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Tapered roller bearing cone, 2-1/8 in bore, 1.7230 in inner ring width, carburized steel. K factor 1.63, 237,000 N dynamic radial load rating, imperial.
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| MFR / Brand | Timken |
|---|---|
| MPN | 5578 |
| Model | 5578 |
| Bearing Type | Tapered Roller Bearing Cone |
| ID | 2.1250 in (53.975 mm) |
| Base Number | 5578 |
|---|---|
| Overall Width | 1.7230 in (43.764 mm) |
| Mpn Variants | 5578, 55-78, 55 78 |
| Compatible With Replaces | SKF 5578, FAG K-5578, NSK 5578, NTN 4T-5578, Koyo 5578, Fersa 5578, BCA/Bower 5578, PEER 5578 |
| Precision Class | Not specified |
| Dynamic Axial Rating Ca90 | 37,600 N |
| K Factor | 1.63 |
| Dynamic Load Rating | 237,000 N |
| Static Load Rating | 327,000 N |
| Precision Rating | Not specified |
| Series | 55 |
| Rolling Elements | Tapered Roller |
| Item Weight | 2.7 kg (5.9 lb) |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.20.00 |
| Cup Part Number | 5520, 5521 |
| Design Units | Imperial |
| Bearing Material | Carburized Steel |
| Cone Part Number | 5578 |
| Cone Width | 1.7230 in (43.764 mm) |
| Effective Center Location | -0.48 in (-12.2 mm) |
| Cross Reference 1 | SKF 5578 |
|---|---|
| Cross Reference 2 | FAG K-5578 |
| Cross Reference 3 | NSK 5578 |
| Cross Reference 4 | NTN 4T-5578 |
| Cross Reference 5 | Koyo 5578 |
| Cross Reference 6 | Fersa 5578 |
| Cross Reference 7 | BCA/Bower 5578 |
| Cross Reference 8 | PEER 5578 |
Timken 5578 single tapered roller bearing cone — the inner ring, roller and cage assembly of a TS-design tapered roller bearing. Bore (d): 2.1250 in (53.975 mm). Inner Ring Width (B): 1.7230 in (43.764 mm). Series: 55. Bearing Material: Carburized Steel. Design Units: Imperial.
5578 — the cone number, which fixes the bore, the cone width and the raceway angle.
Dynamic Radial Load Rating (C1, 1M revs): 237,000 N (53,200 lbf). Dynamic Radial Load Rating (C90, 90M revs): 61,300 N (13,800 lbf). Dynamic Axial Rating (Ca90): 37,600 N (8,460 lbf). Static Radial Load Rating (C0): 327,000 N (73,500 lbf). K Factor: 1.63. Geometry Factor (Cg): 0.0825. The 1.7230 in cone width is unusually deep for a 2.1250 in bore, and the 237,000 N dynamic rating follows from that long roller path. Item weight: 2.7 kg (5.9 lb).
Effective Center Location: –0.48 in (–12.2 mm), placing the effective centre inside the cone backface. Max Shaft Fillet Radius: 0.14 in (3.600 mm). Shaft Backing Shoulder Diameter – Frontface (da): 2.64 in (67 mm). Shaft Backing Shoulder Diameter – Backface (db): 2.87 in (73 mm). Cage Location relative to Backface (Aa): 0.07 in (1.8 mm). Cage Location relative to Frontface (Ab): 0.08 in (2 mm).
Cone only. The matching cups are the Timken 5520 and the Timken 5521. Unit Quantity: 1 Pc. Number Of Rows: 1. Rolling Elements: Tapered Roller.
The 5578 base number is carried across the trade: SKF 5578, FAG K-5578, NSK 5578, NTN 4T-5578, Koyo 5578, Fersa 5578, BCA/Bower 5578 and PEER 5578. Searchable forms of the designation: 5578, 55-78, 55 78.
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