HM911244-210 bearing: complete specifications & equivalents
The HM911244-210 is a ISO 355 radial bearing sized 59.987 x 130.175 x 34.099 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 59.987 mm |
| Outer diameter D | 130.175 mm |
| Width B | 34.099 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 187 kN |
| Basic static load rating C0 | 180 kN |
| Fatigue load limit Pu | 22 kN |
| Reference speed (thermal) | 3800 rpm |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2050 g |
| Manufacturer designation | SKF HM 911244/210 |
| 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 & HM911200-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 5.125 in |
| Width B | 1.342 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 35.1 mm |
| Smallest bore in HM911200-series | 59.987 mm |
| Largest outer diameter in HM911200-series | 130.175 mm |
| Width range across HM911200-series | 34.099–36.512 mm |
| Bore position in HM911200-series (smallest first) | 1 of 2 |
| Bore above smallest HM911200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HM911244-210 | 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 HM911244-210 model number is decoded
Cup-side note for 210: the outer ring's rib profile and the 130.175 mm outside diameter are cup-specific within the HM911200-series tables, so substituting a different cup against the same HM 911244 cone changes both the assembled 34.099 mm width and the axial free-play setting of the mounted pair.HM911244 is a single-row tapered roller bearing in the HM911200-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.Numbering ties the bearing to its inch-series envelope: HM911244 means a cone and cup matched pair in the HM911200-series series — which is why the 59.987×130.175×34.099 mm outline swaps dimensionally with other inch-series bearings of the same code. 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 22 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 0.96 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of HM911244 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Material and manufacturing detail: the 2050 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the HM900 ISO envelope, with the pressed-steel cage contributing roughly 62 g of the total; the 59.987 mm bore is ground to IT5 roundness and the 130.175 mm OD to IT5 cylindricity, and the 34.099 mm width tolerance keeps the pair-setting scatter within the ISO preload class.
Typical equipment & failure modes
Common applications
- marine deck machinery shafts
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- paper-machine and printing rolls
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
- 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
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- Mount the 59.987 mm bore HM911244 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
- The HM911200-series inch series at 59.987 mm bore (130.175×34.099 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 HM911244 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 HM911244 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 3,800 r/min reference is a thermal criterion under load, while the 5,000 r/min limiting value is the mechanical ceiling — observe both.
- The 187/180 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 HM911244 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 911244/210 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Is HM911244 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 HM911244?
The SKF HM 911244/210 is a single-row tapered roller bearing with 59.987 mm bore, 130.175 mm outer diameter and 34.099 mm width (2.362 × 5.125 × 1.342 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 187 kN, C0 180 kN, fatigue load limit Pu 22 kN, reference speed 3,800 r/min, limiting speed 5,000 r/min, mass about 2050 g. It is an open, separable bearing with a pressed-steel cage.
How does the HM911244 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 HM911200-series code marks the dimensional series. The metric dimensions 59.987×130.175×34.099 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in HM911244 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 (HM911200-series) groups sizes that share the same boundary-dimension plan.
Can a single HM911244 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.
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.