HM220149-110 bearing: complete specifications & equivalents
The HM220149-110 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 220149/110 |
| 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 |
|---|---|---|---|
| HM220149-110 | 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 HM220149-110 model number is decoded
For a 100 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two HM220149 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Load system: the 303 kN basic dynamic rating C and 400 kN static rating C0 give a C0/C balance of 1.32, and dividing C by the 100 mm bore yields 3.03 kN per millimetre of journal — a density metric that compares across families; the 42.5 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 100 mm shaft carrying variable duty. From a specification standpoint the 110 cup is the controlling half of HM220149 for housing design — it sets the 157 mm OD and the outer abutment diameter — while the HM 220149 cone controls shaft fit at the 100 mm bore; the 42 mm width is the result of the two together.Ordering number SKF HM 220149/110 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 100 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.In SKF inch-series tables HM220149 sits at 100 mm bore (3.937 in) with a 157 mm cup OD and 42 mm total width — dimensions that trace back to the original Timken boundary plan for the HM220100-series family. In SKF suffix language a bare HM220149 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. With C 303 kN and C0 400 kN, the HM220149 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 4,000 r/min.
Typical equipment & failure modes
Common applications
- marine deck machinery shafts
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- heavy industrial gearboxes and speed reducers
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
- roller large-end smearing against the cone rib after EP lubricant film failure
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- Mount the 100 mm bore HM220149 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.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the HM220149 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- 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 HM220149 mounting error.
- 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 HM220149 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 220149/110 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does HM220149 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 HM220149 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit HM220149?
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 HM220149 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 HM220149?
The SKF HM 220149/110 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 HM220149 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.