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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
Availability:
35 in stock
Tapered roller bearing cup, 4.330 in (110 mm) outside diameter, 0.75 in width. Class 3 precision, e factor 0.46, Y factor 1.31.
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| MFR / Brand | Timken |
|---|---|
| MPN | 29521-3 |
| Model | 29521 #3 |
| Bearing Type | Tapered Roller Bearing Cup |
| OD | 4.3307 in (110 mm) |
| Condition | New – Open box |
|---|---|
| Series | 29500 |
| Base Number | 29521 |
| Industry Terms | Taper bearing cup; tapered roller bearing race; outer race; TS cup; Class 3 precision cup |
| Common Misspellings | Timkin 29521-3; 29512-3; tappered roller bearing cup; taper roler race |
| Total Width | 0.7500 in (19.050 mm) |
| Condition Note | Made In USA, Class 3 Precision, New Old Stock |
| Overall Width | 0.7500 in (19.050 mm) |
| Mpn Variants | 29521-3; 29521 *3; 29521 #3; 295213; 29521 |
| Compatible With Replaces | Mating cones: Timken 29580, Timken 29582 |
| Precision Class | Class 3 |
| E Factor | 0.46 |
| Additional Attributes | e Factor 0.46; Y Factor 1.31; Cg 0.111; Max housing fillet radius 1.27 mm; Da 103.90 mm; Db 99.06 mm |
| Rolling Elements | Tapered Roller |
| Item Weight | 0.9 kg (2 lb) |
| Number Of Rows | 1 |
| Cup Part Number | 29521-3 |
| Design Units | Imperial |
| Bearing Material | High Alloy Steel |
| Cup Width | 0.7500 in (19.050 mm) |
| Cup Backface To Clear Radius | 0.05 in |
| Part Number | 29521-3 |
| Cup Frontface Backing Diameter | 4.11" |
| Cross Reference 1 | Koyo 29521 |
|---|---|
| Cross Reference 2 | NTN 4T-29521 |
| Cross Reference 3 | NSK 29521 |
| Cross Reference 4 | SKF 29521 |
| Cross Reference 5 | BCA / Bower 29521 |
Timken 29521-3 inch tapered roller bearing cup. Bearing Type: Tapered roller bearing cup — the outer race of a single-row tapered roller bearing. Series: 29500. Base Number: 29521. Outside Diameter: 4.3307 in (110 mm). Overall Width: 0.7500 in (19.050 mm). Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 0.9 kg (2 lb).
29521 — Timken base cup number in the 29500 inch series, 4.3307 in outside diameter. The outside diameter is exactly 110 mm, so this cup drops into a metric housing bore as well as an inch one.
*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 29521-3, 29521 *3 and 29521 #3.
e Factor: 0.46. Y Factor: 1.31. Geometry Factor (Cg): 0.111. The e factor is the thrust-to-radial load ratio at which the rating calculation changes to its thrust-loaded form, and the Y factor converts thrust into equivalent radial load within it.
Maximum fillet radius on the mating housing: 1.27 mm (0.050 in). Housing Backing Shoulder Diameter, frontface (Da): 103.90 mm (4.11 in). Housing Backing Shoulder Diameter, backface (Db): 99.06 mm (3.90 in).
Unit Quantity: 1 Pc. Cup only. Matching cones are the Timken 29580 and 29582.
29521 is an industry-standard inch tapered roller bearing cup number. Koyo, NTN, NSK, SKF and BCA/Bower all build a 29521 to the same boundary dimensions, and all interchange with this cup. Precision Class 3 is a Timken tolerance grade; a standard-class 29521 from any maker fits the same envelope but holds a wider tolerance band.
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