LM361649A-610 bearing: complete specifications & equivalents
The LM361649A-610 is a ISO 355 radial bearing sized 343.154 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 | 343.154 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 A/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 | 13.51 in |
|---|---|
| Outer diameter D | 17.75 in |
| Width B | 2.625 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 53.8 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) | 2 of 2 |
| Bore above smallest LM361600-series size | 0.2540000000000191 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| LM361649A-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 LM361649A-610 model number is decoded
Within the LM361600-series tables, LM 361649 A appears in several rows because SKF lists multiple cup options for the same cone. LM361649A 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.SKF LM361649A (SKF LM 361649 A/610) is the LM361600-series tapered roller choice for a 343.154 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 450.85×66.675 mm envelope.Digit by digit, LM361649A reads as cone reference / cup reference in the LM361600-series inch series; the 343.154 mm bore, 450.85 mm OD and 66.675 mm width are the metric equivalents of the original inch boundary values. 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. With C 1000 kN and C0 2200 kN, the LM361649A 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. Because the contact line is tapered, one LM361649A reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 343.154 mm shaft typically takes a m6 seat with an H7 housing bore. Load system: the 1000 kN basic dynamic rating C and 2200 kN static rating C0 give a C0/C balance of 2.20, and dividing C by the 343.154 mm bore yields 2.91 kN per millimetre of journal — a density metric that compares across families; the 180 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 343.154 mm shaft carrying variable duty.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- 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
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- roller large-end smearing against the cone rib after EP lubricant film failure
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- At 343.154 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 343.154 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.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of LM361649A pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- Do not mix brands or executions inside one LM361649A 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.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- 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 LM361649A (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 361649 A/610 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Is LM361649A 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 LM361649A?
The SKF LM 361649 A/610 is a single-row tapered roller bearing with 343.154 mm bore, 450.85 mm outer diameter and 66.675 mm width (13.51 × 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.
How does the LM361649A inch-series designation work?
Inch-series tapered roller bearings use a Timken-style cone/cup convention: the number before the slash identifies the cone (inner ring with roller and cage assembly), the number after the slash identifies the cup (outer ring), and the LM361600-series code marks the dimensional series. The metric dimensions 343.154×450.85×66.675 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in LM361649A 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 (LM361600-series) groups sizes that share the same boundary-dimension plan.
Can a single LM361649A 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.
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.