95525-95925 bearing: complete specifications & equivalents
The 95525-95925 is a ISO 355 radial bearing sized 133.35 x 234.95 x 63.5 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 133.35 mm |
| Outer diameter D | 234.95 mm |
| Width B | 63.5 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 683 kN |
| Basic static load rating C0 | 900 kN |
| Fatigue load limit Pu | 91.5 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 11000 g |
| Manufacturer designation | SKF 95525/95925 |
| 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 & 95000-series range
| Bore d | 5.25 in |
|---|---|
| Outer diameter D | 9.25 in |
| Width B | 2.5 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 50.8 mm |
| Smallest bore in 95000-series | 133.35 mm |
| Largest outer diameter in 95000-series | 234.95 mm |
| Width range across 95000-series | 63.5–63.5 mm |
| Bore position in 95000-series (smallest first) | 1 of 1 |
| Bore above smallest 95000-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 95525-95925-NTN | NTN | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
| 95525-95925 | 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 95525-95925 model number is decoded
Within the 95000-series tables, 95525 appears in several rows because SKF lists multiple cup options for the same cone. 95525 is the 95925 variant, with 234.95 mm OD and 63.5 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.The SKF 95525/95925 is a 133.35×234.95×63.5 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 (95000-series) ties the pair to a specific boundary plan. Dimensions 133.35×234.95×63.5 mm are the converted metric envelope. In SKF suffix language a bare 95525 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. At 2,200 r/min reference speed the 50.8 mm-section 95525 is governed thermally by preload and lubricant flow; grease or oil selection should be made against that value, with 2,800 r/min as the mechanical ceiling. Mounting practice for 95525: the rotating cone takes the interference fit (m6 on a 133.35 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Speed envelope and thermal behaviour: at 2,200 r/min thermal reference, the 133.35 mm bore shaft runs at a dn of 293k, and the 50.8 mm section dissipates heat through the cup-to-housing contact path; the 2,800 r/min mechanical ceiling reflects cage strength, and the 11000 g spinning cone contributes gyroscopic moment under rapid speed reversal.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- offshore winch and drawworks drums
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
- roller large-end smearing against the cone rib after EP lubricant film failure
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- At 133.35 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 95000-series inch series at 133.35 mm bore (234.95×63.5 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.
- Do not mix brands or executions inside one 95525 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 95525 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- The 683/900 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 95525 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 95525/95925 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Is 95525 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 95525?
The SKF 95525/95925 is a single-row tapered roller bearing with 133.35 mm bore, 234.95 mm outer diameter and 63.5 mm width (5.25 × 9.25 × 2.5 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 683 kN, C0 900 kN, fatigue load limit Pu 91.5 kN, reference speed 2,200 r/min, limiting speed 2,800 r/min, mass about 11000 g. It is an open, separable bearing with a pressed-steel cage.
How does the 95525 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 95000-series code marks the dimensional series. The metric dimensions 133.35×234.95×63.5 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in 95525 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 (95000-series) groups sizes that share the same boundary-dimension plan.
Can a single 95525 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
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.