LM245848-810 bearing: complete specifications & equivalents
The LM245848-810 is a ISO 355 radial bearing sized 231.775 x 317.5 x 47.625 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 231.775 mm |
| Outer diameter D | 317.5 mm |
| Width B | 47.625 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 556 kN |
| Basic static load rating C0 | 980 kN |
| Fatigue load limit Pu | 90 kN |
| Reference speed (thermal) | 1500 rpm |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10500 g |
| Manufacturer designation | SKF LM 245848/810 |
| 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 & LM245800-series range
| Bore d | 9.125 in |
|---|---|
| Outer diameter D | 12.5 in |
| Width B | 1.875 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 42.9 mm |
| Smallest bore in LM245800-series | 230.188 mm |
| Largest outer diameter in LM245800-series | 317.5 mm |
| Width range across LM245800-series | 47.625–47.625 mm |
| Bore position in LM245800-series (smallest first) | 2 of 2 |
| Bore above smallest LM245800-series size | 1.5870000000000175 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| LM245848-810 | 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 LM245848-810 model number is decoded
In SKF suffix language a bare LM245848 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. At 1,500 r/min reference speed the 42.9 mm-section LM245848 is governed thermally by preload and lubricant flow; grease or oil selection should be made against that value, with 1,800 r/min as the mechanical ceiling. For a 231.775 mm shaft the usual cone seat is m6 with an H7 housing when the inner ring rotates; arrange two LM245848 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Operating context for the 231.775 mm bore: a shaft of this diameter in the xl-bore band typically runs between 185420 and 278130 r/min in real machinery, and the 317.5 mm outside diameter places the housing shoulder at 326 mm outer abutment; the 47.625 mm width and 10500 g mass together set the shaft critical speed and the housing resonance check for this LM200-series envelope. Two catalogue entries share the LM 245848 cone but use different cups; this one, LM245848, takes the 810 cup and is ground for the resulting 317.5 mm OD / 47.625 mm width envelope. Selecting a sibling cup produces a different boundary plan and a different order number, so the full designation is required at purchase.SKF LM 245848/810 belongs to the SKF single-row tapered roller range — the 231.775 mm bore entry in the inch LM245800-series, dimensioned 317.5 mm OD and 47.625 mm wide.The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (LM245800-series) ties the pair to a specific boundary plan. Dimensions 231.775×317.5×47.625 mm are the converted metric envelope.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- large crusher and mineral-processing drives
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
- roller large-end smearing against the cone rib after EP lubricant film failure
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- At 231.775 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 LM245800-series inch series at 231.775 mm bore (317.5×47.625 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.
- At the 556 kN rating of LM245848, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 1,800 r/min speed end and heavier preload only where moment stiffness dominates.
- Setting is a design value, not an assembly feel: excessive preload in the LM245848 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- Never press both rings through the wrong element during fitting: force for an interference shaft seat goes through the cone only, or brinell marks on the 317.5 mm cup race release as noise within the first running hours.
- The 556/980 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 LM245848 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 245848/810 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What do the cone and cup numbers in LM245848 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 (LM245800-series) groups sizes that share the same boundary-dimension plan.
Can a single LM245848 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 LM245848 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 LM245848 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit LM245848?
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 47.625 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 LM245848 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.