LM29748-710 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 LM29748-710 model number is decoded

Speed envelope and thermal behaviour: at 8,000 r/min thermal reference, the 38.1 mm bore shaft runs at a dn of 305k, and the 13.5 mm section dissipates heat through the cup-to-housing contact path; the 10,000 r/min mechanical ceiling reflects cage strength, and the 230 g spinning cone contributes gyroscopic moment under rapid speed reversal. Cone-and-cup identity in LM29748: the leading LM 29748 reference identifies the inner ring, rollers and cage; the trailing 710 reference identifies the outer ring. The LM29700-series series lists alternative cups for the same cone, each producing a different 65.088 mm OD or 18.034 mm width — hence a different SKU even though the bore stays at 38.1 mm.In SKF catalogue PUB BU/P1 17000, LM29748 appears as SKF LM 29748/710: an open, single-row tapered roller bearing in the LM29700-series, supplied with a pressed-steel cage as standard.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 (LM29700-series) ties the pair to a specific boundary plan. Dimensions 38.1×65.088×18.034 mm are the converted metric envelope. 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 1.08 (static 57 kN against dynamic 53 kN), typical of a tapered roller sized for axial capacity, and the 6.1 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 LM29748 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat.

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 LM29748 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.
• Setting is a design value, not an assembly feel: excessive preload in the LM29748 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 53 kN rating of LM29748, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 10,000 r/min speed end and heavier preload only where moment stiffness dominates.
• The 230 g mass and 18.034 mm width mean spacer and abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one rib of LM29748.
• 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 LM29748 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 29748/710 designation when purchasing and match the execution to the mounting arrangement.