LM501349-314 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 LM501349-314 model number is decoded

Speed planning uses two different ceilings: 7,500 r/min thermal reference and 9,000 r/min mechanical limiting speed. Because the contact line is tapered, one LM501349 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 41.275 mm shaft typically takes a k5 seat with an H7 housing bore. Cross-section geometry: the 16.1 mm half-section ((73.431−41.275)/2) of this LM500-series unit places the roller large-end pitch diameter at roughly 57 mm, and the 21.43 mm axial width is split between cone (12 mm) and cup rib (10 mm) — a geometry that sets the contact angle and, with the 360 g rotating cone mass, the critical speed at which cage-roller imbalance begins. Housing and abutment design flows from the cup: in LM501349 the 314 cup fixes the 73.431 mm OD, the outer-ring face position and the rib shoulder that the rollers contact under thrust, while the LM 501349 cone determines the 41.275 mm shaft interface; the 21.43 mm width is the assembled pair value.Ordering number SKF LM 501349/314 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 41.275 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.Numbering ties the bearing to its inch-series envelope: LM501349 means a cone and cup matched pair in the LM501300-series series — which is why the 41.275×73.431×21.43 mm outline swaps dimensionally with other inch-series bearings of the same code. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers.

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 (73.431×21.43 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.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of LM501349 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• A single LM501349 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.
• Never press both rings through the wrong element during fitting: force for an interference shaft seat goes through the cone only, or brinell marks on the 73.431 mm cup race release as noise within the first running hours.
• 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 501349/314 designation when purchasing and match the execution to the mounting arrangement.