47896-47820 bearing: complete specifications & equivalents
The 47896-47820 is a ISO 355 radial bearing sized 95.25 x 146.05 x 33.338 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 95.25 mm |
| Outer diameter D | 146.05 mm |
| Width B | 33.338 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 209 kN |
| Basic static load rating C0 | 280 kN |
| Fatigue load limit Pu | 31.5 kN |
| Reference speed (thermal) | 3400 rpm |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1950 g |
| Manufacturer designation | SKF 47896/47820 |
| 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 & 47800-series range
| Bore d | 3.75 in |
|---|---|
| Outer diameter D | 5.75 in |
| Width B | 1.313 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 25.4 mm |
| Smallest bore in 47800-series | 92.075 mm |
| Largest outer diameter in 47800-series | 146.05 mm |
| Width range across 47800-series | 33.338–33.338 mm |
| Bore position in 47800-series (smallest first) | 2 of 2 |
| Bore above smallest 47800-series size | 3.174999999999997 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 47896-47820-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 95.25×146.05×33.338 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 47896-47820 | 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 47896-47820 model number is decoded
Reading the designation: 47896 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 47800-series code identifies the dimensional series. The 95.25 mm bore, 146.05 mm OD and 33.338 mm width are the metric equivalents of the inch boundary dimensions. In SKF suffix language a bare 47896 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Speed planning uses two different ceilings: 3,400 r/min thermal reference and 4,300 r/min mechanical limiting speed. For a 95.25 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two 47896 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Journal and housing interface: the 95.25 mm bore takes a k5 shaft seat (upper deviation ~0.191 mm for this diameter range) and the 146.05 mm outside diameter pairs with an H7 housing bore tolerance band of 146.05.000/146.070 mm; the 33.338 mm width defines the shoulder depth, and the 1950 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations. Within the 47800-series tables, 47896 appears in several rows because SKF lists multiple cup options for the same cone. 47896 is the 47820 variant, with 146.05 mm OD and 33.338 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.SKF 47896 (SKF 47896/47820) is the 47800-series tapered roller choice for a 95.25 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 146.05×33.338 mm envelope.
Typical equipment & failure modes
Common applications
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- rolling-mill auxiliary 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
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- Mount the 95.25 mm bore 47896 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 47800-series inch series at 95.25 mm bore (146.05×33.338 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 47896 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- A single 47896 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 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 209/280 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 47896 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 47896/47820 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does the 47896 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 47800-series code marks the dimensional series. The metric dimensions 95.25×146.05×33.338 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in 47896 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 (47800-series) groups sizes that share the same boundary-dimension plan.
Can a single 47896 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 47896 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 47896 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 47896?
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 33.338 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.