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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
13 in stock
Tapered roller bearing cone, 4.8750 in bore, 1.5000 in width, K factor 1.91, Timken Class 3 precision, stamped steel cage, case-carburized steel.
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| MFR / Brand | Timken |
|---|---|
| MPN | 48286-3 |
| Model | 48286 *3 |
| Bearing Type | Tapered Roller Bearing Cone (single cone, component only) |
| ID | 4.8750 in |
| Series | 48200 imperial single-cone series |
|---|---|
| Base Number | 48286 |
| Industry Terms | Taper bearing cone; inner ring and roller assembly; single cone; TS tapered single cone; Class 3 tapered roller cone |
| Common Misspellings | 48286 3; 4828-63; 48826-3; 48286-S; Timkin 48286 |
| Application Types | Gearboxes; axles and wheel ends; pinion shafts; heavy construction and mining drivelines; industrial reducers |
| Bore Shaft Size | 4.8750 in (123.825 mm) |
| Mpn Variants | 48286-3; 48286 *3; 48286*3; 48286#3; 48286 3; 48286 |
| Compatible With Replaces | Matching cup: Timken 48220. Flanged cup version: Timken 48220-B |
| Material | Case-carburized steel |
| Rolling Elements | Tapered roller |
| Type | Tapered Roller Bearing Cone |
| Number Of Rows | 1 |
| Harmonization Code | 8482.20.00 |
| Part Number | 48286-3 |
| Cone Part Number | 48286-3 |
| Cone Width | 1.5000 in (38.100 mm) inner ring width B |
| Cone Backface To Clear Radius | 0.14 in (3.600 mm) max shaft fillet radius |
| Cone Frontface Backing Diameter | 5.24 in (133 mm) da frontface; 5.47 in (139 mm) db backface |
| Cage Cone Frontface Clearance | 0.15 in (3.8 mm) |
| Cage Cone Backface Clearance | 0.06 in (1.5 mm) |
| Effective Center Location | -0.22 in (-5.6 mm), inside cone backface |
| Cross Reference 6 | 48286/48220DC (related, TDO double-cup assembly) |
|---|
Timken 48286-3 tapered roller bearing cone: the inner ring with its roller and cage assembly. Bore 4.8750 in (123.825 mm), inner ring width 1.5000 in (38.100 mm), stamped steel cage, case-carburized steel. The matching cup is the Timken 48220.
48286 is the cone number in the Timken 48200 imperial series. The suffix marked on the carton as 48286 *3 is Timken precision Class 3, which holds tighter bore and running accuracy tolerances than standard Class 4 product.
The figures below are cone values. K factor is 1.91, the ratio of radial to thrust capability. Dynamic radial rating is 60,200 lbf on the ISO one-million-revolution basis and 15,600 lbf on the Timken ninety-million-revolution basis; dynamic axial rating is 8,160 lbf and static radial rating 111,000 lbf. Effective centre location is –0.22 in, inside the cone backface, which is the point through which the radial load acts when calculating bearing spacing.
Cone only, one piece. The matching cup is the Timken 48220, and the flanged version of that cup is the 48220-B. Cone weight 16.04 lb.
Shaft backing shoulder diameter is 5.24 in at the frontface and 5.47 in at the backface. Maximum shaft fillet radius that the cone corners clear is 0.14 in. Cage location relative to the backface is 0.06 in and relative to the frontface 0.15 in.
Tapered roller bearings mount in opposing pairs, and the setting is established at assembly by adjusting the axial position of one row against the other. The lubrication life adjustment geometry factor Cg is 0.114, with G1 of 353 and G2 of 91.3.
The 48286 cone runs against the 48220 cup, and against the 48220-B where a flanged cup is wanted. The 48282 is a related size sharing the 48220 cup with a different cone width.
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