LM501349-310 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 LM501349-310 model number is decoded

Cone-and-cup identity in LM501349: the leading LM 501349 reference identifies the inner ring, rollers and cage; the trailing 310 reference identifies the outer ring. The LM501300-series series lists alternative cups for the same cone, each producing a different 73.431 mm OD or 19.558 mm width — hence a different SKU even though the bore stays at 41.275 mm.In SKF catalogue PUB BU/P1 17000, LM501349 appears as SKF LM 501349/310: an open, single-row tapered roller bearing in the LM501300-series, supplied with a pressed-steel cage as standard.In SKF inch-series tables LM501349 sits at 41.275 mm bore (1.625 in) with a 73.431 mm cup OD and 19.558 mm total width — dimensions that trace back to the original Timken boundary plan for the LM501300-series family. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. Selection arithmetic: the C0/C ratio is about 1.01 (static 68 kN against dynamic 67.6 kN), typical of a tapered roller sized for axial capacity, and the 7.65 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Specify pairs rather than single units wherever thrust reverses: the tapered contact of LM501349 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Load system: the 67.6 kN basic dynamic rating C and 68 kN static rating C0 give a C0/C balance of 1.01, and dividing C by the 41.275 mm bore yields 1.64 kN per millimetre of journal — a density metric that compares across families; the 7.65 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 41.275 mm shaft carrying variable duty.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 41.275 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 LM501349 pair heats, loses setting control and smears the roller-rib contact.
• The LM501300-series inch series at 41.275 mm bore (73.431×19.558 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.
• Setting is a design value, not an assembly feel: excessive preload in the LM501349 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• At the 67.6 kN rating of LM501349, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 9,000 r/min speed end and heavier preload only where moment stiffness dominates.
• Shaft and housing fillets must clear the bearing chamfer so the 19.558 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 67.6/68 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 LM501349 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 501349/310 designation when purchasing and match the execution to the mounting arrangement.