L814749-710 bearing: complete specifications & equivalents
The L814749-710 is a ISO 355 radial bearing sized 76.2 x 109.538 x 19.05 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 76.2 mm |
| Outer diameter D | 109.538 mm |
| Width B | 19.05 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 72.1 kN |
| Basic static load rating C0 | 102 kN |
| Fatigue load limit Pu | 11 kN |
| Reference speed (thermal) | 4500 rpm |
| Limiting speed (mechanical) | 5600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 570 g |
| Manufacturer designation | SKF L 814749/710 |
| 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 & L814700-series range
| Bore d | 3 in |
|---|---|
| Outer diameter D | 4.313 in |
| Width B | 0.75 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 16.7 mm |
| Smallest bore in L814700-series | 76.2 mm |
| Largest outer diameter in L814700-series | 109.538 mm |
| Width range across L814700-series | 19.05–19.05 mm |
| Bore position in L814700-series (smallest first) | 1 of 1 |
| Bore above smallest L814700-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| L814749-L814710 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 76.2×109.538×19.05 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| L814749-710 | 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 L814749-710 model number is decoded
Cup-side note for 710: the outer ring's rib profile and the 109.538 mm outside diameter are cup-specific within the L814700-series tables, so substituting a different cup against the same L 814749 cone changes both the assembled 19.05 mm width and the axial free-play setting of the mounted pair.The SKF L 814749/710 is a 76.2×109.538×19.05 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.Numbering ties the bearing to its inch-series envelope: L814749 means a cone and cup matched pair in the L814700-series series — which is why the 76.2×109.538×19.05 mm outline swaps dimensionally with other inch-series bearings of the same code. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. Speed planning uses two different ceilings: 4,500 r/min thermal reference and 5,600 r/min mechanical limiting speed. Specify pairs rather than single units wherever thrust reverses: the tapered contact of L814749 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Load system: the 72.1 kN basic dynamic rating C and 102 kN static rating C0 give a C0/C balance of 1.41, and dividing C by the 76.2 mm bore yields 0.95 kN per millimetre of journal — a density metric that compares across families; the 11 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 76.2 mm shaft carrying variable duty.
Typical equipment & failure modes
Common applications
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
- paper-machine and printing rolls
- heavy industrial gearboxes and speed reducers
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
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- 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
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- Mount the 76.2 mm bore L814749 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
- The L814700-series inch series at 76.2 mm bore (109.538×19.05 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.
- A single L814749 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.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common L814749 mounting error.
- The L814749 shares its ISO 355 envelope with other tapered bearings of the same code but is not a drop-in replacement for a ball bearing: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
- The 72.1/102 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 L814749 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF L 814749/710 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Is L814749 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 L814749?
The SKF L 814749/710 is a single-row tapered roller bearing with 76.2 mm bore, 109.538 mm outer diameter and 19.05 mm width (3 × 4.313 × 0.75 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 72.1 kN, C0 102 kN, fatigue load limit Pu 11 kN, reference speed 4,500 r/min, limiting speed 5,600 r/min, mass about 570 g. It is an open, separable bearing with a pressed-steel cage.
How does the L814749 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 L814700-series code marks the dimensional series. The metric dimensions 76.2×109.538×19.05 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in L814749 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 (L814700-series) groups sizes that share the same boundary-dimension plan.
Can a single L814749 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.