N310EM Single Row Cylindrical Roller Bearing Heavy Duty Brass Cage Bearing 50x110x27mm

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

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.

These dimensions comply with the ISO 15 size series standard, ensuring compatibility with the mounting interfaces of equipment such as reducers and mining machinery.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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).

• 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.

• 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.

• 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.

• 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).