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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
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Tapered roller bearing cone, 2.2500 in bore, 0.8640 in width, Class 3 precision. Matching cups are the Timken 382 and 382A. Case-carburized steel.
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| MFR / Brand | Timken |
|---|---|
| MPN | 387W-3 |
| Model | 387 W #3 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 2.2500 in |
| Series | 385 |
|---|---|
| Harmonization Code | 8482.20.00 |
| Design Units | Imperial |
| Bearing Material | Case-carburized alloy steel |
| Cone Part Number | 387W |
| Cone Width | 0.8640 in |
| Cone Backface To Clear Radius | 0.09 in |
| Base Number | 387W |
| Overall Width | 0.8640 in |
| Mpn Variants | 387W-3; 387W*3; 387W#3; 387-W *3; 387W 3; 387W |
| Compatible With Replaces | Mating cups: Timken 382, Timken 382A |
| Precision Class | Class 3 |
| Dynamic Load Rating C1 | 108,000 N |
| Additional Attributes | K Factor: 1.65. Dynamic Axial Rating (Ca90): 16,900 N (3,810 lbf). Dynamic Radial Load Rating (C90): 28,000 N (6,280 lbf). Effective Center Location: -0.12 in (-3 mm). G1 Factor: 42. G2 Factor: 15.7. Geometry Factor (Cg): 0.0859. |
| Dynamic Load Rating | 108,000 N |
| Static Load Rating | 107,000 N |
| Precision Rating | Class 3 |
| Rolling Elements | Tapered Roller |
| Item Weight | 2.523 kg (5.56 lb) |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Industry Terms | tapered roller bearing cone; inch taper cone; single cone; TRB cone; Class 3 taper bearing |
| Common Misspellings | Timkin 387W-3; Timken 387 W3; Timken 387WA-3; Timken 387W3; Timken 387W-#3 |
| Application Types | Wheel hubs; gearboxes; industrial shafts carrying combined radial and thrust load; agricultural and construction equipment |
Timken 387W-3 single-row tapered roller bearing cone, inch design, series 385. Cone only; the matching cups are the Timken 382 and 382A. Unit Quantity: 1 Pc.
387 — the cone base number within the Timken 385 inch tapered roller series.
W — the cone execution, carrying a 2.2500 in bore and a 0.8640 in inner ring width.
-3 — Precision Class 3. Tighter tolerance than standard, giving lower running vibration and closer shaft location. Cartons write the same code as 387W *3 and 387W #3.
Bore Diameter: 2.2500 in (57.150 mm).
Overall Width: 0.8640 in (21.946 mm).
Dynamic Load Rating: 108,000 N (24,200 lbf) at one million revolutions.
Dynamic Radial Load Rating C90: 28,000 N (6,280 lbf) at ninety million revolutions.
Dynamic Axial Rating Ca90: 16,900 N (3,810 lbf) at ninety million revolutions.
Static Load Rating: 107,000 N (24,100 lbf).
K Factor: 1.65.
Item Weight: 2.523 kg (5.56 lb).
Precision Class: Class 3.
Rolling Elements: Tapered Roller.
Number Of Rows: 1.
Bore Type: Straight.
Bearing Material: Case-carburized alloy steel.
Design Units: Imperial.
Shaft Backing Shoulder Diameter, frontface (da): 2.44 in (62 mm).
Shaft Backing Shoulder Diameter, backface (db): 2.60 in (66 mm).
Max Shaft Fillet Radius: 0.09 in (2.3 mm).
Effective Center Location: -0.12 in (-3 mm), measured inside the cone backface.
Cage Location relative to backface (Aa): 0.03 in (0.8 mm).
Cage Location relative to frontface (Ab): 0.11 in (2.8 mm).
Mating cups: Timken 382 and Timken 382A. Searchable variants of the part number: 387W-3, 387W*3, 387W#3, 387-W *3, 387W 3.
CAD model and data sheet: available from Timken (cad.timken.com).
The Timken 382 and the Timken 382A.
Precision Class 3, written on cartons as 387W *3 or 387W #3.
Bore 2.2500 in (57.150 mm); inner ring width 0.8640 in (21.946 mm).
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