L327249-210 bearing: complete specifications & equivalents
The L327249-210 is a ISO 355 radial bearing sized 133.35 x 177.008 x 25.4 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 133.35 mm |
| Outer diameter D | 177.008 mm |
| Width B | 25.4 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 166 kN |
| Basic static load rating C0 | 280 kN |
| Fatigue load limit Pu | 28 kN |
| Reference speed (thermal) | 2600 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1700 g |
| Manufacturer designation | SKF L 327249/210 |
| 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 & L327200-series range
| Bore d | 5.25 in |
|---|---|
| Outer diameter D | 6.969 in |
| Width B | 1 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 21.8 mm |
| Smallest bore in L327200-series | 133.35 mm |
| Largest outer diameter in L327200-series | 177.008 mm |
| Width range across L327200-series | 25.4–25.4 mm |
| Bore position in L327200-series (smallest first) | 1 of 1 |
| Bore above smallest L327200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| L327249-L327210 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 133.35×177.008×25.4 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| L327249-210 | 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 L327249-210 model number is decoded
Catalogue mass 1700 g for the 133.35×177.008×25.4 mm open execution covers the pressed-steel cage and standard roller complement; sealed or special-clearance variants differ slightly in mass and carry their own order numbers. For a 133.35 mm shaft the usual cone seat is m6 with an H7 housing when the inner ring rotates; arrange two L327249 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Speed envelope and thermal behaviour: at 2,600 r/min thermal reference, the 133.35 mm bore shaft runs at a dn of 347k, and the 21.8 mm section dissipates heat through the cup-to-housing contact path; the 3,200 r/min mechanical ceiling reflects cage strength, and the 1700 g spinning cone contributes gyroscopic moment under rapid speed reversal. Two catalogue entries share the L 327249 cone but use different cups; this one, L327249, takes the 210 cup and is ground for the resulting 177.008 mm OD / 25.4 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.For a 133.35 mm shaft carrying combined load, SKF lists L327249 under catalogue execution SKF L 327249/210: one open single-row tapered roller bearing in the inch L327200-series.In SKF inch-series tables L327249 sits at 133.35 mm bore (5.25 in) with a 177.008 mm cup OD and 25.4 mm total width — dimensions that trace back to the original Timken boundary plan for the L327200-series family. In SKF suffix language a bare L327249 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately.
Typical equipment & failure modes
Common applications
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion gearboxes
- heavy-duty rolling-mill gearboxes
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
- false brinelling on idle paired sets exposed to machine vibration
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- At 133.35 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 L327200-series inch series at 133.35 mm bore (177.008×25.4 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 166 kN rating of L327249, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 3,200 r/min speed end and heavier preload only where moment stiffness dominates.
- Do not mix brands or executions inside one L327249 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.
- 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 177.008 mm cup race release as noise within the first running hours.
- The 166/280 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 L327249 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF L 327249/210 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single L327249 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 L327249 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 L327249 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit L327249?
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 25.4 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 L327249 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 L327249?
The SKF L 327249/210 is a single-row tapered roller bearing with 133.35 mm bore, 177.008 mm outer diameter and 25.4 mm width (5.25 × 6.969 × 1 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 166 kN, C0 280 kN, fatigue load limit Pu 28 kN, reference speed 2,600 r/min, limiting speed 3,200 r/min, mass about 1700 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.