 21308C NTN 40x90x23mm  da min. 48.5 mm Spherical roller bearings
  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 | 
 Detailed  Parameters
  Detailed  Parameters
                                     parameter:
  parameter:
                                        | 6210F604 Deep groove ball bearings | Bore Diameter :50.000mm ,Outer Diameter :90.000mm ,Size :50x90x20mm ,Brand:SNR | 
| K50X56X23 Needle roller bearings | Brand:Timken ,Bore Diameter :50mm ,Fw:50 mm ,Ew:56 mm ,Outer Diameter :56mm | 
| CR-6604 Tapered roller bearings | Size :330x460x52mm ,Width :52mm ,Outer Diameter :460mm ,Brand:NTN ,Bore Diameter :330mm | 
| 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 | 
| CX002R Wheel bearings | Designation SKF:VKBA 927 ,Brand:CX ,Designation SNR:R158.02 ,Designation FAG:713690110 | 
| 413034 Tapered roller bearings | Size :170x260x67mm ,Bore Diameter :170mm ,Brand:NTN ,Outer Diameter :260mm | 
| 23964R Spherical roller bearings | Outer Diameter :440mm ,Bore Diameter :320mm ,Size :320x440x90mm ,Brand:KOYO ,Width :90mm ,d:320 mm | 
| 130063X/130120P Tapered roller bearings | Brand:Gamet ,Size :63.5x120x65.44mm ,Bore Diameter :63.5mm ,Width :65.44mm ,Outer Diameter :120mm | 
| 1211ETN9 Self aligning ball bearings | Outer Diameter :100mm ,Size :55x100x21mm ,Brand:SKF ,Width :21mm ,Bore Diameter :55mm ,d:55 mm | 
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