GQZ NJ5218 Single Row Cylindrical Roller Bearing 90×160×52.4mm For Industrial Gearbox And Heavy Machinery

NJ5218 is single row cylindrical roller bearing with one rib on inner ring and two ribs on outer ring. This NJ structure enables bearing to carry heavy radial load and limited one-way axial load. The inner ring, roller and cage assembly can be separated from outer ring, facilitating independent installation and maintenance. Widely used for industrial reducers, gearboxes, construction machinery and heavy transport transmission assemblies.

Formal quotation will be sent within 24 hours upon your inquiry.

Model: NJ5218

Dimensions: d90 mm, D160 mm, B52.4 mm

Net weight: approx 5.0 kg

Dynamic load rating Cr: 362 kN

Static load rating Cor: 415 kN

Limiting speed: Grease 3200 rpm, Oil 3900 rpm

Structure: Single row cylindrical roller, NJ type (inner ring single rib), separable inner assembly

Material: GCr15 bearing chrome steel; optional steel cage / brass machined cage (NJ5218M)

Clearance: Standard CN clearance; C3, C4 clearance available

Precision class: P0, P6, P5 optional

Complete dimension drawings and load data available on request.

1. NJ structural design: withstand heavy radial load and one-way axial positioning load
2. Separable inner roller assembly, convenient for mounting, disassembly and inspection
3. Optimized roller profile, uniform stress distribution, strong anti-fatigue performance
4. Low friction coefficient, stable running, less heat generation under continuous heavy load
5. Multiple cage options (stamped steel / brass cage) to satisfy different speed & temperature working conditions
6. Customizable options: OEM laser marking, special clearance, high-temperature heat treatment
   Effectively extend service life of gearbox and heavy machinery transmission systems.

• Industrial heavy-duty gearboxes and speed reducers
• Construction machinery, mining machinery transmission parts
• Steel mill equipment, metallurgical machinery supporting positions
• Heavy truck, engineering vehicle auxiliary transmission assemblies
• Large fan, pump and compressor main shaft supporting
• General mechanical equipment requiring high radial load and one-way axial location

25 years professional bearing manufacturer

Products exported to over 50 countries worldwide

Strict inspection on raw material hardness, surface finish, load capacity and rotational smoothness before delivery

24-hour professional technical support for clearance selection and installation guidance

Sufficient bulk stock for machinery and automotive distributors

We supply stable dimensional accuracy, reliable heavy-load performance and long-term cooperative support.

GCr15 raw material chemical composition and hardness inspection

Complete quenching & tempering heat stabilization treatment

Precision superfinishing grinding for rings and rollers

Cage forming and deburring processing

Full dimension tolerance, static & dynamic load and rotational performance testing

If you need NJ5218 cylindrical roller bearings:

Send inquiry to obtain below supports:

• Quick formal quotation within 24 hours
• Professional installation and clearance suggestion for various working scenarios
• Custom cage, clearance and marking solutions
• Competitive factory direct price
  Contact our sales team for full technical datasheets and formal offer.