1982-1924A bearing: complete specifications & equivalents
The 1982-1924A is a ISO 355 radial bearing sized 27.487 x 57.159 x 19.845 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 27.487 mm |
| Outer diameter D | 57.159 mm |
| Width B | 19.845 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 55.6 kN |
| Basic static load rating C0 | 51 kN |
| Fatigue load limit Pu | 5.6 kN |
| Reference speed (thermal) | 10000 rpm |
| Limiting speed (mechanical) | 12000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 230 g |
| Manufacturer designation | SKF 1982/1924 A |
| 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 & 1900-series range
| Bore d | 1.082 in |
|---|---|
| Outer diameter D | 2.25 in |
| Width B | 0.781 in |
| ISO bore code | 82 |
| Radial section height (D−d)/2 | 14.8 mm |
| Smallest bore in 1900-series | 27.487 mm |
| Largest outer diameter in 1900-series | 57.159 mm |
| Width range across 1900-series | 19.845–19.845 mm |
| Bore position in 1900-series (smallest first) | 1 of 2 |
| Bore above smallest 1900-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1982-1924A | 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 1982-1924A model number is decoded
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 (1900-series) ties the pair to a specific boundary plan. Dimensions 27.487×57.159×19.845 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. The 14.8 mm radial section height ((57.159−27.487)/2) and 230 g catalogue mass frame a 27.487 mm bore bearing rated at 55.6 kN C — roughly 2.02 kN of dynamic capacity per millimetre of bore before application factors. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 1982 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Speed envelope and thermal behaviour: at 10,000 r/min thermal reference, the 27.487 mm bore shaft runs at a dn of 275k, and the 14.8 mm section dissipates heat through the cup-to-housing contact path; the 12,000 r/min mechanical ceiling reflects cage strength, and the 230 g spinning cone contributes gyroscopic moment under rapid speed reversal. Cup-side note for 1924 A: the outer ring's rib profile and the 57.159 mm outside diameter are cup-specific within the 1900-series tables, so substituting a different cup against the same 1982 cone changes both the assembled 19.845 mm width and the axial free-play setting of the mounted pair.SKF 1982/1924 A belongs to the SKF single-row tapered roller range — the 27.487 mm bore entry in the inch 1900-series, dimensioned 57.159 mm OD and 19.845 mm wide.
Typical equipment & failure modes
Common applications
- industrial gearbox shafts and reducers
- differential and pinion drives
- pump and compressor shafts
- pump and compressor 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
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- 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
- On this 27.487 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 1982 pair heats, loses setting control and smears the roller-rib contact.
- The 1900-series inch series at 27.487 mm bore (57.159×19.845 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.
- 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 1982 mounting error.
- At the 55.6 kN rating of 1982, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 12,000 r/min speed end and heavier preload only where moment stiffness dominates.
- Open 1982 units need application-supplied sealing and a defined EP lubricant supply; the roller-rib contact is the first to fail when the additive film breaks down.
- The 55.6/51 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 1982 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 1982/1924 A designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does the 1982 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 1900-series code marks the dimensional series. The metric dimensions 27.487×57.159×19.845 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in 1982 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 (1900-series) groups sizes that share the same boundary-dimension plan.
Can a single 1982 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 1982 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 1982 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 1982?
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 19.845 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.