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HMI Panels and PLC Modules: What They Do and How to Match a Replacement
When an HMI panel goes dark or a PLC module stops communicating, the machine it
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Flanged inch tapered roller bearing cup, 5.3750 in outside diameter, 0.875 in width, Class 3. Flange locates the cup axially in a through-bored housing.
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| MFR / Brand | Timken |
|---|---|
| MPN | 493B-3 |
| GTIN | 053893043678 |
| Model | 493 B 3 |
| Bearing Type | Tapered Roller Bearing Cup |
| OD | 5.3750 in (136.525 mm) |
| Condition | New – Open box |
|---|---|
| Series | 495 |
| Base Number | 493B |
| Condition Note | Made In USA, Class 3 Precision, Grease Stains |
| Overall Width | 0.875 in (22.225 mm) |
| Flange Outer Diameter | 5.589 in |
| Mpn Variants | 493B-3; 493-B *3; 493B #3; 493B3; 493-B-3 |
| Compatible With Replaces | Mating cones: Timken 495S, Timken 497A |
| Precision Class | Class 3 |
| Additional Attributes | e Factor 0.44; K Factor 1.31; Y Factor 1.35; G1 293; G2 164; Cg 0.125; Flange OD (D1) 141.961 mm; Flange width (C2) 5.537 mm; Max housing fillet radius 3.30 mm; Da 131.83 mm |
| Rolling Elements | Tapered Roller |
| Item Weight | 1.70 kg (3.7 lb) |
| Number Of Rows | 1 |
| Harmonization Code | 8482.20.00 |
| Cup Part Number | 493B |
| Cup Width | 0.8750 in |
| Part Number | 493B-3 |
| Cross Reference 1 | Timken 493 – related size, unflanged cup, same 5.3750 in outside diameter and raceway |
|---|
Timken 493B-3 flanged inch tapered roller bearing cup. Bearing Type: Tapered roller bearing cup with an integral outer-ring flange. Series: 493. Base Number: 493B. Outside Diameter: 5.3750 in (136.525 mm). Overall Width: 0.875 in (22.225 mm). Outer Ring Flange Outside Diameter (D1): 5.5890 in (141.961 mm). Outer Ring Flange Width (C2): 0.2180 in (5.537 mm). Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 1.70 kg (3.7 lb).
493 — Timken base cup number, 5.3750 in outside diameter.
B — flanged execution. The flange raises the outside diameter to 5.5890 in over a 0.2180 in band at one end of the cup, so the cup seats against the face of a through-bored housing instead of against an internal shoulder.
*3 — Timken Precision Class 3. Tighter running and mounting tolerance than standard class, giving lower running vibration and closer location in the housing bore. The same class is written 493B-3, 493B *3 and 493B #3.
e Factor: 0.44. K Factor: 1.31. Y Factor: 1.35. G1 Factor: 293. G2 Factor: 164. Geometry Factor (Cg): 0.125. The e factor is the load ratio at which the rating calculation switches to its thrust-loaded form, and the Y factor converts thrust into equivalent radial load within it.
Maximum fillet radius on the mating housing: 3.30 mm (0.130 in). Housing Backing Shoulder Diameter, frontface (Da): 131.83 mm (5.19 in). The flange face sets the axial position, so the housing bore can run straight through.
Unit Quantity: 1 Pc. Cup only. Matching cones are the Timken 495S and 497A.
The flanged 493B is a Timken execution. The plain 493 cup shares the 5.3750 in outside diameter and raceway and is built by several makers, but it locates on a housing shoulder rather than on a flange face, so it is a related size rather than a drop-in interchange for a flanged seat. For a flanged 5.3750 in seat, Timken is the source.
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