BA246-2A Excavator Slewing Bearing 246x313x33mm For Construction Excavator

BA246 2A Slewing Bearing 246×313×33mm For Construction Excavators

Basic Parameters

1. Type and Structure
   A single-row ball slewing bearing, composed of inner ring, outer ring, rolling elements (steel balls), and cage, featuring a high-rigidity and low-friction design. In the model, "246" corresponds to an inner diameter of 246mm, and "2A" indicates a double-row sealed or reinforced structure.
2. Dimensional Parameters
   • Inner diameter: 246mm
   • Outer diameter: 313mm
   • Thickness: 33mm
     Suitable for compact space requirements and capable of high-load transmission.
3. Material and Process
   Made of high-carbon chromium bearing steel (e.g., GCr15), subjected to quenching and tempering. Surface hardness reaches HRC58-62, with wear-resistant and impact-resistant properties. Raceway precision is above class P5, surface roughness Ra≤0.1μm, and friction coefficient ≤0.0015.

II. Performance Indicators

1. Load Capacity
   • Dynamic load rating: 2000kN (axial) + 1500kN (radial)
   • Overturning moment: 3500kN·m
     Capable of withstanding severe impact loads during construction machinery operation.
2. Sealing and Lubrication
   • Sealing structure: Double-lip nitrile rubber seal (2RS) combined with labyrinth dustproof design, effectively blocking dust and muddy water.
   • Lubrication system: Built-in lithium-based grease (NLGI Grade 2), operating temperature range -30℃~+120℃, maintenance-free during service life.
3. Reliability Parameters
   • Rotary precision: ≤0.05mm (preload assembly eliminates clearance)
   • Vibration and noise: Class P5 raceway precision reduces operating noise by over 15dB
   • Impact resistance: Able to withstand instantaneous impact of 3 times the rated load

III. Application Specifications

1. Typical Applications
   • Construction machinery: Excavator travel reducers, rotary platforms of medium and small cranes
   • Mining machinery: Steering axles of mining trucks, traveling wheel sets of port gantry cranes
   • Special working conditions: Dust environments (IP67 protection class), extremely cold regions at -40℃ (optional low-temperature grease)
2. Installation Requirements
   • Installation tools: Special hydraulic tooling required to avoid raceway damage from hammering
   • Bolt preload: Recommended torque for M24 bolts is 450N·m (tightening in torque gradients required)
   • Coaxiality: After installation, check inner/outer ring runout ≤0.08mm
3. Maintenance Standards
   • Lubrication interval: Replenish grease every 2000 hours under normal working conditions
   • Seal inspection: Check seal lip wear every 500 hours
   • Service life prediction: Estimate remaining life by inputting working condition data (rotational speed, load, temperature) into online tools

IV. Technical Alternatives

1. Equivalent Model References
   • Model A: Dimensions 246×313×33, load capacity up to 95% (suitable for standard working conditions)
   • Model B: ZKLN246313.2RS structure, seal grade upgraded to IP69K (suitable for extremely cold/high-dust environments)
2. Performance Alternatives
   • High-speed type: Customizable to class P4 precision, maximum rotational speed increased to 120r/min
   • Long-life type: Using carburized steel material, rated life extended to L10=5000 hours

V. Inspection and Certification

1. Factory Inspection
   • 100% inspection items: Raceway hardness, clearance, sealing performance
   • Sampling inspection items: Dynamic load test (3% sampling per batch), life bench test (≥100 hours)
2. Certification Standards
   • Compliant with ISO 104 standard (non-standardized BA series)
   • Optional certifications: CE certification (Pressure Equipment Directive), RoHS environmental certification