898-892 bearing: complete specifications & equivalents
The 898-892 is a ISO 355 radial bearing sized 139.7 x 228.6 x 57.15 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 139.7 mm |
| Outer diameter D | 228.6 mm |
| Width B | 57.15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 578 kN |
| Basic static load rating C0 | 800 kN |
| Fatigue load limit Pu | 80 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8950 g |
| Manufacturer designation | SKF 898/892 |
| 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 & 895-series range
| Bore d | 5.5 in |
|---|---|
| Outer diameter D | 9 in |
| Width B | 2.25 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 44.5 mm |
| Smallest bore in 895-series | 139.7 mm |
| Largest outer diameter in 895-series | 228.6 mm |
| Width range across 895-series | 57.15–57.15 mm |
| Bore position in 895-series (smallest first) | 1 of 1 |
| Bore above smallest 895-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 898-892-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 139.7×228.6×57.15 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 898-892 | 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 898-892 model number is decoded
898 is a single-row tapered roller bearing in the 895-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.Reading the designation: 898 follows the Timken-style inch convention — the cone (inner ring with rollers) and cup (outer ring) are quoted as a pair separated by a slash, and the 895-series code identifies the dimensional series. The 139.7 mm bore, 228.6 mm OD and 57.15 mm width are the metric equivalents of the inch boundary dimensions. 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. Catalogue mass 8950 g for the 139.7×228.6×57.15 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. Fit selection follows the rotating ring — interference on a rotating cone — and two 898 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Material and manufacturing detail: the 8950 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the 89800 ISO envelope, with the pressed-steel cage contributing roughly 269 g of the total; the 139.7 mm bore is ground to IT5 roundness and the 228.6 mm OD to IT5 cylindricity, and the 57.15 mm width tolerance keeps the pair-setting scatter within the ISO preload class. Inch tapered bearings are matched sets, not mix-and-match components: 898 pairs the 898 cone with the 892 cup under the 895-series boundary plan, and although the same cone shows up against other cups in the catalogue, each pairing yields a distinct assembled width and a distinct rating row.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- 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
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- At 139.7 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 895-series inch series at 139.7 mm bore (228.6×57.15 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.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 898 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 898 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- The 578/800 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 898 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 898/892 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What are the dimensions and catalogue data of 898?
The SKF 898/892 is a single-row tapered roller bearing with 139.7 mm bore, 228.6 mm outer diameter and 57.15 mm width (5.5 × 9 × 2.25 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 578 kN, C0 800 kN, fatigue load limit Pu 80 kN, reference speed 2,200 r/min, limiting speed 2,800 r/min, mass about 8950 g. It is an open, separable bearing with a pressed-steel cage.
How does the 898 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 895-series code marks the dimensional series. The metric dimensions 139.7×228.6×57.15 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in 898 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 (895-series) groups sizes that share the same boundary-dimension plan.
Can a single 898 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 898 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 898 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
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.