1. Product positioning
Model basis: SWC series heavy-duty universal joint (ISO standard type, customizable).

Core requirements:

High strength: Alloy steel (42CrMo/20CrMnTi) quenched, hardness HRC50-55.

Impact resistance: The dynamic torque bearing capacity reaches 2000Nm (under vibration conditions of building equipment).

Waterproof and dustproof: IP67 protection, suitable for dust and rainwater environments on construction sites.

Customization: Shaft diameter, flange hole spacing, and length are processed according to OEM drawings.

2. Key performance parameters
Project parameter range: Special requirements for the construction industry
Shaft diameter 30mm-150mm (customizable non-standard) commonly used for heavy equipment 50-100mm
Rated torque of 500Nm-5000Nm, impact load requires a safety factor of 1.5 times
Deviation angle single section ≤ 15 ° (double section series can reach 30 °) excavator arm and other large angle compensation scenarios
Speed ≤ 1500rpm (typical speed for propellers/pumps) low-speed high torque characteristics
Working temperature -40 ℃~120 ℃ (suitable for construction sites in cold regions), surface galvanized or sprayed with rust proof coating
3. Customized options
Structural deformation:

Extended middle pipe: Suitable for long wheelbase of construction machinery (such as concrete pump trucks).

Flange/clamping type: matching different equipment interfaces (ISO or SAE flange standards).

Special treatment:

Surface treatment: Dacromet coating (salt spray resistance for 1000 hours), rubber sheath (anti gravel impact).

Safety redundancy: Break the safety pin (prioritize breaking the protection host when overloaded).

4. Typical applications in the construction industry
Tower crane slewing mechanism: SWC-WD type (with self-lubricating bearings, maintenance free).

Spiral drilling rig transmission: designed with a dust cover to prevent soil from entering the cross shaft.

Concrete mixer truck: customized short length coupling to adapt to compact space.

Vibration roller: double-layer flexible membrane type, absorbing high-frequency vibration.

5. OEM service process
Requirement confirmation: shaft diameter, torque, speed, installation space drawings.

Material selection:

Conventional load: 42CrMo alloy steel.

Extreme environment: Stainless steel+carbon fiber composite material (reducing weight by 30%).

Prototype testing: Provide 3D model confirmation → Prototype dynamic load testing (including 500 hour fatigue test).

Batch delivery: 15-30 day cycle (supports laser marking of enterprise logos).

6. Maintenance and lifespan
Lubrication cycle: Inject grease every 200 working hours (Shell Gadus S2 grease is recommended).

Key inspection points:

Cross axis wear (radial clearance>0.5mm needs to be replaced).

Pre tightening force of bolts (regularly re tighten to a torque of 350Nm).

Design lifespan: ≥ 5 years (2 million cycles of load).