NA4838 Needle Roller Bearing Specifications
Bore d (mm)
190
Outer D (mm)
240
Width B (mm)
50
Dynamic rating Cr (kN)
220
Static rating Cor (kN)
—
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RAYSDE NA4838?
RAYSDE NA4838 Needle Roller Bearing: bore d = 190 mm, outer diameter D = 240 mm, width/height B = 50 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RAYSDE NA4838 carry?
Dynamic load rating Cr = 220 kN and static load rating Cor = — kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RAYSDE NA4838 typically used?
Needle Roller Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RAYSDE NA4838 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 190 mm, OD 240 mm and width 50 mm match ISO dimensions, NA4838 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.