HM231148-110 bearing: complete specifications & equivalents
The HM231148-110 is a ISO 355 radial bearing sized 149.225 x 236.538 x 57.15 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 149.225 mm |
| Outer diameter D | 236.538 mm |
| Width B | 57.15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 629 kN |
| Basic static load rating C0 | 850 kN |
| Fatigue load limit Pu | 86.5 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 9050 g |
| Manufacturer designation | SKF HM 231148/110 |
| 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 & HM231100-series range
| Bore d | 5.875 in |
|---|---|
| Outer diameter D | 9.313 in |
| Width B | 2.25 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 43.7 mm |
| Smallest bore in HM231100-series | 139.7 mm |
| Largest outer diameter in HM231100-series | 236.538 mm |
| Width range across HM231100-series | 57.15–57.15 mm |
| Bore position in HM231100-series (smallest first) | 2 of 2 |
| Bore above smallest HM231100-series size | 9.525000000000006 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HM231148-110 | 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 HM231148-110 model number is decoded
Selection arithmetic: the C0/C ratio is about 1.35 (static 850 kN against dynamic 629 kN), typical of a tapered roller sized for axial capacity, and the 86.5 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Mounting practice for HM231148: the rotating cone takes the interference fit (m6 on a 149.225 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Operating context for the 149.225 mm bore: a shaft of this diameter in the xl-bore band typically runs between 119380 and 179070 r/min in real machinery, and the 236.538 mm outside diameter places the housing shoulder at 245 mm outer abutment; the 57.15 mm width and 9050 g mass together set the shaft critical speed and the housing resonance check for this HM200-series envelope. Inch tapered bearings are matched sets, not mix-and-match components: HM231148 pairs the HM 231148 cone with the 110 cup under the HM231100-series boundary plan, and although the same cone shows up against other cups in the catalogue, each pairing yields a distinct assembled width and a distinct rating row.SKF HM 231148/110 belongs to the SKF single-row tapered roller range — the 149.225 mm bore entry in the inch HM231100-series, dimensioned 236.538 mm OD and 57.15 mm wide.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 (HM231100-series) ties the pair to a specific boundary plan. Dimensions 149.225×236.538×57.15 mm are the converted metric envelope. In SKF suffix language a bare HM231148 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- marine propulsion gearboxes
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
- false brinelling on idle paired sets exposed to machine vibration
- false brinelling on idle paired sets exposed to machine vibration
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- At 149.225 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 HM231100-series inch series at 149.225 mm bore (236.538×57.15 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.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the HM231148 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- Do not mix brands or executions inside one HM231148 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.
- Catalogue reference speed and limiting speed are different limits: the 2,200 r/min reference is a thermal criterion under load, while the 2,600 r/min limiting value is the mechanical ceiling — observe both.
- The 629/850 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 HM231148 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 231148/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single HM231148 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 HM231148 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 HM231148 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit HM231148?
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 57.15 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 HM231148 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 HM231148?
The SKF HM 231148/110 is a single-row tapered roller bearing with 149.225 mm bore, 236.538 mm outer diameter and 57.15 mm width (5.875 × 9.313 × 2.25 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 629 kN, C0 850 kN, fatigue load limit Pu 86.5 kN, reference speed 2,200 r/min, limiting speed 2,600 r/min, mass about 9050 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.