331527C bearing: complete specifications & equivalents
The 331527C is a ANSI ABMA 19.2 radial bearing sized 346.075 x 488.95 x 174.625 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 346.075 mm |
| Outer diameter D | 488.95 mm |
| Width B | 174.625 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2835 kN |
| Basic static load rating C0 | 6300 kN |
| Fatigue load limit Pu | 510 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 110000 g |
| Manufacturer designation | SKF 331527 C |
| Standard | ANSI ABMA 19.2 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants); 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 & tdi-series range
| Bore d | 13.625 in |
|---|---|
| Outer diameter D | 19.25 in |
| Width B | 6.875 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 71.4 mm |
| Smallest bore in tdi-series | 203.2 mm |
| Largest outer diameter in tdi-series | 595 mm |
| Width range across tdi-series | 84–263.525 mm |
| Bore position in tdi-series (smallest first) | 13 of 25 |
| Bore above smallest tdi-series size | 142.875 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 331527C | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 331527C model number is decoded
Documentation tip: record the TDI/WIY2 variant with the machine BOM entry for 331527C; at overhaul the variant code is what lets the supplier reproduce the original clearance setting. TDI mounting: the double cone takes the m6 shaft seat at 346.075 mm bore, and the two single cups are seated separately in the housing — check cup-face contact around the full circumference before axial clamping.Ordering number SKF 331527 C in SKF catalogue PUB BU/P1 17000 denotes a TDI double-row tapered roller bearing for a 346.075 mm shaft: double cone, two single cups, factory-set internal clearance in the TDI/WIY2 variant.Numbering for double-row tapered bearings is works-specific: 331527 denotes the envelope (346.075 mm bore, 488.95 mm OD, 174.625 mm width) and the suffix the internal design — two bearings with the same base number but different variants are not interchangeable without checking the variant meaning. Load sharing between the two rows of 331527C depends on the ground spacer; field re-grinding or mixing spacers from another unit — even of the same 331527 base — destroys the factory setting. The catalogue publishes no speed ratings for this size class — permissible speed is set by the application thermal balance; plan lubrication and cooling against the 110.0 kg mass and the 488.95 mm OD surface. Material and manufacturing detail: the 110000 g catalogue mass reflects through-hardened bearing steel machined to the listed envelope; ring roundness and width tolerance keep the mounted-setting scatter inside the catalogue class.
Typical equipment & failure modes
Common applications
- wind-turbine main shafts
- marine propulsion gearboxes
- large industrial mixer shafts
- offshore winch and drawworks drums
Known failure patterns
- thermal clearance loss when housing cooling is undersized for two rows of tapered contact
- unequal load sharing between the two roller rows when the centre spacer loses its factory grinding
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- electrical pitting on VFD-driven shafts without grounding protection
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- Lifting 331527C by one ring separates the assembly; sling through the 346.075 mm bore or use the shaft as the lifting member.
- Lifting 331527C by one ring separates the assembly; sling through the 346.075 mm bore or use the shaft as the lifting member.
- Contamination control matters twice over for double-row units: particles trapped between the rows of 331527C cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 2835/6300 kN ratings are SKF catalogue 17000 values for this 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.
- Quote the full SKF 331527 C designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of 331527C?
The SKF 331527 C is a double-row tapered roller bearing of TDI design with 346.075 mm bore, 488.95 mm outer diameter and 174.625 mm overall width (13.625 × 19.25 × 6.875 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2835 kN, C0 6300 kN, fatigue load limit Pu 510 kN, mass about 110.00 kg.
What does the TDI/WIY2 variant code on 331527C mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number 331527 fixes the 346.075×488.95×174.625 mm envelope, and the TDI/WIY2 code identifies the internal design variant — spacer execution, rib detail and clearance class. Same-envelope units under a different variant are not interchangeable without checking the variant meaning.
Why does the catalogue list no speed rating for 331527C?
Bearings of this size class run in slow, heavily loaded machinery where the permissible speed is set by the application heat balance rather than a universal table value. Plan lubrication and cooling against the 110.0 kg assembly mass and instrument the first run with temperature logging.
Can components of 331527C be interchanged with another unit of the same base number?
No — cones, cups and spacers of a double-row set are matched per serial and the clearance is set by selective grinding at the factory. Replace 331527C as a complete assembly in the same TDI/WIY2 variant.
How does 331527C react axial load?
The TDI design works as a fixed O arrangement: one double cone between two single cups gives a wide load spread and high moment stiffness while reacting thrust in both directions through the two rows.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants on 2026-09-29. Read our editorial & correction policy.