K21X25X13 Needle Roller Bearing Specifications
Bore d (mm)
21
Outer D (mm)
25
Width B (mm)
13
Dynamic rating Cr (kN)
10.1
Static rating Cor (kN)
15.1
Grease limit speed (r/min)
12300
Oil limit speed (r/min)
20900
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST K21X25X13?
RUIST K21X25X13 Needle Roller Bearing: bore d = 21 mm, outer diameter D = 25 mm, width/height B = 13 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST K21X25X13 carry?
Dynamic load rating Cr = 10.1 kN and static load rating Cor = 15.1 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST K21X25X13 typically used?
Needle Roller Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST K21X25X13 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 21 mm, OD 25 mm and width 13 mm match ISO dimensions, K21X25X13 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.