18790/18721 Bore 50.8 Mm, 18700 Series, Tapered Roller Bearings Single Row - TS Type Imperial
The 18790/18721 Imperial single-row tapered roller bearings are suitable for applications requiring combined loads and easy installation and maintenance. Classic applications include automotive wheel hubs and axles, industrial gearboxes, agricultural machinery, conveyor rollers, mining equipment, and machine tool spindles.
The 18790/18721 bearing is a Tapered Roller Bearings Single Row - TS type Imperial with an inner diameter of 50.8 mm , an outer diameter of 83.312 mm, a width of 17.463 mm. GCr15 / SAE 52100 / 20CrNiMoA rings, GCr15 / SAE 52100 rolling mlement. Its dynamic axial rated load is approximately 2202 N, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
18790/18721 bearings ( 50.8 mm x 83.312 mm x 17.463 mm) have the advantages of Simultaneously withstands combined loads (radial and axial loads) and is detachable for installation, and are therefore widely used in the Automotive wheel hubs, axles, transmissions, industrial gearboxes, and machine tool spindles.
| Part Number | 18790/18721 |
| Type | TS = Single-row (pressed steel and pin-type) |
| Manufacturer Part Code | 18790-18721 |
| Reference From | TIMKEN 18790/18721 |
| Inner ring (cone) | 18790 |
| Outer ring (cup) | 18721 |
| Series | 18700 |
| Bearing Type | Tapered Roller Bearings Single Row - TS type Imperial |
| Units | Inch |
| Rows NO. | Single row |
| Cage Material | Sheet metal |
| Temperature - T(min) [°C] | -30 |
| Temperature - T(max) [°C] | 110 |
| C1 Dynamic Radial [lbf] | 12330 |
| Ca90 Dynamic Axial [lbf] | 2202 |
| C90 Dynamic Radial [lbf] | 3197 |
| C0 Static Radial [lbf] | 15240 |
| Dimensions | |
| d φ Inside [inch] | 2 |
| D Φ Outside [inch] | 3.28 |
| T thickness [inch] | 0.6875 |
| B Cone Width [inch] | 0.6875 |
| C Cup Width [inch] | 0.5313 |
| a Effective center [inch] | -0.03 |
| r Fillet Radius (Housing) [inch] | 0.03 |
| R Fillet Radius (Shaft) [inch] | 0.14 |
| Ab [inch] | 0.09 |
| Aa [inch] | 0.02 |
| da Dia.(Shaft) [inch] | 2.2 |
| db Dia.(Shaft) [inch] | 2.44 |
| Da Dia.(Housing) [inch] | 3.13 |
| Db Dia.(Housing) [inch] | 3.03 |
| Coefficient | |
| e | 0.41 |
| Y | 1.48 |
| K | 1.44 |
| G1 Geometry (Roller-Raceway) | 28.6 |
| G2 Geometry (Rib-Roller End) | 21.5 |
| Cg Geometry | 0.0789 |
The 18790/18721 Imperial single-row tapered roller bearings mainly consist of an outer ring, inner ring, tapered rollers, and a cage. The outer and inner ring assemblies are separable for easy installation and adjustment. The rollers make line contact with the raceways. The cage is typically made of stamped steel or brass.
Imperial single-row tapered roller bearings can simultaneously withstand radial and unidirectional axial loads, exhibiting high load-bearing capacity and rigidity. Their separable structure facilitates clearance adjustment and preload control, resulting in a high limiting speed. They conform to imperial standard dimensions and offer excellent interchangeability.
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