639 Deep Groove Ball Bearing Specifications
Bore d (mm)
9
Outer D (mm)
30
Width B (mm)
10
Dynamic rating Cr (kN)
5.6
Static rating Cor (kN)
2.39
Grease limit speed (r/min)
24000
Oil limit speed (r/min)
30000
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 639?
RUIST 639 Deep Groove Ball Bearing: bore d = 9 mm, outer diameter D = 30 mm, width/height B = 10 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 639 carry?
Dynamic load rating Cr = 5.6 kN and static load rating Cor = 2.39 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 639 typically used?
Deep Groove Ball Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 639 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 9 mm, OD 30 mm and width 10 mm match ISO dimensions, 639 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.