NTN BEARING 1204
NTN BEARING 1204
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Bore (inner diameter): 20 mm
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Outer diameter: 47 mm
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Width: 14 mm
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Type: Double-row, self-aligning ball bearing with cylindrical (straight) bore, open design (no seals)
PRODUCT DEFINITION
| Brand | SNR |
| d – Internal diameter | 20 mm |
| D – External diameter | 47 mm |
| B – Bearing/Inner ring width | 14 mm |
| d1 – External diameter inner ring | 29,2 mm |
| D1 – Inner diameter outer ring | 37,3 mm |
| rs – Min fillet radius | 1 mm |
| Radial clearance class | CN |
| Precision class | P0 |
| Mass | 0,117 kg |
PRODUCT PERFORMANCE
| C – Dynamic load | 9,7 kN |
| C0 – Static load | 2,6 kN |
| Cu – Fatigue limit load | 0,12 kN |
| e – Coefficient | 0.27 |
| Y0 – Static axial load coefficient | 2.41 |
| Y1 – Lower axial load coefficient | 2.31 |
| Y2 – Upper axial load coefficient | 3.57 |
| N ref – Reference thermal speed | 15000 tr/min |
| N lim – Mechanical Limit Speed | 21000 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) | 4,863 Hz |
| BPFI – Over rolling frequency on inner (60 rpm) | 7,137 Hz |
| BSF – Over rolling frequency on rolling element (60 rpm) | 5,004 Hz |
| BRF – Rotational frequency – rolling element (60 rpm) | 2,502 Hz |
| FTF – Rotational frequency – cage (60 rpm) | 0,405 Hz |

