1. Product Overview
NA4822 is single row machined needle roller bearing equipped with matched separable inner ring, consisting of outer ring, needle rollers and stamped steel cage as integrated assembly. Slim radial section brings great load capacity and high rigidity. The supporting inner ring avoids extra quenching and grinding processing on mating shafts, simplifying assembly design, suitable for heavy radial load machinery with limited mounting space.
Formal quotation will be sent within 24 hours upon your inquiry.
2. Technical Specifiions
| Parameter | Value |
|---|
| Model | NA4822 |
| Dimensions | d 110 mm, D 140 mm, B 30 mm |
| Roller diameter circle Fw | 120 mm |
| Net weight | 0.78 kg |
| Dynamic load Cr | 95.8 kN |
| Static load Cor | 176 kN |
| Limiting speed | Grease 4600 rpm, Oil 5700 rpm |
| Structure | Single row needle rollers, detachable inner ring, outer ring with lubriion groove |
| Cage | Cold stamped steel cage |
| Material | GCr15 bearing chrome steel |
| Clearance | Standard C0 clearance, C3 enlarged clearance optional |
| Separate inner ring model | IR110×120×30 |
Complete load data and CAD drawings available on request.
3. Core Advantages
- Dense single-row needle roller layout delivers outstanding radial load capacity and structural rigidity for heavy-duty operation
- Factory matched precision inner ring, no need for heat treatment and superfinishing on the mating shaft
- Outer ring with built-in oil groove ensures uniform grease distribution and easy supplementary lubriion
- Thin-wall compact design saves radial installation space for miniaturized equipment layout
- Allows slight axial displacement between shaft and housing during long-time continuous running
- Standard metric dimensions, fully interchangeable with same specifiion needle roller bearings
- Custom options: double-side rubber seals, high temperature grease, OEM laser marking, P6/P5 precision grade Reduce parts abrasion, running vibration and long-term maintenance frequency of heavy equipment.
4. Appliion Scenarios
- Heavy-duty gearboxes, speed reducers and transmission boxes
- Hydraulic pumps, hydraulic cylinders and engineering valve components
- Construction machinery, agricultural equipment rotary shafts
- Heavy load automation conveyors and rotary fixtures
- Printing, textile and packaging large roller transmission parts
- General compact machinery with heavy radial load demands
5. Why Choose GQZ Bearing
- 25 years professional manufacturer of machined needle roller bearings
- Products exported to over 50 countries worldwide
- Full strict inspection on hardness, roundness, load capacity and smooth rotation before delivery
- 24-hour technical support for model matching and installation guidance
- Sufficient bulk stock for gearbox, hydraulic and engineering machinery distributors
- We supply stable quality, durable heavy load performance and long-term cooperation support.
6. Quality Control Process
- GCr15 raw material metallurgy and hardness test
- Complete quenching & tempering heat stabilization treatment
- Superfinishing grinding for inner and outer ring raceways
- Needle roller sorting and cage assembly tightness inspection
- Full dimension tolerance, static and dynamic load performance test
7. Request Quotation
If you need NA4822 needle roller bearings with inner ring:
Send inquiry to get below supports:
- Quick formal quotation within 24 hours
- Clearance and lubricant matching suggestions
- Custom sealed structure and high temperature lubriion solutions
- Competitive factory direct price Contact our sales team for full technical datasheets and formal offer.
8. FAQ
Q1: What does NA stand for?
NA series needle roller bearing is equipped with matched inner ring; RNA series without inner ring.
Q2: Full dimension and separate inner ring model?
110×140×30mm; independent inner ring: IR110×120×30.
Q3: Difference between NA and RNA needle bearings?
NA with inner ring can be installed on common shafts directly; RNA requires hardened and ground shaft surface as rolling raceway.