LM11749-710 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 LM11749-710 model number is decoded

The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (LM11700-series) ties the pair to a specific boundary plan. Dimensions 17.462×39.878×13.843 mm are the converted metric envelope. 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 82 g for the 17.462×39.878×13.843 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. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of LM11749 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Cross-section geometry: the 11.2 mm half-section ((39.878−17.462)/2) of this LM100-series unit places the roller large-end pitch diameter at roughly 28 mm, and the 13.843 mm axial width is split between cone (8 mm) and cup rib (6 mm) — a geometry that sets the contact angle and, with the 82 g rotating cone mass, the critical speed at which cage-roller imbalance begins. Cone versus cup responsibility in LM11749: the LM 11749 cone carries the 17.462 mm bore, rollers and pressed-steel cage; the 710 cup carries the 39.878 mm OD raceway, the roller-seating rib and the outer press-fit surface. The two references are not interchangeable halves.In SKF catalogue PUB BU/P1 17000, LM11749 appears as SKF LM 11749/710: an open, single-row tapered roller bearing in the LM11700-series, supplied with a pressed-steel cage as standard.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At a 17.462 mm bore the thin cone and cup are easily distorted by an over-tight shaft nut; check seat runout (target Ra ≤ 0.8 µm) and torque the locknut progressively — a pinched LM11749 shows up as gearbox vibration long before it fails.
• The LM11700-series inch series at 17.462 mm bore (39.878×13.843 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.
• 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 LM11749 mounting error.
• 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 LM11749 mounting error.
• Catalogue reference speed and limiting speed are different limits: the 15,000 r/min reference is a thermal criterion under load, while the 18,000 r/min limiting value is the mechanical ceiling — observe both.
• The 26.1/20.8 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 LM11749 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 11749/710 designation when purchasing and match the execution to the mounting arrangement.