M349549-510 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 M349549-510 model number is decoded

In SKF inch-series tables M349549 sits at 257.175 mm bore (10.125 in) with a 342.9 mm cup OD and 57.15 mm total width — dimensions that trace back to the original Timken boundary plan for the M349500-series family. 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. Catalogue mass 14000 g for the 257.175×342.9×57.15 mm open execution covers the pressed-steel cage and standard roller complement; sealed or special-clearance variants differ slightly in mass and carry their own order numbers. Mounting practice for M349549: the rotating cone takes the interference fit (m6 on a 257.175 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Cross-section geometry: the 42.9 mm half-section ((342.9−257.175)/2) of this M3400-series unit places the roller large-end pitch diameter at roughly 300 mm, and the 57.15 mm axial width is split between cone (31 mm) and cup rib (26 mm) — a geometry that sets the contact angle and, with the 14000 g rotating cone mass, the critical speed at which cage-roller imbalance begins. Cone-and-cup identity in M349549: the leading M 349549 reference identifies the inner ring, rollers and cage; the trailing 510 reference identifies the outer ring. The M349500-series series lists alternative cups for the same cone, each producing a different 342.9 mm OD or 57.15 mm width — hence a different SKU even though the bore stays at 257.175 mm.M349549 is a single-row tapered roller bearing in the M349500-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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 257.175 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 M349500-series inch series at 257.175 mm bore (342.9×57.15 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.
• A single M349549 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.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the M349549 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• 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 342.9 mm cup race release as noise within the first running hours.
• The 698/1400 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 M349549 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF M 349549/510 designation when purchasing and match the execution to the mounting arrangement.