LM361649-610 bearing: complete specifications & equivalents
The LM361649-610 is a ISO 355 radial bearing sized 342.9 x 450.85 x 66.675 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 342.9 mm |
| Outer diameter D | 450.85 mm |
| Width B | 66.675 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1000 kN |
| Basic static load rating C0 | 2200 kN |
| Fatigue load limit Pu | 180 kN |
| Reference speed (thermal) | 900 rpm |
| Limiting speed (mechanical) | 1200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 28000 g |
| Manufacturer designation | SKF LM 361649/610 |
| 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 & LM361600-series range
| Bore d | 13.5 in |
|---|---|
| Outer diameter D | 17.75 in |
| Width B | 2.625 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 54 mm |
| Smallest bore in LM361600-series | 342.9 mm |
| Largest outer diameter in LM361600-series | 450.85 mm |
| Width range across LM361600-series | 66.675–66.675 mm |
| Bore position in LM361600-series (smallest first) | 1 of 2 |
| Bore above smallest LM361600-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| LM361649-610 | 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 LM361649-610 model number is decoded
With C 1000 kN and C0 2200 kN, the LM361649 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 1,200 r/min. Specify pairs rather than single units wherever thrust reverses: the tapered contact of LM361649 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Operating context for the 342.9 mm bore: a shaft of this diameter in the xl-bore band typically runs between 274320 and 411480 r/min in real machinery, and the 450.85 mm outside diameter places the housing shoulder at 459 mm outer abutment; the 66.675 mm width and 28000 g mass together set the shaft critical speed and the housing resonance check for this LM300-series envelope. Within the LM361600-series tables, LM 361649 appears in several rows because SKF lists multiple cup options for the same cone. LM361649 is the 610 variant, with 450.85 mm OD and 66.675 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.In SKF catalogue PUB BU/P1 17000, LM361649 appears as SKF LM 361649/610: an open, single-row tapered roller bearing in the LM361600-series, supplied with a pressed-steel cage as standard.Reading the designation: LM361649 follows the Timken-style inch convention — the cone (inner ring with rollers) and cup (outer ring) are quoted as a pair separated by a slash, and the LM361600-series code identifies the dimensional series. The 342.9 mm bore, 450.85 mm OD and 66.675 mm width are the metric equivalents of the inch boundary dimensions. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. ); it is the dimensional series, not a separate part number.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- rolling-mill roll-neck bearings
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
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- At 342.9 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 LM361600-series inch series at 342.9 mm bore (450.85×66.675 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.
- Do not mix brands or executions inside one LM361649 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
- At the 1000 kN rating of LM361649, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 1,200 r/min speed end and heavier preload only where moment stiffness dominates.
- Catalogue reference speed and limiting speed are different limits: the 900 r/min reference is a thermal criterion under load, while the 1,200 r/min limiting value is the mechanical ceiling — observe both.
- The 1000/2200 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 LM361649 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 361649/610 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single LM361649 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 LM361649 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 LM361649 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit LM361649?
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 66.675 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 LM361649 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.
What are the dimensions and catalogue data of LM361649?
The SKF LM 361649/610 is a single-row tapered roller bearing with 342.9 mm bore, 450.85 mm outer diameter and 66.675 mm width (13.5 × 17.75 × 2.625 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1000 kN, C0 2200 kN, fatigue load limit Pu 180 kN, reference speed 900 r/min, limiting speed 1,200 r/min, mass about 28000 g. It is an open, separable bearing with a pressed-steel cage.
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.