48290-48220 bearing: complete specifications & equivalents
The 48290-48220 is a ISO 355 radial bearing sized 127 x 182.562 x 39.688 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 127 mm |
| Outer diameter D | 182.562 mm |
| Width B | 39.688 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 281 kN |
| Basic static load rating C0 | 440 kN |
| Fatigue load limit Pu | 44 kN |
| Reference speed (thermal) | 2600 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3300 g |
| Manufacturer designation | SKF 48290/48220 |
| 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 & 48200-series range
| Bore d | 5 in |
|---|---|
| Outer diameter D | 7.187 in |
| Width B | 1.563 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 27.8 mm |
| Smallest bore in 48200-series | 127 mm |
| Largest outer diameter in 48200-series | 182.562 mm |
| Width range across 48200-series | 39.688–39.688 mm |
| Bore position in 48200-series (smallest first) | 1 of 1 |
| Bore above smallest 48200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 48290-48220-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 127×182.562×39.688 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 48290-48220 | 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 48290-48220 model number is decoded
Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 48290 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Dimensional interchange map: within the 48200 series at 127 mm bore, the 182.562 mm OD and 39.688 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 27.8 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 3300 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline. Cup-side note for 48220: the outer ring's rib profile and the 182.562 mm outside diameter are cup-specific within the 48200-series tables, so substituting a different cup against the same 48290 cone changes both the assembled 39.688 mm width and the axial free-play setting of the mounted pair.48290 is a single-row tapered roller bearing in the 48200-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: 48290 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 48200-series code identifies the dimensional series. The 127 mm bore, 182.562 mm OD and 39.688 mm width are the metric equivalents of the inch boundary dimensions. In SKF suffix language a bare 48290 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. The 44 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.57 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running.
Typical equipment & failure modes
Common applications
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion gearboxes
- wind-turbine main 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
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- 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
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- At 127 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 48200-series inch series at 127 mm bore (182.562×39.688 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 48290 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.
- Do not mix brands or executions inside one 48290 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
- 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 281/440 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 48290 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 48290/48220 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does 48290 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 48290 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 48290?
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 39.688 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 48290 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 48290?
The SKF 48290/48220 is a single-row tapered roller bearing with 127 mm bore, 182.562 mm outer diameter and 39.688 mm width (5 × 7.187 × 1.563 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 281 kN, C0 440 kN, fatigue load limit Pu 44 kN, reference speed 2,600 r/min, limiting speed 3,200 r/min, mass about 3300 g. It is an open, separable bearing with a pressed-steel cage.
How does the 48290 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 48200-series code marks the dimensional series. The metric dimensions 127×182.562×39.688 mm are the converted equivalents of the original inch boundary dimensions.
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.