LM29749-710 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 LM29749-710 model number is decoded

SKF LM29749 (SKF LM 29749/710) is the LM29700-series tapered roller choice for a 38.1 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 65.088×18.034 mm envelope.Reading the designation: LM29749 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 LM29700-series code identifies the dimensional series. The 38.1 mm bore, 65.088 mm OD and 18.034 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. At 8,000 r/min reference speed the 13.5 mm-section LM29749 is governed thermally by preload and lubricant flow; grease or oil selection should be made against that value, with 10,000 r/min as the mechanical ceiling. A single LM29749 locates the shaft in one axial direction only; mount it against a second bearing in O (back-to-back) or X (face-to-face) arrangement, and set the running clearance by the mounting procedure — not by feel. Cross-section geometry: the 13.5 mm half-section ((65.088−38.1)/2) of this LM200-series unit places the roller large-end pitch diameter at roughly 51 mm, and the 18.034 mm axial width is split between cone (10 mm) and cup rib (8 mm) — a geometry that sets the contact angle and, with the 240 g rotating cone mass, the critical speed at which cage-roller imbalance begins. Cup-side note for 710: the outer ring's rib profile and the 65.088 mm outside diameter are cup-specific within the LM29700-series tables, so substituting a different cup against the same LM 29749 cone changes both the assembled 18.034 mm width and the axial free-play setting of the mounted pair.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 38.1 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 LM29749 pair heats, loses setting control and smears the roller-rib contact.
• The LM29700-series inch series at 38.1 mm bore (65.088×18.034 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 LM29749 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the LM29749 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• 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 53/57 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 LM29749 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 29749/710 designation when purchasing and match the execution to the mounting arrangement.