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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
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1 in stock
Tapered roller bearing cone, 5.000 in bore, 1.8125 in cone width. Class 3 precision, case-carburized steel, stamped steel cage, mates a 67322 cup.
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| MFR / Brand | Timken |
|---|---|
| MPN | 67388W-3 |
| Model | 67388W *3 |
| Bearing Type | Tapered Roller Bearing Single Cone, Open |
| ID | 5.0000 in (127 mm) |
| OD | Not applicable (cone only) |
| Material | Case-carburized alloy steel |
|---|---|
| Series | 67300 |
| Base Number | 67388 |
| Industry Terms | cone, inner ring and roller assembly, taper bearing cone, Class 3 precision cone, 5 inch bore taper cone, precision tolerance cone |
| Bore Shaft Size | 5.0000 in (127 mm) |
| Mpn Variants | 67388W-3, 67388W3, 67388W *3, 67388W#3, 67388-W-3, 67388 W 3, 67388W, 67388 |
| Compatible With Replaces | Mating cup: Timken 67322 (7.75 in OD, 1.5000 in width) |
| Rolling Elements | Tapered rollers |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.20.00.00 |
| Part Number | 67388W-3 |
| Cone Part Number | 67388W-3 (base 67388) |
| Cone Width | 1.8125 in (46.04 mm) |
| Cone Backface To Clear Radius | 0.14 in |
| Cone Frontface Backing Diameter | 5.43 in |
| Effective Center Location | -0.25 in |
| Cross Reference 1 | Timken 67388 – standard tolerance, not Class 3 |
|---|---|
| Cross Reference 2 | Timken 67390 – different cone, same 67322 cup |
| Cross Reference 3 | Timken 67391 – different cone, same 67322 cup |
Brand: Timken. Manufacturer part number: 67388W *3. Product type: tapered roller bearing single cone. Series: 67300. Base number: 67388. Design units: imperial. A cone is the inner ring with its tapered rollers and cage. Cone only. The matching cup is the Timken 67322.
67388W *3 is a Class 3 precision cone. Class 3 is a Timken precision class above standard tolerance. Class 3 holds tighter bore, outside diameter and width tolerances and tighter running accuracy. Tighter running accuracy gives lower radial and axial runout, and lower runout gives less vibration and more repeatable preload once the bearing is set. Timken writes the same class three ways on inch tapers: 67388-W *3, 67388W#3 and 67388W-3.
Bore: 5.0000 in (127 mm). Cone width: 1.8125 in (46.04 mm). Bearing width across the assembled 67388/67322 pair: 1.8125 in. Mating cup 67322 outside diameter: 7.75 in. Mating cup 67322 width: 1.5000 in.
Material: case-carburized alloy steel with a ground raceway. Cage: one-piece stamped steel, roller-retaining. Closure: open. Bore form: straight. Rolling elements: tapered rollers. Number of rows: 1.
Cone backface to-clear radius: 0.14 in. Cone frontface backing diameter: 5.43 in. Effective centre location: –0.25 in, inside the cone backface. Internal clearance is set on mounting.
Class 3 precision cones run in machine tool spindles, printing presses and rolling mills.
Unit quantity: 1 Pc. Cone only. Matching cup: Timken 67322, giving a single-row TS bearing on a 5 in bore and a 7.75 in outside diameter.
Timken 67388 is the standard-tolerance cone on the same envelope and is a related size. Timken 67390 and Timken 67391 are related sizes that also run against a 67322 cup. Searchable forms of this designation: 67388W, 67388-W, 67388 W, 67388W3, 67388W#3, 67388W *3, Class 3, *3, #3.
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