N310EM Cylindrical Roller Bearing 50x110x27 Bearing For Mining Machinery

The N310EM is a single-row cylindrical roller bearing featuring a ribless inner ring and double-ribbed outer ring, designed for industrial scenarios dominated by radial loads.

• Roller Design:
  • 15% more rollers reduce contact stress by 20% and extend service life by 30%
  • Optimized chamfers on roller ends minimize edge stress concentration, suitable for vibrating environments (e.g., mining machinery)
• Cage Technology:
  • EM suffix: Indicates a machined steel cage, which offers 40% higher rigidity than stamped steel cages, ideal for high speeds (DN value up to 6,000)
  • Optional brass cage (N310EM-Cu) enhances corrosion resistance for humid or chemical environments
• Material & Process:
  • Inner/outer rings and rollers use fully hardened high-carbon chromium bearing steel (GCr15), treated with vacuum quenching to improve wear resistance by 25% compared to standard bearings

• High Radial Load Capacity:
  • Radial load capacity is 2.5x higher than deep groove ball bearings of the same size, suitable for gearbox main shafts, conveyor rollers, and other heavy-load scenarios
  • Can be paired with HJ310 adapter sleeves to compensate for shaft installation errors (allowing radial runout ≤0.08 mm)
• High-Speed Stability:
  • The steel cage design reduces centrifugal force impact; vibration levels ≤3.5 mm/s at 6,000 r/min (per ISO 10816), suitable for machine tool spindles, high-speed motors
  • Optional C3 clearance adapts to environments with large temperature fluctuations (e.g., hot rolling mills with temperature differences ≥80°C)
• Long Service Life & Low Maintenance:
  • Roller-guided technology minimizes cage wear; wear ≤0.01 mm after 10,000 hours of continuous operation
  • Standard open design supports high-temperature grease (-30°C ~ +120°C) or oil mist lubrication, extending maintenance intervals by 50%

• Industrial Machinery: Reducer main bearings, textile machine roller shafts, woodworking machine cutting spindles
• Mining Equipment: Crusher roller shafts, vibrating screen drive shafts (resistant to dust and impact loads)
• Machine Tools: Spindle supports for lathes and grinders (paired with precision installation to ensure radial runout ≤0.03 mm)
• Power Equipment: Rotor bearings for small generators (adapting to high speeds and low vibration requirements)

• Shaft & housing tolerances: Shaft uses m6 tolerance; housing uses J7 tolerance to ensure interference fit stability
• Hot fitting process: Heating temperature ≤120°C (to avoid material annealing); recheck radial clearance after cooling (target: 0.02-0.04 mm)
• Alignment precision: Use a laser alignment tool to ensure shaft parallelism ≤0.05 mm/m, preventing premature failure from eccentric loads

• Initial lubrication: Fill with NLGI Grade 2 lithium-based grease (containing MoS₂) at 1/3 of the bearing's internal volume
• Relubrication interval: Refill every 2,000 hours under continuous operation; for high-temperature environments (>80°C), use synthetic ester oil with a flow rate of 0.5-1 L/min

• Vibration monitoring: Use acceleration sensors with an alarm threshold ≥4.5 mm/s (RMS value)
• Temperature monitoring: Check bearing housing temperature with an infrared thermometer; shut down immediately if abnormal temperature rise (>20°C/h) occurs

• N310E (stamped steel cage): 15% lower cost but 20% reduced high-speed performance, suitable for light-load, low-speed scenarios (e.g., conveyor idlers)

• N310EM-Cu (brass cage): 3x improved corrosion resistance, ideal for food processing or chemical equipment
• N310ECP (nylon cage): 40% lighter, suitable for high-speed, low-noise applications (e.g., medical equipment)

• Standard models comply with ISO 15 dimension standards and GB/T 283 load ratings; RoHS-compliant versions are available (lead content ≤0.1%)
• For EU markets, choose CE-certified models to ensure electromagnetic compatibility and safety

• Confirm shaft tolerance, installation space, and load spectrum (static/dynamic ratio) to avoid shortened service life from overloading
• For frequent start-stop conditions, select C4 clearance models to reduce startup torque

• Prioritize manufacturers certified to IATF 16949 (e.g., ZWZ, NSK) to ensure batch consistency
• Request material flaw detection reports (e.g., ultrasonic testing) and life test data to verify actual performance

• Standard models are readily available; customized options (e.g., special clearances, coatings) have a 4-6 week lead time
• Consider consignment inventory to reduce customer stock pressure and capital occupation