HM803149-110 bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 HM803149-110 model number is decoded

Ordering number SKF HM 803149/110 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 44.45 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.Reading the designation: HM803149 follows the Timken-style inch convention — the cone (inner ring with rollers) and cup (outer ring) are quoted as a pair separated by a slash, and the HM803000-series code identifies the dimensional series. The 44.45 mm bore, 88.9 mm OD and 30.162 mm width are the metric equivalents of the inch boundary dimensions. 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. The 14.6 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.09 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Because the contact line is tapered, one HM803149 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 44.45 mm shaft typically takes a k5 seat with an H7 housing bore. Operating context for the 44.45 mm bore: a shaft of this diameter in the medium-bore band typically runs between 35560 and 53340 r/min in real machinery, and the 88.9 mm outside diameter places the housing shoulder at 97 mm outer abutment; the 30.162 mm width and 860 g mass together set the shaft critical speed and the housing resonance check for this HM800-series envelope. Within the HM803000-series tables, HM 803149 appears in several rows because SKF lists multiple cup options for the same cone. HM803149 is the 110 variant, with 88.9 mm OD and 30.162 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 44.45 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 HM803149 pair heats, loses setting control and smears the roller-rib contact.
• The HM803000-series inch series at 44.45 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.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the HM803149 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• A single HM803149 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.
• The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
• 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 HM803149 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 803149/110 designation when purchasing and match the execution to the mounting arrangement.