368A-362X bearing: complete specifications & equivalents
The 368A-362X is a ISO 355 radial bearing sized 50.8 x 90 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50.8 mm |
| Outer diameter D | 90 mm |
| Width B | 25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 94 kN |
| Basic static load rating C0 | 91.5 kN |
| Fatigue load limit Pu | 10.4 kN |
| Reference speed (thermal) | 6300 rpm |
| Limiting speed (mechanical) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 580 g |
| Manufacturer designation | SKF 368 A/362 X |
| 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 & 365-series range
| Bore d | 2 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.984 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 19.6 mm |
| Smallest bore in 365-series | 50.8 mm |
| Largest outer diameter in 365-series | 90 mm |
| Width range across 365-series | 20.638–25 mm |
| Bore position in 365-series (smallest first) | 1 of 1 |
| Bore above smallest 365-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 368A-362 | NTN | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
| 368A-362X | 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 368A-362X model number is decoded
At 6,300 r/min reference speed the 19.6 mm-section 368A is governed thermally by preload and lubricant flow; grease or oil selection should be made against that value, with 7,500 r/min as the mechanical ceiling. For a 50.8 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two 368A bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Load system: the 94 kN basic dynamic rating C and 91.5 kN static rating C0 give a C0/C balance of 0.97, and dividing C by the 50.8 mm bore yields 1.85 kN per millimetre of journal — a density metric that compares across families; the 10.4 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 50.8 mm shaft carrying variable duty. From a specification standpoint the 362 X cup is the controlling half of 368A for housing design — it sets the 90 mm OD and the outer abutment diameter — while the 368 A cone controls shaft fit at the 50.8 mm bore; the 25 mm width is the result of the two together.The SKF 368 A/362 X is a 50.8×90×25 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (365-series) ties the pair to a specific boundary plan. Dimensions 50.8×90×25 mm are the converted metric envelope. 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
- pump and compressor shafts
- machine-tool spindles
- belt-driven fan and blower shafts
- 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
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- 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
- On this 50.8 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 368A pair heats, loses setting control and smears the roller-rib contact.
- The 320 series at 50.8 mm bore (90×25 mm) is the low-friction, higher-speed section; it carries less thrust than a 302 of the same bore, so verify the axial load share before swapping.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 368A rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 368A rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- The 368A 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 94/91.5 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 368A (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 368 A/362 X designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single 368A 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 368A 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 368A position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 368A?
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 25 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 368A 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 368A?
The SKF 368 A/362 X is a single-row tapered roller bearing with 50.8 mm bore, 90 mm outer diameter and 25 mm width (2 × 3.543 × 0.984 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 94 kN, C0 91.5 kN, fatigue load limit Pu 10.4 kN, reference speed 6,300 r/min, limiting speed 7,500 r/min, mass about 580 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.