Bangkok Belt & Industry Centre Sdn. Bhd. (246665-W)
NTN BEARING 1211
NTN BEARING 1211
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Type: Double-row self-aligning ball bearing with cylindrical (straight) bore.
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Dimensions: Bore (d) = 55 mm, Outer Diameter (D) = 100 mm, Width (B) = 21 mm.
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PRODUCT DEFINITION
| Brand | SNR |
| d – Internal diameter | 55 mm |
| D – External diameter | 100 mm |
| B – Bearing/Inner ring width | 21 mm |
| d1 – External diameter inner ring | 70,3 mm |
| D1 – Inner diameter outer ring | 86,1 mm |
| rs – Min fillet radius | 1,5 mm |
| Radial clearance class | CN |
| Precision class | P0 |
| Mass | 0,697 kg |
PRODUCT PERFORMANCE
| C – Dynamic load | 26,5 kN |
| C0 – Static load | 10 kN |
| Cu – Fatigue limit load | 0,45 kN |
| e – Coefficient | 0.2 |
| Y0 – Static axial load coefficient | 3.38 |
| Y1 – Lower axial load coefficient | 3.23 |
| Y2 – Upper axial load coefficient | 5 |
| N ref – Reference thermal speed | 6900 tr/min |
| N lim – Mechanical Limit Speed | 8800 tr/min |
| Tmin – Min operating temperature | -40 °C |
| Tmax – Max operating temperature | 120 °C |
BEARING FREQUENCIES
| BPFO – Over rolling frequency on outer ring (60 rpm) | 8,248 Hz |
| BPFI – Over rolling frequency on inner (60 rpm) | 10,752 Hz |
| BSF – Over rolling frequency on rolling element (60 rpm) | 7,393 Hz |
| BRF – Rotational frequency – rolling element (60 rpm) | 3,697 Hz |
| FTF – Rotational frequency – cage (60 rpm) | 0,434 Hz |
