BT2B328705-HA1 bearing: complete specifications & equivalents
The BT2B328705-HA1 is a ANSI ABMA 19.2 radial bearing sized 390 x 546.1 x 141.288 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 390 mm |
| Outer diameter D | 546.1 mm |
| Width B | 141.288 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2339 kN |
| Basic static load rating C0 | 5100 kN |
| Fatigue load limit Pu | 405 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 102000 g |
| Manufacturer designation | SKF BT2B 328705/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 | 15.354 in |
|---|---|
| Outer diameter D | 21.5 in |
| Width B | 5.563 in |
| ISO bore code | 05 |
| Radial section height (D−d)/2 | 78.1 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) | 19 of 25 |
| Bore above smallest tdi-series size | 186.8 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328705 | 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 BT2B328705-HA1 model number is decoded
Dimensional interchange map: within its boundary plan the 390×546.1×141.288 mm envelope of BT2B328705-HA1 is fixed, so shoulder, spacer and seal drawings can be dimensioned straight from the catalogue table. When cross-referencing BT2B328705-HA1, note that the TDI/Y2 variant is part of the SKF works designation: same-envelope units under another variant code can differ in clearance class and load rating even though d/D/T match. TDI mounting: the double cone takes the m6 shaft seat at 390 mm bore, and the two single cups are seated separately in the housing — check cup-face contact around the full circumference before axial clamping.In SKF catalogue PUB BU/P1 17000, BT2B328705-HA1 appears as SKF BT2B 328705/HA1: a TDI-design double-row tapered roller bearing for a 390 mm shaft, rated C 2339 kN in the TDI/Y2 execution.Reading the designation: BT2B 328705 is the SKF double-row base number tied to the 390 mm bore and 546.1 mm OD, and the TDI/Y2 suffix identifies the internal design variant — cup/cone configuration, spacer execution and clearance class are encoded there rather than in a generic suffix. Substitution checkpoint: another brand's double-row unit of the same 390×546.1×141.288 mm envelope may carry a different internal clearance class — match the TDI/Y2 execution meaning, not just the boundary dimensions, before swapping. Dividing C 2339 kN by the 390 mm bore gives 6.00 kN per millimetre of journal — heavy-section density typical of double-row tapered units built for slow, heavily loaded shafts.
Typical equipment & failure modes
Common applications
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- heavy-duty rolling-mill gearboxes
Known failure patterns
- water or scale ingress at the separable ring parting lines in roll-neck service
- water or scale ingress at the separable ring parting lines in roll-neck service
- 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
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328705-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 390 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 BT2B328705-HA1.
- Never adjust the clearance of BT2B328705-HA1 in the field: the two rows are set by ground spacers at the factory, and shim experiments on a 102.0 kg assembly usually end in overheated rows.
- The 2339/5100 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 328705/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 BT2B328705-HA1?
The SKF BT2B 328705/HA1 is a double-row tapered roller bearing of TDI design with 390 mm bore, 546.1 mm outer diameter and 141.288 mm overall width (15.354 × 21.5 × 5.563 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2339 kN, C0 5100 kN, fatigue load limit Pu 405 kN, mass about 102.00 kg.
What does the TDI/Y2 variant code on BT2B328705-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328705 fixes the 390×546.1×141.288 mm envelope, and the TDI/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 BT2B328705-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 102.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328705-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 BT2B328705-HA1 as a complete assembly in the same TDI/Y2 variant.
How does BT2B328705-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.