L68149-110 bearing: complete specifications & equivalents
The L68149-110 is a ISO 355 radial bearing sized 34.987 x 59.131 x 15.875 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 34.987 mm |
| Outer diameter D | 59.131 mm |
| Width B | 15.875 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 40.6 kN |
| Basic static load rating C0 | 44 kN |
| Fatigue load limit Pu | 4.5 kN |
| Reference speed (thermal) | 9000 rpm |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 170 g |
| Manufacturer designation | SKF L 68149/110 |
| 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 & L68100-series range
| Bore d | 1.377 in |
|---|---|
| Outer diameter D | 2.328 in |
| Width B | 0.625 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 12.1 mm |
| Smallest bore in L68100-series | 34.987 mm |
| Largest outer diameter in L68100-series | 59.975 mm |
| Width range across L68100-series | 15.875–15.875 mm |
| Bore position in L68100-series (smallest first) | 1 of 1 |
| Bore above smallest L68100-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| L68149-L68111 | NTN | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
| L68149-110 | 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 L68149-110 model number is decoded
Catalogue mass 170 g for the 34.987×59.131×15.875 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. Specify pairs rather than single units wherever thrust reverses: the tapered contact of L68149 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Dimensional interchange map: within the L6800 series at 34.987 mm bore, the 59.131 mm OD and 15.875 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 12.1 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 170 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline. A single-row inch tapered bearing is quoted as a cone/cup pair because the boundary dimensions belong to the combination, not to either half alone: in L68149 the L 68149 cone contributes the 34.987 mm bore and roller set, the 110 cup contributes the 59.131 mm OD raceway, and the assembled 15.875 mm width is the catalogue value.L68149 is a single-row tapered roller bearing in the L68100-series inch series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by SKF in SKF catalogue PUB BU/P1 17000.The L68100-series series assigns 34.987 mm bore, 59.131 mm OD and 15.875 mm width to L68149; the cone and cup references are not interchangeable with other inch-series pairs even when the bore matches, because the cup profile and rib geometry are series-specific. In SKF suffix language a bare L68149 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
- industrial gearbox shafts and reducers
- differential and pinion drives
- pump and compressor shafts
- automotive and light-truck wheel hubs
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
- 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
- On this 34.987 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight L68149 pair heats, loses setting control and smears the roller-rib contact.
- The L68100-series inch series at 34.987 mm bore (59.131×15.875 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.
- Setting is a design value, not an assembly feel: excessive preload in the L68149 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- A single L68149 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use an O or X matched pair for bidirectional location.
- The 170 g mass and 15.875 mm width mean spacer and abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one rib of L68149.
- The 40.6/44 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 L68149 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF L 68149/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single L68149 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 L68149 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 L68149 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit L68149?
For a rotating shaft under normal load, seat the cone on a k5 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 15.875 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 L68149 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 L68149?
The SKF L 68149/110 is a single-row tapered roller bearing with 34.987 mm bore, 59.131 mm outer diameter and 15.875 mm width (1.377 × 2.328 × 0.625 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 40.6 kN, C0 44 kN, fatigue load limit Pu 4.5 kN, reference speed 9,000 r/min, limiting speed 11,000 r/min, mass about 170 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.