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Tapered roller bearing cup, 7-9/16 in outside diameter, inch series, Class 3 precision. Cup only. 1 Pc.
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| MFR / Brand | Timken |
|---|---|
| MPN | L630310-3 |
| Model | L-630310 3 |
| Bearing Type | Tapered Roller Bearing Cup |
| OD | 7.5625 in |
| Width | 0.7480 in |
| Condition | New – Open box |
|---|---|
| Base Number | L630310 |
| Industry Terms | Taper roller cup; tapered roller bearing outer race; bearing race; Class 3 taper cup; inch series taper bearing |
| Common Misspellings | L630310 3; L-630310-3; Timkin L630310-3; L63031O-3 |
| Application Types | Large gearbox and pinion shafts; industrial trunnions; heavy axles; rolling mill and machine tool arrangements requiring Class 3 accuracy |
| Total Width | 0.9843 in (25.001 mm) assembled across the L630349/L630310 pairing |
| Condition Note | Made In USA, Super Precision Class 3 |
| Mpn Variants | L630310-3; L630310*3; L630310#3; L 630310 *3; L630310 |
| Compatible With Replaces | Mating cone: Timken L630349 (6 in bore), sold separately |
| Precision Class | Timken Class 3 |
| Additional Attributes | Made in USA. Cup half only; mating cone number and assembled dimensions verified against the Timken catalogue and distributor data. |
| Number Of Rows | 1 |
| Design Units | Inch |
| Bearing Material | Case-carburised bearing steel |
| Part Number | L630310-3 |
| Cross Reference 1 | L630349/L630310 (complete cone and cup pairing) |
|---|---|
| Cross Reference 2 | L630310 (standard precision counterpart) |
A tapered roller bearing cup in the Timken inch series: the outer race only, without rollers. Outside diameter 7-9/16 in (7.5625 in, 192.088 mm).
L630310 — the cup number in the L630349/L630310 pairing.
-3, also written *3 or #3 — Timken precision Class 3, a tighter tolerance grade than standard.
1 Pc. Cup only, no rollers. The matching cone is the Timken L630349, which has a 6 in bore.
The cup is the outer race of a separable tapered roller bearing; the cone half carries the inner raceway, the rollers and the cage. The raceway angle and roller path are matched between the two halves of a published pairing, which is what makes the cup and cone numbers a set. Class 3 tightens the bore, outside diameter and raceway running tolerances relative to a standard cup, which reduces runout in the assembled bearing and makes the setting of endplay more repeatable across a batch.
The cup seats in the housing bore, normally to an interference or line fit, and it is pressed square against the shoulder before endplay is set. Assembled width across the L630349/L630310 pairing is 0.9843 in.
This is the cup half of the Timken L630349/L630310 pairing. A standard-precision L630310 without the Class 3 suffix is the same envelope at a looser tolerance grade, so it is a related size rather than an interchange where the Class 3 grade is required.
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