NU 217 ECM Single Row Cylindrical Roller Bearing 85x150x28mm Solid Brass Machined Cage High Radial Load Bearing

1. Product Overview

NU 217 ECM single row NU-type cylindrical roller bearing, standard metric dimension 85×150×28mm.

Model Code Explanation

• NU: Outer ring with double integral flanges, inner ring flange-free separable design; inner ring can slide axially bidirectionally to absorb shaft thermal expansion
• 217: Light-medium heavy load 2-series cylindrical roller bearing size specification
• E: Explorer optimized logarithmic crowned roller & raceway profile, extended effective contact length to boost load rating
• C: Optimized internal flow geometry, smoother grease circulation, lower friction heat generation
• M: One-piece solid machined brass cage, roller centered positioning, stable performance under high speed, heavy vibration and high temperature

This bearing bears pure radial loads only. Modified line-contact rolling surface delivers excellent heavy load and impact resistance. Separable inner ring, outer ring and roller-cage assembly greatly simplify installation, disassembly and on-site maintenance. Ultra-precision superfinished raceway minimizes friction loss and supports continuous stable high-speed operation. Widely matched with heavy-duty industrial motors, gear reducers, hydraulic pumps, screw air compressors, mining conveying equipment, large agricultural machinery and general industrial transmission gearboxes.

2. Technical Specifications

Technical drawings, load characteristic curves and long-cycle high-speed durability test reports are available upon formal request.

3. Core Advantages

1. NU separable floating structure: Inner ring slides freely along axial direction to compensate shaft thermal elongation, eliminate bearing clamping seizure risk
2. E Explorer high-load optimized profile: Logarithmic crowned rollers eliminate edge stress concentration, 20% higher load capacity than standard conventional bearings, longer service life
3. M solid brass machined cage: High tensile strength, anti-fatigue, resistant to high temperature and severe vibration, no deformation under long-term heavy cyclic load
4. C improved internal geometry: Optimized lubricant flow channel, stable oil film between roller ends and outer ring flanges, effectively reduce heat buildup during continuous high-speed rotation
5. High rigidity & shock resistance: Line contact rolling structure maintains stable operation under periodic impact and heavy radial load
6. Low friction superfinished surface: Mirror grinding rollers and raceways cut friction loss, reduce energy consumption for host equipment
7. Globally unified ISO standard dimensions, fully interchangeable with mainstream imported equivalent bearings for convenient aftermarket replacement
8. Complete customizable service: Adjustable internal clearance, outer ring electrical insulation coating, special high-temperature synthetic grease, customer exclusive outer ring laser marking

4. Application Scenarios

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

Perfect for OEM supporting assembly and maintenance replacement of heavy radial load equipment requiring axial thermal expansion floating compensation.

5. Why Choose GQZ Bearing

We own 25 years of professional manufacturing experience for single row cylindrical roller bearings, including NU 217 ECM brass cage Explorer high-load series bearings.

All raw materials adopt vacuum degassing smelting GCr15 bearing steel, full standardized quenching & tempering heat treatment to guarantee uniform hardness and stable metallurgical structure.

One-stop OEM & ODM customization service: clearance grade adjustment, outer ring insulating coating treatment, customized cage material and exclusive laser logo marking.

Strict full-process quality inspection system: raw material composition & hardness test, raceway ultra-precision superfinishing, roller dimensional sorting screening, long-cycle high-speed vibration aging test and batch clearance sampling inspection.

Professional bearing technical engineers provide 24-hour online technical support, covering load matching calculation, shaft/housing tolerance selection and high-speed long-life 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: Chemical composition, hardness and metallurgical structure detection for steel tube blanks
2. Heat treatment: Integral quenching + low-temperature stress relief tempering, control uniform hardness and eliminate internal residual stress
3. Precision machining: CNC turning, raceway ultra-precision grinding, mirror finishing of cylindrical rollers
4. Cage processing: Integral turning of solid brass cage, precise hole positioning to guarantee consistent roller clearance
5. Dust-free assembly workshop: Quantitative grease filling for customized high/low temperature lubrication demand
6. Comprehensive performance testing: High-speed continuous rotation aging test, radial load fatigue test, long-term clearance stability durability test
7. Finished product re-inspection: Full dimension measurement, roundness and surface flaw recheck, anti-rust oil coating, neutral moisture-proof export carton packaging

Every finished production batch passes dynamic vibration and noise testing to guarantee stable operation under long-term heavy-load working conditions.

7. Get A Quote

Submit your purchasing demand for NU 217 ECM cylindrical roller bearings used in heavy-duty industrial motors, industrial gearboxes, hydraulic pumps and air 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 solutions
3. Bearing performance upgrade options: P5 high precision grade, C3 enlarged clearance, outer ring electrical insulation anti-erosion coating
4. Competitive factory direct bulk unit price for large single-model order quantity

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

8. FAQ