BT2B332685-HA1 bearing: complete specifications & equivalents
The BT2B332685-HA1 is a ANSI ABMA 19.2 radial bearing sized 303.212 x 495.3 x 263.525 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 303.212 mm |
| Outer diameter D | 495.3 mm |
| Width B | 263.525 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 4919 kN |
| Basic static load rating C0 | 9800 kN |
| Fatigue load limit Pu | 750 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 212000 g |
| Manufacturer designation | SKF BT2B 332685/HA1 |
| 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 | 11.937 in |
|---|---|
| Outer diameter D | 19.5 in |
| Width B | 10.375 in |
| ISO bore code | 85 |
| Radial section height (D−d)/2 | 96 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) | 6 of 25 |
| Bore above smallest tdi-series size | 100.012 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B332685 | 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 BT2B332685-HA1 model number is decoded
Mass 212.0 kg over a 303.212×495.3×263.525 mm envelope: the steel content itself is a heat sink, but the two roller rows generate roughly twice the friction of a single-row bearing of the same bore. Operating context for the 303.212 mm bore: a shaft of this diameter typically runs in the xl-bore band of industrial duty, and the 495.3 mm OD places the housing shoulder near 503 mm outer abutment. The TDIT/Y2 execution of BT2B332685-HA1 differs from sibling variants in internal detail — spacer style, rib execution or clearance class — while sharing the 303.212×495.3×263.525 mm boundary; the full designation including the variant is the only safe order reference. TDI mounting: the double cone takes the m6 shaft seat at 303.212 mm bore, and the two single cups are seated separately in the housing — check cup-face contact around the full circumference before axial clamping.BT2B332685-HA1 is a double-row tapered roller bearing of the TDI design, listed by SKF in SKF catalogue PUB BU/P1 17000: one double cone between two single cups in a fixed O arrangement — a stiff, moment-resisting unit with the axial clearance set at the factory.The code SKF BT2B 332685/HA1 is not an ISO 355 number: double-row tapered bearings of this size follow SKF works numbering, where BT2B 332685 fixes the 303.212×495.3×263.525 mm envelope and the variant suffix (TDIT/Y2) fixes the internal execution. The 263.525 mm ring width within the 263.525 mm overall width is the space taken by the centre element of the set; abutment and spacer drawings should be dimensioned from the catalogue width table, not scaled from a single-row bearing.
Typical equipment & failure modes
Common applications
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large industrial mixer shafts
Known failure patterns
- unequal load sharing between the two roller rows when the centre spacer loses its factory grinding
- unequal load sharing between the two roller rows when the centre spacer loses its factory grinding
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- grease degradation after long shelf storage without rotation or re-greasing
- mounting score marks when the cone is cocked over the shaft keyway or a burr
Selection pitfalls — read before you substitute
- Do not mix components between units of the same BT2B 332685 base number: cones, cups and spacers are matched per serial — interchange only complete assemblies.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B332685-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 303.212 mm bore seat must be checked for ovality before mounting — at this size a worn seat lets the cone creep, and fretting debris then works between the rows of BT2B332685-HA1.
- The 4919/9800 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 BT2B 332685/HA1 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B332685-HA1?
The SKF BT2B 332685/HA1 is a double-row tapered roller bearing of TDI design with 303.212 mm bore, 495.3 mm outer diameter and 263.525 mm overall width (11.937 × 19.5 × 10.375 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 4919 kN, C0 9800 kN, fatigue load limit Pu 750 kN, mass about 212.00 kg.
What does the TDIT/Y2 variant code on BT2B332685-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 332685 fixes the 303.212×495.3×263.525 mm envelope, and the TDIT/Y2 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 BT2B332685-HA1?
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 212.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B332685-HA1 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 BT2B332685-HA1 as a complete assembly in the same TDIT/Y2 variant.
How does BT2B332685-HA1 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.