint | 45° (limit) / 30° (recommended) | 45° (limit) / 30° (recommended) |
| Bore Tolerance | H7 | H7 |
| Bore Options | Keyway, hexagon hole, square hole | Keyway, hexagon hole, square hole |
| Pin Block Bearing Speed | Up to 1000 RPM | Up to 1000 RPM |
| Needle Roller Bearing Speed | Up to 4000 RPM | Up to 4000 RPM |
| Material (Standard) | 40Cr alloy steel | 40Cr alloy steel |
| Material (Optional) | 304/316 stainless steel | 304/316 stainless steel |
| Surface Treatment | Black oxide,本色, nickel plated, chrome plated, sandblasted | Black oxide,本色, nickel plated, chrome plated, sandblasted |
| Customized support | OEM, ODM, OBM | OEM, ODM, OBM |
| Applicable Industries | Packaging, woodworking, multi-spindle drills, metallurgy, CNC, automation | Packaging, woodworking, multi-spindle drills, metallurgy, CNC, automation |
| Warranty | 1 Year | 1 Year |
| Place of Origin | Guangdong, China | Guangdong, China |
🔧 Custom bores, keyways, hexagon/square holes, materials (304/316 stainless steel), and special finishes available. Large semi-finished stock – fast delivery. Contact us with your specifications.
WX/WXD Series – Model Range & Specifications
| Model | Nominal Torque (N·m) | dmax (mm) | D (mm) | L (mm) | L1 (mm) | L2 (mm) | L3 (mm) | L4 (mm) | Moment of Inertia (WXD) | Moment of Inertia (WX) |
|---|---|---|---|---|---|---|---|---|---|---|
| WX1 / WXD1 | 11.2 | 10 | 16 | 22 | 30 | 60 | 80 | 20 | 0.05 | 0.07 |
| WX2 / WXD2 | 22.4 | 12 | 20 | 22 | 32 | 64 | 90 | 26 | 0.09 | 0.15 |
| WX3 / WXD3 | 45 | 14 | 25 | 27 | 40 | 80 | 112 | 32 | 0.15 | 0.22 |
| WX4 / WXD4 | 71 | 18 | 32 | 30 | 46 | 92 | 130 | 38 | 0.32 | 0.49 |
| WX5 / WXD5 | 140 | 22 | 40 | 38 | 58 | 116 | 164 | 48 | 0.59 | 0.91 |
| WX6 / WXD6 | 280 | 28 | 50 | 44 | 69 | 138 | 196 | 58 | 1.03 | 1.64 |
| WX7 / WXD7 | 560 | 35 | 60 | 60 | 91 | 182 | 252 | 70 | 2.31 | 3.38 |
| WX8 / WXD8 | 1120 | 42 | 75 | 84 | 122 | 244 | 336 | 92 | 4.41 | 6.63 |
📐 Custom sizes, larger torque ratings, and non-standard dimensions available upon request. Contact our engineering team for custom sizing.
Product Structure – Double Pin Block & Needle Roller Bearing
Two Yokes (Forks) – Precision-machined from 40Cr alloy steel or 304/316 stainless steel.
Cross Shaft (Cross Axis) – The central component that transmits torque.
Double Pin Block Structure – Provides reliable, low-maintenance operation.
Bearing Options:
Pin Block (Sliding) Bearing – Up to 1000 RPM, suitable for low-speed, high-torque applications.
Needle Roller Bearing – Up to 4000 RPM, offers high dynamic load capacity and small bearing clearance.
Single Joint (WXD) – One pivot point for angular flexibility.
Double Joint (WX) – Two pivot points for angular + offset flexibility.
💡 How it works: The WX/WXD series universal joint consists of two yokes connected by a cross-shaped central component. The double pin block structure (or optional needle roller bearings) allows for smooth angular movement while transmitting torque. The single joint (WXD) compensates for angular misalignment only, while the double joint (WX) accommodates both angular misalignment and parallel offset. The angle between shafts is allowed to change within a limited range according to working needs.
WX (Double Joint) vs WXD (Single Joint) – Which One Do You Need?
| Feature | WXD (Single Joint) | WX (Double Joint) |
|---|---|---|
| Angular misalignment | ✅ Up to 45° per joint | ✅ Up to 45° per joint |
| Parallel offset | ❌ No | ✅ Yes |
| Total articulation | Up to 45° | Up to 90° |
| Length | Shorter | Longer |
| Moment of inertia | Lower | Higher |
| Best for | Shafts intersecting at an angle on the same plane | Shafts both angled and offset |
Rule of thumb:
Use WXD (single joint) when shafts are on the same plane but angled.
Use WX (double joint) when shafts are both angled and offset – provides smoother motion.
Bearing Selection – Pin Block vs Needle Roller
| 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 |
✅ Needle roller bearing is recommended for high-speed applications requiring smooth operation and low maintenance.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Wide Torque Range | 11.2–1120 N·m – covers light to medium-duty applications |
| 45° Angular Capacity Per Joint | Large misalignment compensation – accommodates significant angular deviation |
| Single or Double Joint | WXD for angular only, WX for angular + parallel offset |
| Two Bearing Options | Pin block (1000 RPM) or needle roller (4000 RPM) – match your speed requirement |
| H7 Precision Bore | High concentricity, accurate shaft fit – reduces vibration |
| Multiple Bore Options | Keyway, hexagon hole, square hole, or plain – choose your connection type |
| Variable Operating Angle | Angle between shafts can change within limits during operation |
| Multiple Material Options | 40Cr alloy steel (standard) or 304/316 stainless steel – corrosion resistance |
| Multiple Surface Finishes | Black oxide,本色, nickel plated, chrome plated, sandblasted |
| JB/T5901-1991 Standard | Manufactured to established Chinese national standard |
| OEM Customization | Custom bores, materials, finishes, and special designs available |
| Large Semi-Finished Stock | Fast delivery for standard and custom orders |
Material Options – 40Cr Alloy Steel vs 304/316 Stainless Steel
| Feature | 40Cr Alloy Steel (Standard) | 304/316 Stainless Steel (Optional) |
|---|---|---|
| Strength | High (quenched & tempered) | Moderate to high |
| 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 | Food processing, chemical, marine, outdoor |
Our recommendation:
Choose 40Cr alloy steel with black oxide for most industrial applications.
Choose 304/316 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 | Black, matte | Moderate | General industrial |
| Natural (本色) | Raw steel | Low | Low-corrosion applications |
| Nickel Plated | Silver, shiny | Good | Moderate corrosion environments |
| Chrome Plated | Bright, reflective | Good | Aesthetic or high-wear applications |
| Sandblasted | Matte, uniform | Moderate | Industrial, cosmetic finish |
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
Automation Equipment – Pick-and-place systems, indexing tables
General Industrial Machinery – Pumps, mixers, conveyors
Why Choose Apex Coupling for WX/WXD Universal Joints?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Premium Materials | 40Cr alloy steel or 304/316 stainless steel – choose based on your environment |
| Two Bearing Options | Pin block (1000 RPM) or needle roller (4000 RPM) |
| H7 Precision Bore | High accuracy, low backlash, reliable operation |
| Multiple Bore Options | Keyway, hexagon, square, or plain – we machine to your requirements |
| Single or Double Joint | One product family covers all angular and offset needs |
| JB/T5901-1991 Standard | Manufactured to established Chinese national standard |
| Multiple Finishes | Black oxide, nickel plated, chrome plated, sandblasted |
| Large Semi-Finished Stock | Fast delivery for standard and custom orders |
| OEM Customization | Custom bores, materials, finishes, and special designs available |
FAQ
Q: What is the difference between WX and WXD?
A: WXD is a single universal joint – for angular misalignment only. WX is a double universal joint – allows both angular misalignment and parallel offset, providing smoother motion.
Q: What is the maximum operating angle?
A: Each joint can operate up to 45° limit angle. For continuous operation with built-in bearings, we recommend ≤30°.
Q: What bearing options are available?
A: Pin block (sliding) bearing – up to 1000 RPM. Needle roller bearing – up to 4000 RPM, offers high dynamic load capacity and small bearing clearance.
Q: What torque range is available?
A: The standard series covers 11.2 – 1120 N·m. Custom higher torque is available on request.
Q: What materials are available?
A: Standard is 40Cr alloy steel. We also offer 304 and 316 stainless steel for corrosion-resistant applications.
Q: What bore types can I get?
A: We offer keyway, hexagon hole, square hole, and plain hole. Custom bore types available on request.
Q: What is the bore tolerance?
A: Standard finished bore tolerance is H7 for precision shaft fit.
Q: Can the angle change during operation?
A: Yes. The angle between the two shafts is allowed to change within a limited range according to working needs.
Q: What are the common applications?
A: Packaging machinery, woodworking equipment, multi-spindle drills, metallurgy, CNC machines, and general industrial applications.
Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, materials, finishes, and special designs available.
Request a Quote
Send us your configuration (WXD single or WX double), torque requirement, speed, bearing type, material preference, and bore requirements. Our engineers will recommend the optimal model and provide a quotation within 24 hours.
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