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NA4824 is single row machined ring needle roller bearing assembled with a matched precision inner ring, consisting of outer ring, needle rollers, steel cage and separable inner ring as a complete unit. It features compact radial cross-section, ultra-high radial load capacity and excellent structural rigidity. The integrated inner ring eliminates special quenching and grinding processing on mating shafts, simplifying mechanical design and assembly steps, widely used for heavy radial load transmission structures with limited installation space.
Get formal quotation within 24 hours after sending your inquiry.
2. Technical Specifiions
Model
NA4824
Dimensions
Inner bore d120 mm, Outer D150 mm, Width B30 mm
Fw
130 mm
Net weight
0.94 kg
Dynamic load rating Cr
108 kN
Static load rating Cor
202 kN
Limiting speed
Grease lubriion 4300 rpm, Oil lubriion 5300 rpm
Structure
Single row needle rollers, complete with machined inner ring, oil groove on outer ring
Cage
Cold stamped steel cage
Material
GCr15 chrome bearing steel
Standard clearance
C0 normal clearance; C3 enlarged clearance optional
Separate inner ring part number
IR120×130×30
Complete load parameters and CAD drawings available upon request.
3. Core Advantages
Single row dense needle roller structure provides outstanding radial bearing capacity and rigidity for heavy load working conditions
Equipped with factory matched precision inner ring, no need for heat treatment and superfinishing on mating shaft surface
Outer ring with integrated lubriion groove ensures uniform grease distribution and convenient refueling maintenance
Compact wall thickness design saves radial installation space for miniaturized equipment layout
Tolerates slight axial displacement between shaft and housing during continuous operation
Standard metric dimensional specifiion, fully interchangeable with mainstream same-size needle roller bearings
Customizable options: double side rubber seals, high-temperature anti-oxidation grease, OEM laser marking, P6 / P5 precision grade Effectively reduce component wear, running vibration and long-term maintenance frequency of heavy machinery.
4. Appliion Scenarios
Heavy-duty industrial gearboxes, speed reducers and transmission cases
Hydraulic pumps, hydraulic cylinders and engineering valve components
Construction machinery, agricultural machinery main rotating shafts
Automation heavy-load conveying equipment and rotary fixtures
Printing, textile and packaging large roller transmission assemblies
General compact heavy radial load mechanical devices
5. Why Choose GQZ Bearing
25 years specialized manufacturer of machined needle roller bearings
Products exported to more than 50 countries worldwide
Strict full inspection of hardness, roundness, load capacity and rotational smoothness before delivery
24-hour professional technical support for bearing model matching and installation guidance
Sufficient bulk stock for gearbox, hydraulic and engineering machinery distributors
We supply stable quality, reliable heavy-load performance and long-term partnership support.
6. Quality Control Process
GCr15 raw material metallurgy and hardness inspection
Precision superfinishing grinding for inner ring and outer ring raceways
Needle roller size sorting and cage assembly tightness test
Full dimensional tolerance, static & dynamic load performance inspection
7. Request Quotation
If you need NA4824 complete inner ring needle roller bearings:
Send your inquiry to obtain:
Fast formal quotation within 24 hours
Professional 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 comes with matched inner ring; RNA series has no inner ring.
Q2: Exact dimension and separate inner ring model?
120×150×30mm, independent inner ring model: IR120×130×30.
Q3: What is the difference between NA and RNA bearings?
NA includes inner ring, can be mounted directly on ordinary shaft; RNA requires hardened ground shaft surface as raceway.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
1989
Total Annual:
1000000-10000000
Employee Number:
10~100
Ecer Certification:
Verified Supplier
Established in 1999, Wuxi Guangqiang Bearing Trade Co.,Ltd works hard in researching and manufacturing high quality bearings and rely on it's advantages of strong technologies, advanced equipment, professional technical team, quality production and reasonable prices has gain a broad... Established in 1999, Wuxi Guangqiang Bearing Trade Co.,Ltd works hard in researching and manufacturing high quality bearings and rely on it's advantages of strong technologies, advanced equipment, professional technical team, quality production and reasonable prices has gain a broad...