M231649-610 bearing: complete specifications & equivalents
The M231649-610 is a ISO 355 radial bearing sized 152.4 x 222.25 x 46.83 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 152.4 mm |
| Outer diameter D | 222.25 mm |
| Width B | 46.83 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 400 kN |
| Basic static load rating C0 | 630 kN |
| Fatigue load limit Pu | 62 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5850 g |
| Manufacturer designation | SKF M 231649/610 |
| 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 & M231600-series range
| Bore d | 6 in |
|---|---|
| Outer diameter D | 8.75 in |
| Width B | 1.844 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 34.9 mm |
| Smallest bore in M231600-series | 152.4 mm |
| Largest outer diameter in M231600-series | 222.25 mm |
| Width range across M231600-series | 46.83–46.83 mm |
| Bore position in M231600-series (smallest first) | 1 of 1 |
| Bore above smallest M231600-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| M231649-610 | 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 M231649-610 model number is decoded
Journal and housing interface: the 152.4 mm bore takes a m6 shaft seat (upper deviation ~0.305 mm for this diameter range) and the 222.25 mm outside diameter pairs with an H7 housing bore tolerance band of 222.25.000/222.270 mm; the 46.83 mm width defines the shoulder depth, and the 5850 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations. Cup-side note for 610: the outer ring's rib profile and the 222.25 mm outside diameter are cup-specific within the M231600-series tables, so substituting a different cup against the same M 231649 cone changes both the assembled 46.83 mm width and the axial free-play setting of the mounted pair.In SKF catalogue PUB BU/P1 17000, M231649 appears as SKF M 231649/610: an open, single-row tapered roller bearing in the M231600-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 (M231600-series) ties the pair to a specific boundary plan. Dimensions 152.4×222.25×46.83 mm are the converted metric envelope. 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 5850 g for the 152.4×222.25×46.83 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. A single M231649 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.
Typical equipment & failure modes
Common applications
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
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
- false brinelling on idle paired sets exposed to machine vibration
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- At 152.4 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 M231600-series inch series at 152.4 mm bore (222.25×46.83 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 M231649 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- A single M231649 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.
- Open M231649 units need application-supplied sealing and a defined EP lubricant supply; the roller-rib contact is the first to fail when the additive film breaks down.
- The 400/630 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 M231649 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF M 231649/610 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What shaft and housing fits suit M231649?
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 46.83 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 M231649 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 M231649?
The SKF M 231649/610 is a single-row tapered roller bearing with 152.4 mm bore, 222.25 mm outer diameter and 46.83 mm width (6 × 8.75 × 1.844 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 400 kN, C0 630 kN, fatigue load limit Pu 62 kN, reference speed 2,200 r/min, limiting speed 2,600 r/min, mass about 5850 g. It is an open, separable bearing with a pressed-steel cage.
How does the M231649 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 M231600-series code marks the dimensional series. The metric dimensions 152.4×222.25×46.83 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in M231649 mean?
The cone number (before the slash) identifies the inner ring, rollers and cage; the cup number (after the slash) identifies the outer ring. Both are quoted together because a single-row tapered roller bearing is a matched separable pair — the cone and cup are ground to work together and are not interchangeable with arbitrary other parts. The series prefix (M231600-series) groups sizes that share the same boundary-dimension plan.
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.