LM241148-110 bearing: complete specifications & equivalents
The LM241148-110 is a ISO 355 radial bearing sized 203.987 x 276.225 x 42.862 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 203.987 mm |
| Outer diameter D | 276.225 mm |
| Width B | 42.862 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 478 kN |
| Basic static load rating C0 | 780 kN |
| Fatigue load limit Pu | 72 kN |
| Reference speed (thermal) | 1700 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7200 g |
| Manufacturer designation | SKF LM 241148/110 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & LM241100-series range
| Bore d | 8.031 in |
|---|---|
| Outer diameter D | 10.875 in |
| Width B | 1.687 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 36.1 mm |
| Smallest bore in LM241100-series | 200.025 mm |
| Largest outer diameter in LM241100-series | 276.225 mm |
| Width range across LM241100-series | 42.862–42.862 mm |
| Bore position in LM241100-series (smallest first) | 2 of 2 |
| Bore above smallest LM241100-series size | 3.961999999999989 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| LM241148-110 | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the LM241148-110 model number is decoded
In SKF suffix language a bare LM241148 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Selection arithmetic: the C0/C ratio is about 1.63 (static 780 kN against dynamic 478 kN), typical of a tapered roller sized for axial capacity, and the 72 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Because the contact line is tapered, one LM241148 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 203.987 mm shaft typically takes a m6 seat with an H7 housing bore. Operating context for the 203.987 mm bore: a shaft of this diameter in the xl-bore band typically runs between 163190 and 244784 r/min in real machinery, and the 276.225 mm outside diameter places the housing shoulder at 284 mm outer abutment; the 42.862 mm width and 7200 g mass together set the shaft critical speed and the housing resonance check for this LM200-series envelope. Housing and abutment design flows from the cup: in LM241148 the 110 cup fixes the 276.225 mm OD, the outer-ring face position and the rib shoulder that the rollers contact under thrust, while the LM 241148 cone determines the 203.987 mm shaft interface; the 42.862 mm width is the assembled pair value.In SKF catalogue PUB BU/P1 17000, LM241148 appears as SKF LM 241148/110: an open, single-row tapered roller bearing in the LM241100-series, supplied with a pressed-steel cage as standard.In SKF inch-series tables LM241148 sits at 203.987 mm bore (8.031 in) with a 276.225 mm cup OD and 42.862 mm total width — dimensions that trace back to the original Timken boundary plan for the LM241100-series family.
Typical equipment & failure modes
Common applications
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- wind-turbine main shafts
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- At 203.987 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
- The LM241100-series inch series at 203.987 mm bore (276.225×42.862 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common LM241148 mounting error.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the LM241148 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- The LM241148 shares its ISO 355 envelope with other tapered bearings of the same code but is not a drop-in replacement for a ball bearing: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
- The 478/780 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of LM241148 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 241148/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What do the cone and cup numbers in LM241148 mean?
The cone number (before the slash) identifies the inner ring, rollers and cage; the cup number (after the slash) identifies the outer ring. Both are quoted together because a single-row tapered roller bearing is a matched separable pair — the cone and cup are ground to work together and are not interchangeable with arbitrary other parts. The series prefix (LM241100-series) groups sizes that share the same boundary-dimension plan.
Can a single LM241148 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
How does LM241148 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load LM241148 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit LM241148?
For a rotating shaft under normal load, seat the cone on a m6 shaft fit; the cup is usually a loose-to-transition fit in the housing so it can creep slightly and distribute wear. Chamfer and shoulder diameters must clear the bearing rings so the 42.862 mm-wide cup seats square; the mounting setting (end play or preload) is set by the axial position of the cup relative to the cone.
Is LM241148 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.