M84548-510 bearing: complete specifications & equivalents
The M84548-510 is a ISO 355 radial bearing sized 25.4 x 57.15 x 19.431 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 25.4 mm |
| Outer diameter D | 57.15 mm |
| Width B | 19.431 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 48.8 kN |
| Basic static load rating C0 | 45 kN |
| Fatigue load limit Pu | 5 kN |
| Reference speed (thermal) | 10000 rpm |
| Limiting speed (mechanical) | 12000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 240 g |
| Manufacturer designation | SKF M 84548/510 |
| 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 & M84500-series range
| Bore d | 1 in |
|---|---|
| Outer diameter D | 2.25 in |
| Width B | 0.765 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 15.9 mm |
| Smallest bore in M84500-series | 25.4 mm |
| Largest outer diameter in M84500-series | 57.15 mm |
| Width range across M84500-series | 19.431–19.431 mm |
| Bore position in M84500-series (smallest first) | 1 of 1 |
| Bore above smallest M84500-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| M84548-M84510 | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| M84548-510 | 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 M84548-510 model number is decoded
In SKF inch-series tables M84548 sits at 25.4 mm bore (1 in) with a 57.15 mm cup OD and 19.431 mm total width — dimensions that trace back to the original Timken boundary plan for the M84500-series family. 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. Speed planning uses two different ceilings: 10,000 r/min thermal reference and 12,000 r/min mechanical limiting speed. For a 25.4 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two M84548 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 10,000 r/min thermal reference, the 25.4 mm bore shaft runs at a dn of 254k, and the 15.9 mm section dissipates heat through the cup-to-housing contact path; the 12,000 r/min mechanical ceiling reflects cage strength, and the 240 g spinning cone contributes gyroscopic moment under rapid speed reversal. Why the cup reference matters here: in the M84500-series tables the M 84548 cone appears against several cup options. M84548 is the pairing with 510, and that choice — not the cone — fixes the 57.15 mm OD, the raceway track position and the 19.431 mm assembled width.Ordering number SKF M 84548/510 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 25.4 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.
Typical equipment & failure modes
Common applications
- automotive and light-truck wheel hubs
- industrial gearbox shafts and reducers
- differential and pinion drives
- differential and pinion drives
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
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- 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
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- On this 25.4 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 M84548 pair heats, loses setting control and smears the roller-rib contact.
- The M84500-series inch series at 25.4 mm bore (57.15×19.431 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 M84548 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 M84548 mounting error.
- The M84548 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 48.8/45 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 M84548 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF M 84548/510 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does the M84548 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 M84500-series code marks the dimensional series. The metric dimensions 25.4×57.15×19.431 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in M84548 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 (M84500-series) groups sizes that share the same boundary-dimension plan.
Can a single M84548 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 M84548 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 M84548 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit M84548?
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 19.431 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.
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.