N310EM Single Row Cylindrical Roller Bearing 50x110x27mm With Brass Cage

Product Specification

N310EM Cylindrical Roller Bearing 50x110x27mm Heavy Duty Brass Cage Mining Industrial

I. Core Parameters and Structural Design

The N310EM is a single-row cylindrical roller bearing featuring a brass cage (identified by the suffix "EM"). It consists of an inner ring, outer ring, cylindrical rollers, and a machined brass cage. Its structural characteristics include high radial load capacity and low frictional resistance, making it suitable for heavy-load, medium-to-high-speed working conditions.

Key Dimensions:

• Inner diameter (d): 50mm
• Outer diameter (D): 110mm
• Width (B): 27mm
• Weight: Approximately 1.11kg
  These dimensions comply with the ISO 15 size series standard, ensuring compatibility with the mounting interfaces of equipment such as reducers and mining machinery.

Material and Manufacturing Process:
 

• Bearing steel: High-carbon chromium bearing steel (e.g., GCr15) is used, subjected to quenching and tempering. The surface hardness reaches HRC58-62, providing excellent wear resistance and impact resistance.
• Machining precision: Raceway precision is up to class P5, with a surface roughness of Ra≤0.8μm, ensuring smooth operation.

II. Performance Indicators

1. Load Capacity
   • Dynamic radial load (Cₐ): Approximately 87kN
   • Static radial load (C₀ₐ): Approximately 86kN
     It can withstand moderate impact loads, making it suitable for heavy-load scenarios such as crushers and conveyors.
2. Speed Characteristics
   • Speed with grease lubrication: 5600r/min
   • Speed with oil lubrication: 6700r/min
     The cylindrical roller design reduces sliding friction, enabling it to operate at medium to high speeds.
3. Sealing and Lubrication
   • Standard configuration: Open design (no built-in seals), requiring external sealing devices to adapt to dusty or humid environments.
   • Lubrication recommendation: Use lithium-based grease (NLGI Grade 2) with an operating temperature range of -30℃~+120℃. The regular maintenance interval under normal conditions is 2000 hours.

III. Application Fields

1. Industrial Machinery
   • Reducers: Main transmission parts of gearboxes, such as cycloidal pinwheel reducers.
   • Mining equipment: Support shafts of crushers and conveyors.
   • Electrical machinery: Motor bearings and main shaft support of fans.
2. Special Working Conditions
   • Dusty environments: Requires matching with external seals (e.g., labyrinth seals), suitable for cement plants and quarries.
   • Medium-temperature environments: The operating temperature range of -30℃~+120℃ covers most industrial scenarios.

IV. Installation and Maintenance

1. Installation Requirements
   • Tools: Hydraulic or hot mounting methods are recommended (heating temperature ≤120℃) to avoid raceway damage from hammering.
   • Coaxiality control: After installation, the radial runout of inner and outer rings should be ≤0.08mm to ensure operational precision.
   • Bolt preload: M16 mounting bolts are recommended to be tightened to 220N·m (tightened in three gradient steps).
2. Maintenance Standards
   • Lubrication inspection: Check grease condition every 500 hours; shorten the interval in high-temperature environments.
   • Seal monitoring: Regularly inspect wear of external seals and replace them promptly to prevent leakage.
   • Service life prediction: Analyze operational data through vibration monitoring equipment to estimate remaining service life.

V. Technical Alternatives

1. Equivalent Model References
   • Economic alternative: N310 (nylon cage), with 95% of the load capacity of N310EM, suitable for light-load standard working conditions.
   • High-protection type: N310EM/C3 (with increased clearance), suitable for high-temperature environments or scenarios with significant shaft system expansion.
2. Performance Optimization Options
   • High-speed type: Customizable to class P4 precision, with a maximum speed increased to 7000r/min.
   • Long-life type: Using carburized steel (e.g., 20CrMnTi), with a rated life L10 of up to 8000 hours.

VI. Certification and Inspection

1. Quality Control
   • Factory inspection: 100% pass hardness, clearance, and sealing performance tests; sampled products undergo 200-hour life bench tests.
   • Certification standards: Complies with international and domestic standards such as ISO 15 and GB/T 283; CE certification is available (customizable).

Selection Recommendations

• Prioritize N310EM for working conditions involving impact loads, high temperatures, or long service life requirements (e.g., mining machinery, metallurgical equipment).
• Consider alternative models (e.g., N310 with a nylon cage) if cost reduction or lightweighting is needed, but note its temperature resistance limitation (≤80℃).

In practical applications, it is recommended to conduct system matching analysis using professional software based on working condition parameters (speed, load, temperature) to ensure reliability.