21308C NTN 40x90x23mm da min. 48.5 mm Spherical roller bearings
| Bearing number | 21308C |
| Size (mm) | 40x90x23 |
| Brand | NTN |
| Bore Diameter (mm) | 40 |
| Outer Diameter (mm) | 90 |
| Width (mm) | 23 |
| d | 40 mm |
| D | 90 mm |
| B | 23 mm |
| C | 23 mm |
| r min. | 1.5 mm |
| da min. | 48.5 mm |
| Da max. | 81.5 mm |
| ra max. | 1.5 mm |
| Weight | 0.705 Kg |
| Basic dynamic load rating (C) | 88 kN |
| Basic static load rating (C0) | 90 kN |
| (Grease) Lubrication Speed | 4 900 r/min |
| (Oil) Lubrication Speed | 6 400 r/min |
| Calculation factor (e) | 0.26 |
| Calculation factor (Y0) | 2.5 |
| Calculation factor (Y1) | 2.55 |
| Category | Spherical Roller Bearings |
| BDI Inventory | 0.0 |
| Manufacturer Name | NTN |
| Minimum Buy Quantity | N/A |
| Weight / Kilogram | 0.72 |
| EAN | 4547359260069 |
| Product Group – BDI | B04311 |
| Internal Clearance | C0-Medium |
| Mounting Method | Shaft Mount |
| Rolling Element | Spherical Roller Bearing |
| Bore Profile | Straight |
| Cage Material | Steel |
| Enclosure | Open |
| Number of Rows of Rollers | Double Row |
| Relubricatable | No |
| Withdrawal Sleeve | Not Applicable |
| Withdrawal Nut | Not Applicable |
| Inch – Metric | Metric |
| Long Description | 40MM Straight Bore; 90MM Outside Diameter; 23MM Width; C0-Medium Clearance; Shaft Mount; Double Row of Spherical Roller Bearings; Steel Cage Material; Open Enclosure; Not Relubricatable |
| Category – BDI | Spherical Roller Bearing |
| UNSPSC | 31171510 |
| Harmonized Tariff Code | 84823080 |
| Noun | Bearing |
| Keyword String | Spherical |
| Manufacturer URL | http://www.ntnamerica.com |
| Weight / LBS | 1.591 |
| Bore | 1.575 Inch | 40 Millimeter |
| Outside Diameter | 3.543 Inch | 90 Millimeter |
| Adapter Part Number | Not Applicable Inch | Not Applicable Millimeter |
| Width | 0.906 Inch | 23 Millimeter |
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Detailed Parameters
parameter：
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| 635 Deep groove ball bearings | Size :5x19x6mm ，Brand:ZEN ，d:5 mm ，Bore Diameter :5mm ，Width :6mm ，Outer Diameter :19mm |
| AU0701-4LL/L588 Angular contact ball bearings | Width :37mm ，Bore Diameter :34mm ，Size :34x64x37mm ，Outer Diameter :64mm ，Brand:NTN ，d:34 mm |
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| 23964R Spherical roller bearings | Outer Diameter :440mm ，Bore Diameter :320mm ，Size :320x440x90mm ，Brand:KOYO ，Width :90mm ，d:320 mm |
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