HM220149A-110 bearing: complete specifications & equivalents
The HM220149A-110 is a ISO 355 radial bearing sized 100 x 157 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 100 mm |
| Outer diameter D | 157 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 303 kN |
| Basic static load rating C0 | 400 kN |
| Fatigue load limit Pu | 42.5 kN |
| Reference speed (thermal) | 3200 rpm |
| Limiting speed (mechanical) | 4000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2900 g |
| Manufacturer designation | SKF HM 220149 A/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 & HM220100-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 6.181 in |
| Width B | 1.654 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 28.5 mm |
| Smallest bore in HM220100-series | 100 mm |
| Largest outer diameter in HM220100-series | 157 mm |
| Width range across HM220100-series | 42–42 mm |
| Bore position in HM220100-series (smallest first) | 1 of 1 |
| Bore above smallest HM220100-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HM220149A-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 HM220149A-110 model number is decoded
Fit selection follows the rotating ring — interference on a rotating cone — and two HM220149A units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Cross-section geometry: the 28.5 mm half-section ((157−100)/2) of this HM200-series unit places the roller large-end pitch diameter at roughly 128 mm, and the 42 mm axial width is split between cone (23 mm) and cup rib (19 mm) — a geometry that sets the contact angle and, with the 2900 g rotating cone mass, the critical speed at which cage-roller imbalance begins. Within the HM220100-series tables, HM 220149 A appears in several rows because SKF lists multiple cup options for the same cone. HM220149A is the 110 variant, with 157 mm OD and 42 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.In SKF catalogue PUB BU/P1 17000, HM220149A appears as SKF HM 220149 A/110: an open, single-row tapered roller bearing in the HM220100-series, supplied with a pressed-steel cage as standard.Digit by digit, HM220149A reads as cone reference / cup reference in the HM220100-series inch series; the 100 mm bore, 157 mm OD and 42 mm width are the metric equivalents of the original inch boundary values. 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. Catalogue mass 2900 g for the 100×157×42 mm open execution covers the pressed-steel cage and standard roller complement; sealed or special-clearance variants differ slightly in mass and carry their own order numbers.
Typical equipment & failure modes
Common applications
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- large process 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
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- Mount the 100 mm bore HM220149A 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 HM220100-series inch series at 100 mm bore (157×42 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 303 kN rating of HM220149A, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 4,000 r/min speed end and heavier preload only where moment stiffness dominates.
- Do not mix brands or executions inside one HM220149A 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 3,200 r/min reference is a thermal criterion under load, while the 4,000 r/min limiting value is the mechanical ceiling — observe both.
- The 303/400 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 HM220149A (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 220149 A/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does HM220149A 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 HM220149A position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit HM220149A?
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 42 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 HM220149A 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 HM220149A?
The SKF HM 220149 A/110 is a single-row tapered roller bearing with 100 mm bore, 157 mm outer diameter and 42 mm width (3.937 × 6.181 × 1.654 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 303 kN, C0 400 kN, fatigue load limit Pu 42.5 kN, reference speed 3,200 r/min, limiting speed 4,000 r/min, mass about 2900 g. It is an open, separable bearing with a pressed-steel cage.
How does the HM220149A 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 HM220100-series code marks the dimensional series. The metric dimensions 100×157×42 mm are the converted equivalents of the original inch boundary dimensions.
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.