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Gearmotors: What They Are and How to Size a Replacement
Many industrial loads need torque an electric motor can’t deliver on its own, at a
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15 in stock
Timken 390-3 imperial tapered roller bearing cone only, 2.25 in (57.150 mm) bore, 0.866 in cone width, Class 3 precision, matching cup 394A, 1 Pc.
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| MFR / Brand | Timken |
|---|---|
| MPN | 390-3 |
| Model | 390 3 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 2.2500 in |
| Series | 390 / 394A imperial TS |
|---|---|
| Base Number | 390 |
| Industry Terms | taper roller cone, tapered roller inner race, TS cone, single cone |
| Common Misspellings | Timkin 390, Timpken 390, taper rollar bearing cone |
| Application Types | Gearboxes, pump shafts, industrial machinery, wheel and axle assemblies |
| Bore Shaft Size | 2.2500 in (57.150 mm) |
| Mpn Variants | 390-3, 390*3, 390 3, 3903, 390 |
| Compatible With Replaces | Mates with Timken 394A cup; assembled set 390/394A |
| Precision Class | Class 3 |
| Additional Attributes | Geometry factor Cg 0.0984; shaft backing shoulder diameter frontface (da) 66 mm; backface (db) 70 mm; max shaft fillet radius 2.3 mm |
| Number Of Rows | 1 |
| Harmonization Code | 8482.20.00 |
| Part Number | 390-3 |
| Cone Part Number | 390 |
| Cone Width | 0.8660 in |
| Cone Backface To Clear Radius | 0.09 in |
| K Factor | 1.45 |
| Effective Center Location | -0.8 mm |
Timken 390-3 imperial single-row tapered roller bearing cone: the inner ring with its tapered rollers and cage. Cone only. Unit Quantity: 1 Pc. Matching cup: Timken 394A.
390 — Timken base cone number, 2.2500 in bore.
-3 — Timken Precision Class 3, also written *3 and 390 3.
Bearing Type: Tapered roller bearing cone. Base Number: 390. Bore Diameter: 2.2500 in (57.150 mm). Cone Width: 0.8660 in (21.996 mm). Precision Class: Class 3. Rolling Elements: Tapered Roller. Number Of Rows: 1. K Factor: 1.45. G1 Factor: 56. G2 Factor: 21.4. Geometry Factor (Cg): 0.0984. Effective Center Location: -0.8 mm (inside the cone backface).
Maximum Shaft Fillet Radius cleared by the cone corners: 2.3 mm (0.09 in). Shaft Backing Shoulder Diameter, frontface (da): 66 mm (2.6 in). Shaft Backing Shoulder Diameter, backface (db): 70 mm (2.76 in).
Matching cup: Timken 394A. The assembled 390/394A set measures 2.2500 in bore, 4.3307 in outside diameter and 0.8661 in width (57.150 x 110.000 x 22.00 mm); the 394A cup width is 0.7411 in (18.82 mm). Timken also lists cups 393 and 393A as related products for the 390 cone. CAD model and data sheet: available from Timken.
The matching cup is the Timken 394A. This listing is the cone only (Unit Quantity: 1 Pc).
-3 is Timken Precision Class 3, also written *3 and 390 3.
Bore Diameter: 2.2500 in (57.150 mm). Cone Width: 0.8660 in (21.996 mm).
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Our team can locate, cross-reference, and source all parts.
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