M239447-410 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 M239447-410 model number is decoded

A single M239447 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. Journal and housing interface: the 189.738 mm bore takes a m6 shaft seat (upper deviation ~0.379 mm for this diameter range) and the 279.4 mm outside diameter pairs with an H7 housing bore tolerance band of 279.4.000/279.420 mm; the 52.388 mm width defines the shoulder depth, and the 11000 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations. Cone-and-cup identity in M239447: the leading M 239447 reference identifies the inner ring, rollers and cage; the trailing 410 reference identifies the outer ring. The M239400-series series lists alternative cups for the same cone, each producing a different 279.4 mm OD or 52.388 mm width — hence a different SKU even though the bore stays at 189.738 mm.SKF M239447 (SKF M 239447/410) is the M239400-series tapered roller choice for a 189.738 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 279.4×52.388 mm envelope.Digit by digit, M239447 reads as cone reference / cup reference in the M239400-series inch series; the 189.738 mm bore, 279.4 mm OD and 52.388 mm width are the metric equivalents of the original inch boundary values. 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. With C 643 kN and C0 980 kN, the M239447 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 2,000 r/min.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 189.738 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 M239400-series inch series at 189.738 mm bore (279.4×52.388 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.
• At the 643 kN rating of M239447, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 2,000 r/min speed end and heavier preload only where moment stiffness dominates.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the M239447 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• The 11000 g mass and 52.388 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 M239447.
• The 643/980 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 M239447 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF M 239447/410 designation when purchasing and match the execution to the mounting arrangement.