M349547-510 bearing: complete specifications & equivalents
The M349547-510 is a ISO 355 radial bearing sized 255.6 x 342.9 x 57.15 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 255.6 mm |
| Outer diameter D | 342.9 mm |
| Width B | 57.15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 698 kN |
| Basic static load rating C0 | 1400 kN |
| Fatigue load limit Pu | 125 kN |
| Reference speed (thermal) | 1300 rpm |
| Limiting speed (mechanical) | 1600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 15000 g |
| Manufacturer designation | SKF M 349547/510 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
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.
Dimensions in inches & M349500-series range
| Bore d | 10.063 in |
|---|---|
| Outer diameter D | 13.5 in |
| Width B | 2.25 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 43.6 mm |
| Smallest bore in M349500-series | 255.6 mm |
| Largest outer diameter in M349500-series | 342.9 mm |
| Width range across M349500-series | 57.15–57.15 mm |
| Bore position in M349500-series (smallest first) | 1 of 2 |
| Bore above smallest M349500-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| M349547-510 | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
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 M349547-510 model number is decoded
Specify pairs rather than single units wherever thrust reverses: the tapered contact of M349547 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Load system: the 698 kN basic dynamic rating C and 1400 kN static rating C0 give a C0/C balance of 2.01, and dividing C by the 255.6 mm bore yields 2.73 kN per millimetre of journal — a density metric that compares across families; the 125 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 255.6 mm shaft carrying variable duty. Housing and abutment design flows from the cup: in M349547 the 510 cup fixes the 342.9 mm OD, the outer-ring face position and the rib shoulder that the rollers contact under thrust, while the M 349547 cone determines the 255.6 mm shaft interface; the 57.15 mm width is the assembled pair value.The SKF M 349547/510 is a 255.6×342.9×57.15 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.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 (M349500-series) ties the pair to a specific boundary plan. Dimensions 255.6×342.9×57.15 mm are the converted metric envelope. In SKF suffix language a bare M349547 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. At 1,300 r/min reference speed the 43.6 mm-section M349547 is governed thermally by preload and lubricant flow; grease or oil selection should be made against that value, with 1,600 r/min as the mechanical ceiling.
Typical equipment & failure modes
Common applications
- wind-turbine main shafts
- marine propulsion gearboxes
- large industrial mixer shafts
- marine propulsion gearboxes
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- roller large-end smearing against the cone rib after EP lubricant film failure
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rib-roller contact scoring from loss of the EP additive film
Selection pitfalls — read before you substitute
- At 255.6 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 255.6 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.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of M349547 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common M349547 mounting error.
- The 15000 g mass and 57.15 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 M349547.
- 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 M349547 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF M 349547/510 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
How does M349547 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load M349547 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit M349547?
For a rotating shaft under normal load, seat the cone on a m6 shaft fit; the cup is usually a loose-to-transition fit in the housing so it can creep slightly and distribute wear. Chamfer and shoulder diameters must clear the bearing rings so the 57.15 mm-wide cup seats square; the mounting setting (end play or preload) is set by the axial position of the cup relative to the cone.
Is M349547 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
What are the dimensions and catalogue data of M349547?
The SKF M 349547/510 is a single-row tapered roller bearing with 255.6 mm bore, 342.9 mm outer diameter and 57.15 mm width (10.063 × 13.5 × 2.25 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 698 kN, C0 1400 kN, fatigue load limit Pu 125 kN, reference speed 1,300 r/min, limiting speed 1,600 r/min, mass about 15000 g. It is an open, separable bearing with a pressed-steel cage.
How does the M349547 inch-series designation work?
Inch-series tapered roller bearings use a Timken-style cone/cup convention: the number before the slash identifies the cone (inner ring with roller and cage assembly), the number after the slash identifies the cup (outer ring), and the M349500-series code marks the dimensional series. The metric dimensions 255.6×342.9×57.15 mm are the converted equivalents of the original inch boundary dimensions.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.