NU 312 ECM Single Row Cylindrical Roller Bearing 60x130x31mm Brass Cage High Radial Load Bearing

1. Product Overview

NU 312 ECM is a single row NU-type cylindrical roller bearing, standard boundary dimension 60×130×31mmSKF 集....
Model Code Definition

• NU: Outer ring double flanges, inner ring without flange, separable structure, allows bidirectional axial displacement of shaft
• 312: Series & size code, medium heavy load 3-series roller bearing
• E: Optimized roller & raceway logarithmic profile, increased load capacity (Explorer high-performance design)
• C: Enhanced internal geometry, improved lubrication and friction performance
• M: Solid machined brass cage, roller centered, stable under high speed & heavy vibration

This bearing only bears pure radial load, rollers and raceway adopt modified line contact design, outstanding heavy load & impact resistance. Separable inner ring, outer ring and roller-cage assembly, greatly simplify installation and disassembly. Precisely ground raceway surface reduces friction heat generation, supports continuous high-speed operation. Widely matched with heavy-duty industrial motors, gear reducers, hydraulic pumps, air compressors, mining auxiliary transmission equipment, agricultural heavy machinery and general industrial gearboxes.

2. Technical Specifications

Technical drawings, load curve and high-speed durability test reports can be provided upon customer request.

3. Core Advantages

1. NU separable design: Inner ring can slide axially relative to outer ring, compensate shaft thermal elongation, no axial locking risk
2. E optimized high-capacity geometry: Longer effective contact length of rollers, 20% higher radial load capacity than standard type
3. M solid brass cage: High strength, anti-fatigue, resistant to high temperature and severe vibration, no cage deformation under heavy load
4. Modified logarithmic roller profile: Uniform stress distribution, avoid edge stress concentration, extend service life
5. Low friction structure: Fine-ground roller ends and outer ring flanges form stable oil film, reduce heat generation during high-speed operation
6. High rigidity & impact resistance: Line contact rolling structure, stable operation under heavy shock load
7. Standard universal dimension: Fully interchangeable with mainstream brand equivalent bearings, convenient aftermarket replacement
8. Customizable service: Adjustable internal clearance, special high-temperature lubrication, outer ring insulated coating, customer laser logo marking

4. Application Scenarios

• Heavy-duty industrial driving motors, generator main shaft support
• Industrial gear reducers, planetary gearboxes, transmission gear assemblies
• Large hydraulic pumps, screw air compressors, centrifugal fans and blowers
• Mining auxiliary conveying machinery, quarry heavy roller support
• Large agricultural machinery, tractor gearbox, harvesting equipment rotating shaft
• Machine tool intermediate transmission shafts, general engineering mechanical transmission parts

Suitable for OEM supporting assembly and maintenance replacement of all heavy radial load transmission equipment requiring axial floating compensation.

5. Why Choose GQZ Bearing

• We have 25 years of professional production experience of single row cylindrical roller bearings, including NU312ECM brass cage high-load series bearings.
• All raw materials adopt vacuum smelting GCr15 bearing steel, full heat treatment process to guarantee uniform hardness and stable metallurgical structure.
• Complete OEM & ODM one-stop customization service: clearance grade adjustment, insulated outer ring treatment, customized cage material and outer ring laser marking.
• Strict full-process quality control: raw material hardness inspection, raceway superfinishing, roller size sorting, long-cycle high-speed vibration aging test and clearance batch sampling inspection.
• Professional bearing engineers provide 24-hour online technical support, covering load matching calculation, shaft & housing tolerance selection, high-speed lubrication scheme guidance.
• Factory direct bulk wholesale price, stable mass production capacity and sufficient spot inventory to supply global industrial machinery spare parts purchasers.

6. Quality Control

1. Raw material inspection: Composition, hardness and metallurgical structure detection for steel tube blanks
2. Heat treatment: Integral quenching + low temperature tempering, control uniform hardness and internal stress
3. Precision machining: CNC turning, raceway ultra-precision grinding, roller mirror finishing
4. Cage processing: Brass solid cage integral turning, precision hole positioning to ensure roller clearance consistency
5. Assembly process: Dust-free workshop assembly, quantitative grease filling for customized lubrication demand
6. Comprehensive performance test: High-speed continuous rotation aging test, radial load fatigue test, clearance stability long-cycle test
7. Finished product re-inspection: Full dimension measurement, roundness & surface flaw recheck, anti-rust oil coating, neutral moisture-proof export carton packaging

Each batch of finished bearings will pass dynamic vibration and noise testing to ensure stable operation under long-term heavy-load working conditions.

7. Get A Quote

Submit your purchasing demand for NU 312 ECM cylindrical roller bearings used in heavy-duty motors, industrial gearboxes, pumps and compressors.
Full one-stop professional services after inquiry submission:

1. Official standardized quotation document delivered within 24 working hours
2. Professional technical guidance for heavy radial load matching, shaft/housing tolerance selection and high-speed lubrication scheme
3. Bearing performance upgrade options: P5 high precision grade, C3 enlarged clearance, outer ring electrical insulation coating
4. Competitive factory direct bulk unit price for large single-model orders

Please state your order quantity, required clearance grade and actual working conditions (load, rotating speed, temperature, dusty environment) to receive complete formal quotation documents.

8. FAQ