NU2205-EM Single Row Cylindrical Roller Bearing 25x52x18mm Machined Brass Cage Floating Radial Bearing

1. Product Overview

NU2205-EM is single row NU-type separable cylindrical roller bearing, dimension 25×52×18mm. E represents optimized logarithmic roller profile for boosted dynamic & static load capacity; EM stands for solid machined brass cage with high impact resistance. Double ribs on outer ring, rib-free inner ring enables free bidirectional axial floating to absorb thermal elongation of long shafts. Separable inner and outer rings simplify mounting and disassembly. Open structure supports regular relubrication, stable under medium-high speed heavy radial loads. Widely used in industrial motors, miniature gear reducers, water pumps, fan spindles and light construction machinery transmission shafts.

2. Technical Specifications

Model: NU2205-EM
d:25mm, D:52mm, B:18mm
Fw roller inner diameter:31.5mm
Min fillet r:1mm, r1:0.6mm
Max allowable axial displacement:1.8mm
Dynamic load Cr:35kN, Static load C0r:34.5kN
Grease limiting speed:12000r/min
Net weight:0.167kg
Structure: Single row NU floating type, open separable
Cage: Solid machined brass EM cage
Material: Vacuum smelting GCr15 bearing steel, hardness HRC60-65
Clearance: Standard CN, C3/C4 customizable
Precision: P0 standard, P5 optional
Operating temperature: -30℃ ~ 120℃
Dimension drawings and durability test reports available on request.

3. Core Advantages

• Separable inner & outer ring design, easy independent installation and maintenance
• E enhanced roller geometry greatly improves load capacity and fatigue life
• EM solid brass cage withstands heavy shock, high temperature and continuous heavy load
• NU floating structure eliminates thermal expansion stress by free axial shift
• Open end design allows convenient supplementary grease filling to extend service life
• Compact 22-series narrow width saves installation space for compact transmission equipment
• Custom loose clearance, high-temperature grease and outer ring laser marking available

4. Application Scenarios

• Motor industry: Medium-small asynchronous motor rotor supports, servo motor spindles
• Transmission equipment: Mini gear reducers, variable speed box intermediate shafts
• General machinery: Cooling fans, industrial water pumps, packaging drive rollers
• Light machinery: Mini hydraulic pump parts, small winch transmission shafts

Fit OEM assembly and aftermarket replacement of medium-speed heavy radial load industrial rotating equipment.

5. Why Choose GQZ Bearing

25 years professional production of NU series cylindrical roller bearings. High-purity vacuum smelting GCr15 steel with complete quenching and tempering heat treatment. Full OEM & ODM customization for clearance grade, cage material and special lubricant. Strict full-process inspection includes raw material hardness test, ultra-precision raceway mirror grinding, roller sorting and heavy-load vibration aging test. 24-hour professional technical support for floating shaft layout design and periodic relubrication maintenance plans. Factory direct bulk price, stable medium-size roller bearing spot inventory for global motor and gearbox manufacturers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching and stress relief tempering to eliminate internal residual stress
3. CNC ultra-precision inner and outer ring cylindrical raceway mirror grinding
4. High-precision cylindrical roller screening and solid brass cage precision machining
5. Dust-free assembly with multi-type mechanical grease filling options
6. Continuous rotation aging and heavy radial load durability cycle testing
7. Full dimension inspection, anti-rust oil coating, neutral moisture-proof export carton packaging

Each batch completes temperature rise and vibration test to guarantee stable long-time heavy-load operation.

7. Get A Quote

Send inquiries for NU2205-EM cylindrical roller bearings used on electric motors, small gearboxes and industrial pumps.
Services after inquiry:

1. Standard quotation delivered within 24 working hours
2. Technical guidance for floating shaft layout and lubrication cycle arrangement
3. Upgrade options: P5 high precision grade, C3 loose clearance, high-temperature anti-oxidation synthetic grease
4. Competitive factory bulk unit price for large quantity orders

Please state order quantity, working load, rotating speed and site environment for complete quotation documents.