Types and Applications of Spider U Joint
2026-07-14
1. Basic Introduction
Spider U joint, also called cross universal joint / Cardan joint, consists of a four-arm cross-shaped spider (cross pin) , two yokes and needle roller bearings. It belongs to unequal velocity universal joints; a single spider U-joint causes rotational speed fluctuation, so it must be used in pairs to achieve uniform output speed.
2. Main Types of Spider U Joints
2.1 Standard Needle Roller Spider U Joint (Most Widely Used)
- Structure: Cross spider + four sets of needle roller bearings + oil seals + snap rings
- Features: Low friction, large torque load capacity, long service life, easy lubrication
- Limitation: Unequal velocity when used alone
Applications
- Propeller shafts of rear-wheel-drive cars, pickup trucks, vans, heavy trucks and coaches
- Agricultural machinery: tractors, combine harvesters, farm transport vehicles
- Construction machinery: loaders, excavators, road rollers
- Industrial equipment: conveyor transmission shafts, mechanical power transfer devices
2.2 Bushed Spider U Joint (Plain Bearing Type)
- Structure: Sliding brass bushings replace needle rollers on the cross spider, no rolling parts
- Features: Low manufacturing cost, simple structure; high friction, easy to wear
Applications
Low-speed, light-load equipment only: small garden machinery, mini hand-operated transport machines, low-power auxiliary transmission mechanisms
2.3 Block Bearing Spider U Joint
- Structure: Solid sliding block bearings fitted on spider journals instead of tiny needle rollers
- Features: Better impact resistance than bushed type, lower cost than needle roller style
Applications
Medium-light agricultural attachments, small industrial conveyor rollers, low-speed engineering accessories
2.4 Heavy-Duty Forged Spider U Joint
- Structure: Integrally forged thick cross spider, oversized needle bearings, reinforced yokes
- Features: Ultra-high torque resistance, strong shock load resistance, suitable for harsh working environments
Applications
Mining trucks, large off-road vehicles, heavy-duty tractors, bulk material transport machinery
2.5 Miniature Spider U Joint
- Small-size compact cross spider, miniature needle bearings
- Features: Small transmission torque, small deflection angle
Applications
Precision machine tools, automation equipment, model machinery, small steering linkage transmission
2.6 Double Spider U Joint (Double Cardan Joint)
- Two integrated spider cross assemblies inside one housing with an intermediate yoke
- Features: Realizes constant velocity rotation without pairing two separate U-joints
Applications
Large SUVs, off-road vehicles, buses with large driveshaft deflection angles, special engineering vehicles
3. Summary Table
| Type of Spider U Joint | Core Characteristics | Typical Applications |
| Standard needle roller spider U-joint | High load, durable, unequal velocity (paired use) | Car/truck prop shafts, tractors, loaders |
| Bushed spider U-joint | Cheap, high friction, low speed | Small garden & light hand machinery |
| Block bearing spider U-joint | Good impact resistance, medium load | Farm attachments, small industrial conveyors |
| Heavy-duty forged spider U-joint | Super high torque, anti-shock | Mining trucks, large off-road equipment |
| Miniature spider U-joint | Compact, low torque | Precision automation, small machine tools |
| Double spider (Double Cardan) U-joint | Constant velocity, large swing angle | Large SUVs, coaches, steep-angle drive systems |
4. Key Notes for Spider U Joint Application
- Single spider U-joint cannot be used alone for stable power transmission; two identical joints with proper alignment are required to counteract unequal speed.
- Need regular grease lubrication to reduce wear of the spider cross and needle bearings.
- For heavy-load and muddy construction/mining scenarios, select forged heavy-duty spider U-joints for longer service life.
Double Row Full Loaded Cylindrical Roller Bearing F-218867
