NA4907RS Needle Roller Bearing Specifications
Bore d (mm)
35
Outer D (mm)
55
Width B (mm)
21
Dynamic rating Cr (kN)
31
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 NA4907RS?
RAYSDE NA4907RS Needle Roller Bearing: bore d = 35 mm, outer diameter D = 55 mm, width/height B = 21 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RAYSDE NA4907RS carry?
Dynamic load rating Cr = 31 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 NA4907RS 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 NA4907RS replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 35 mm, OD 55 mm and width 21 mm match ISO dimensions, NA4907RS is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.