LM742747-710 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 LM742747-710 model number is decoded

LM742747 is a single-row tapered roller bearing in the LM742700-series inch series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by SKF in SKF catalogue PUB BU/P1 17000.On the SKF nameplate, LM742747 denotes a matched cone-and-cup pair: the designation is not a single number but a cone reference and cup reference joined by a slash, with the LM742700-series marking the dimensional series. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. The 76.5 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.82 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. A single LM742747 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. Material and manufacturing detail: the 7900 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the LM700 ISO envelope, with the pressed-steel cage contributing roughly 237 g of the total; the 216.408 mm bore is ground to IT5 roundness and the 285.75 mm OD to IT5 cylindricity, and the 46.038 mm width tolerance keeps the pair-setting scatter within the ISO preload class. Cup-side note for 710: the outer ring's rib profile and the 285.75 mm outside diameter are cup-specific within the LM742700-series tables, so substituting a different cup against the same LM 742747 cone changes both the assembled 46.038 mm width and the axial free-play setting of the mounted pair.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 216.408 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
• The LM742700-series inch series at 216.408 mm bore (285.75×46.038 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 LM742747 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• Setting is a design value, not an assembly feel: excessive preload in the LM742747 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• Shaft and housing fillets must clear the bearing chamfer so the 46.038 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 466/850 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 LM742747 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF LM 742747/710 designation when purchasing and match the execution to the mounting arrangement.