SU25 Series Four-Point Contact Slewing Bearings (Non-Geared): Precision Engineering for Heavy-Duty Applications

Product Overview

The PSU25 Series represents a breakthrough in four-point contact slewing bearing technology, engineered to deliver uncompromising performance in demanding industrial environments. As a non-geared variant, this bearing series excels in applications requiring pure rotational motion transmission without the complexity of integrated gear mechanisms. Designed with ISO 7790-2 compliance, the PSU25 family combines advanced material science with precision manufacturing to achieve exceptional load capacity and rotational accuracy.

Key Technical Features

1. Optimized Four-Point Contact Geometry

• **Multi-directional load handling Simultaneously manages axial forces up to 1,850 kN and radial loads reaching 1,250 kN
• 55° raceway contact angle: Optimized for moment load distribution across multiple industrial scenarios
• Precision crowning: Proprietary raceway profiling reduces edge stresses by 32% compared to standard designs

2. Advanced Material Configuration

• Bearing rings: Forged from 42CrMo4 alloy steel (HRC 58-62)
• Heat treatment process: Vacuum carburizing with deep-case hardening (4-6mm depth)
• Rolling elements: Grade 20 ceramic-coated steel balls with ±0.001mm diameter tolerance

3. Sealing & Lubrication System

• Triple-labyrinth sealing architecture (IP66 equivalent protection)
• Integrated grease reservoirs with MX-2 Extreme Pressure lubricant
• Automatic lubrication ports compatible with centralized systems

Performance Advantages

• Rotational accuracy: <0.05mm radial runout under full load
• Fatigue life: L10 rating exceeding 100,000 operating hours
• Temperature tolerance: -40°C to +120°C operational range
• Corrosion resistance: 1,000-hour salt spray test compliance

Industrial Applications

Heavy Machinery

• Tower crane slewing mechanisms
• Hydraulic excavator platforms
• Tunnel boring machine rotation assemblies

Renewable Energy Systems

• Pitch control systems for 3MW+ wind turbines
• Solar tracker azimuth drives

Specialized Equipment

• Robotic welding positioners
• Military vehicle turret systems
• Medical imaging device rotators

Customization Capabilities

• Bore diameters: 250mm to 2,500mm (standard range)
• Flange configurations: Single/double flange options
• Mounting patterns: Custom bolt circle arrangements Surface treatments: Zn-Ni coating or Dacromet anti-corrosion

1. Material Certification: EN 10204 3.1 Mill Certificates
2. Dimensional Verification: CMM inspection (ISO 10360-2)
3. Hardness Testing: Rockwell & Vickers methods
4. Non-Destructive Testing:

• particle inspection (ISO 17638)
• Ultrasonic flaw detection (ISO 11484)

TKD Information

• Title: PSU25 Series Four-Point Contact Slewing Bearings | Non-Geared Heavy-Duty Solutions
• Keywords:
• High-capacity slewing bearing
• Four-point contact bearing
• Industrial equipment bearings
• Custom slewing rings
• Description: Explore the PSU25 Series four-point contact slewing bearings - engineered for extreme load capacities and precision rotation in heavy machinery, renewable energy systems, and specialized industrial equipment. Features advanced material technology and customizable configurations.