L432348-310 bearing: complete specifications & equivalents
The L432348-310 is a ISO 355 radial bearing sized 158.75 x 205.583 x 23.812 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 158.75 mm |
| Outer diameter D | 205.583 mm |
| Width B | 23.812 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 168 kN |
| Basic static load rating C0 | 280 kN |
| Fatigue load limit Pu | 27 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1900 g |
| Manufacturer designation | SKF L 432348/310 |
| 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 & L432300-series range
| Bore d | 6.25 in |
|---|---|
| Outer diameter D | 8.094 in |
| Width B | 0.937 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 23.4 mm |
| Smallest bore in L432300-series | 158.75 mm |
| Largest outer diameter in L432300-series | 205.583 mm |
| Width range across L432300-series | 23.812–23.813 mm |
| Bore position in L432300-series (smallest first) | 1 of 1 |
| Bore above smallest L432300-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| L432348-310 | 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 L432348-310 model number is decoded
Speed planning uses two different ceilings: 2,200 r/min thermal reference and 2,800 r/min mechanical limiting speed. A single L432348 locates the shaft in one axial direction only; mount it against a second bearing in O (back-to-back) or X (face-to-face) arrangement, and set the running clearance by the mounting procedure — not by feel. Speed envelope and thermal behaviour: at 2,200 r/min thermal reference, the 158.75 mm bore shaft runs at a dn of 349k, and the 23.4 mm section dissipates heat through the cup-to-housing contact path; the 2,800 r/min mechanical ceiling reflects cage strength, and the 1900 g spinning cone contributes gyroscopic moment under rapid speed reversal. Cup-side note for 310: the outer ring's rib profile and the 205.583 mm outside diameter are cup-specific within the L432300-series tables, so substituting a different cup against the same L 432348 cone changes both the assembled 23.812 mm width and the axial free-play setting of the mounted pair.In SKF catalogue PUB BU/P1 17000, L432348 appears as SKF L 432348/310: an open, single-row tapered roller bearing in the L432300-series, supplied with a pressed-steel cage as standard.Numbering ties the bearing to its inch-series envelope: L432348 means a cone and cup matched pair in the L432300-series series — which is why the 158.75×205.583×23.812 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.
Typical equipment & failure modes
Common applications
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large industrial mixer 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
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- At 158.75 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 L432300-series inch series at 158.75 mm bore (205.583×23.812 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 L432348 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- A single L432348 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 L432348 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 168/280 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 L432348 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF L 432348/310 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single L432348 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 L432348 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 L432348 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit L432348?
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 23.812 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 L432348 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 L432348?
The SKF L 432348/310 is a single-row tapered roller bearing with 158.75 mm bore, 205.583 mm outer diameter and 23.812 mm width (6.25 × 8.094 × 0.937 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 168 kN, C0 280 kN, fatigue load limit Pu 27 kN, reference speed 2,200 r/min, limiting speed 2,800 r/min, mass about 1900 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.