HM803146-110 bearing: complete specifications & equivalents
The HM803146-110 is a ISO 355 radial bearing sized 41.275 x 88.9 x 30.162 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 41.275 mm |
| Outer diameter D | 88.9 mm |
| Width B | 30.162 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 116 kN |
| Basic static load rating C0 | 127 kN |
| Fatigue load limit Pu | 14.6 kN |
| Reference speed (thermal) | 6000 rpm |
| Limiting speed (mechanical) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 910 g |
| Manufacturer designation | SKF HM 803146/110 |
| 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 & HM803100-series range
| Bore d | 1.625 in |
|---|---|
| Outer diameter D | 3.5 in |
| Width B | 1.187 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 23.8 mm |
| Smallest bore in HM803100-series | 41.275 mm |
| Largest outer diameter in HM803100-series | 88.9 mm |
| Width range across HM803100-series | 30.162–30.162 mm |
| Bore position in HM803100-series (smallest first) | 1 of 1 |
| Bore above smallest HM803100-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HM803146-110 | 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 HM803146-110 model number is decoded
Numbering ties the bearing to its inch-series envelope: HM803146 means a cone and cup matched pair in the HM803100-series series — which is why the 41.275×88.9×30.162 mm outline swaps dimensionally with other inch-series bearings of the same code. 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. Speed planning uses two different ceilings: 6,000 r/min thermal reference and 7,500 r/min mechanical limiting speed. Specify pairs rather than single units wherever thrust reverses: the tapered contact of HM803146 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Speed envelope and thermal behaviour: at 6,000 r/min thermal reference, the 41.275 mm bore shaft runs at a dn of 248k, and the 23.8 mm section dissipates heat through the cup-to-housing contact path; the 7,500 r/min mechanical ceiling reflects cage strength, and the 910 g spinning cone contributes gyroscopic moment under rapid speed reversal. Cone versus cup responsibility in HM803146: the HM 803146 cone carries the 41.275 mm bore, rollers and pressed-steel cage; the 110 cup carries the 88.9 mm OD raceway, the roller-seating rib and the outer press-fit surface. The two references are not interchangeable halves.For a 41.275 mm shaft carrying combined load, SKF lists HM803146 under catalogue execution SKF HM 803146/110: one open single-row tapered roller bearing in the inch HM803100-series.
Typical equipment & failure modes
Common applications
- automotive and light-truck wheel hubs
- industrial gearbox shafts and reducers
- differential and pinion drives
- 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
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- 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
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- On this 41.275 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 HM803146 pair heats, loses setting control and smears the roller-rib contact.
- The HM803100-series inch series at 41.275 mm bore (88.9×30.162 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.
- At the 116 kN rating of HM803146, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 7,500 r/min speed end and heavier preload only where moment stiffness dominates.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of HM803146 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- Shaft and housing fillets must clear the bearing chamfer so the 30.162 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
- The 116/127 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 HM803146 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 803146/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does the HM803146 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 HM803100-series code marks the dimensional series. The metric dimensions 41.275×88.9×30.162 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in HM803146 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 (HM803100-series) groups sizes that share the same boundary-dimension plan.
Can a single HM803146 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 HM803146 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 HM803146 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit HM803146?
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 30.162 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.