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N310EM Single Row Cylindrical Roller Bearing 50x110x27mm With Brass Cage

Categories Excavator Bearings
Brand Name: Kesle
Place of Origin: CHINA
MOQ: 1
Payment Terms: T/T,Western Union,MoneyGram,PayPal
Delivery Time: 5-8 work days
Bearing Series: Cylindrical Roller Bearing
Bearing Material: Bearing Steel GCr15
Inner diameter: 50 mm
Outer diameter: 110 mm
Width: 27 mm
Model: Customizable
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N310EM Single Row Cylindrical Roller Bearing 50x110x27mm With Brass Cage

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.

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