NACHI LM11949/10 Inch Tapered Roller Bearing 17.463 x 45.237 x 15.494 mm, Cone and Cup
Available
The NACHI LM11949/10 is a single row inch series tapered roller bearing: cone LM11949 with cup LM11910. It measures 17.463 mm bore x 45.237 mm outer diameter x 15.494 mm overall width, with a basic dynamic load rating of 29.4 kN and a basic static load rating of 30.1 kN.
A tapered roller bearing carries combined radial and axial load. The cone (inner ring and roller assembly) and the cup (outer ring) are separable, and the internal clearance is set at mounting by the axial position of the cone relative to the cup. A single row bearing takes axial load in one direction, so for axial load both ways fit a pair, face-to-face or back-to-back.
The overall width of 15.494 mm is for the cone assembled with cup LM11910. The cone on its own is 16.637 mm wide and the cup is 12.065 mm wide.
Where this product is used
- Industrial gearboxes and speed reducers
- Wheel hubs, axles and vehicle drive trains
- Transmissions and differentials
- Conveyor drives and general industrial machinery
- Equipment with combined radial and axial loads on one shaft
Features
- Inch series single row tapered roller bearing: LM11949/10 is cone LM11949 with cup LM11910
- Carries combined radial and axial load; the cone and cup are separable and the clearance is set at mounting
- Basic dynamic load rating 29.4 kN and static rating 30.1 kN, with limiting speeds of 9,400 rpm on grease and 13,000 rpm on oil
- Inch-dimensioned series made to ABMA (ANSI) standards
Key specifications
| Specification | Detail |
|---|---|
| Model | LM11949/10 |
| Type | Single row tapered roller bearing, inch series |
| Cone | LM11949 |
| Cup | LM11910 |
| Bore d | 17.463 mm |
| Outer diameter D | 45.237 mm |
| Overall width T (cone with cup LM11910) | 15.494 mm |
| Cone width B | 16.637 mm |
| Cup width C | 12.065 mm |
| Basic dynamic load rating Cr | 29.4 kN (29,400 N) |
| Basic static load rating Cor | 30.1 kN (30,100 N) |
| Limiting speed, grease | 9,400 rpm |
| Limiting speed, oil | 13,000 rpm |
| Constant e / factors Y1, Y0 | 0.30 / 2.00 / 1.10 |
| Load centre a | 5.5 mm |
| Mass | 0.125 kg (cone 0.081, cup 0.044) |
| Shaft shoulder da (min) / db (max) | 25 / 23.5 mm |
| Housing shoulder Da (min) / Db (min) | 39.5 / 41.5 mm |
Selecting the right option
Inch series bearings are identified by their cone and cup numbers, so order and check both: this bearing is cone LM11949 with cup LM11910.
To work out the equivalent dynamic load Pr for a single bearing: where Fa/Fr is at or below e, Pr = Fr; above e, Pr = 0.4 x Fr + Y1 x Fa. For this bearing e is 0.30 and Y1 is 2.00.
Fitting and use
A radial load on a single row tapered roller bearing creates an induced axial load, Fa' = Fr / (2 x Y1), which tries to separate the cone and cup. It is normally balanced by mounting two bearings as a pair or as a multi-row set, so work out the axial load on each bearing, not just the one that carries the thrust.
The internal clearance is set when you mount the bearing, by the axial position of the cone against the cup. The bearing can also be preloaded for higher rigidity and running accuracy, but too much preload raises heat and shortens bearing life, so follow the equipment maker’s setting.
Limiting speeds are given for grease and for oil lubrication. Check the load and speed against the figures here and apply a suitable safety factor; contact AIMS if you want a second opinion before ordering.
Related products
Metric sizes are on the NACHI metric J tapered roller bearings page and the NACHI DJ tapered roller bearings page. The other inch series size is the NACHI LM48548/10. Other NACHI bearing types: NACHI single row angular contact ball bearings, NACHI spherical roller bearings and NACHI cylindrical roller bearings.
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