BT2B328020 bearing: complete specifications & equivalents
The BT2B328020 is a ANSI ABMA 19.2 radial bearing sized 380 x 520 x 148 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 380 mm |
| Outer diameter D | 520 mm |
| Width B | 148 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2289 kN |
| Basic static load rating C0 | 4500 kN |
| Fatigue load limit Pu | 365 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 80000 g |
| Manufacturer designation | SKF BT2B 328020 |
| 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 & tdo-series range
| Bore d | 14.961 in |
|---|---|
| Outer diameter D | 20.472 in |
| Width B | 5.827 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 70 mm |
| Smallest bore in tdo-series | 101.6 mm |
| Largest outer diameter in tdo-series | 596.9 mm |
| Width range across tdo-series | 49.212–284 mm |
| Bore position in tdo-series (smallest first) | 19 of 23 |
| Bore above smallest tdo-series size | 278.4 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328020 | 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 BT2B328020 model number is decoded
Static check: with C0 4500 kN the unit carries shock and standstill load up to the static safety factor of the application; the 365 kN Pu governs the fatigue side of the same calculation. Dimensional interchange map: within its boundary plan the 380×520×148 mm envelope of BT2B328020 is fixed, so shoulder, spacer and seal drawings can be dimensioned straight from the catalogue table. Documentation tip: record the TDO/D variant with the machine BOM entry for BT2B328020; at overhaul the variant code is what lets the supplier reproduce the original clearance setting. TDO mounting: the double cup is clamped in the housing and the two cones take interference on the 380 mm shaft; press force goes through the cone faces only — driving through the rollers brinells both raceways at once.SKF BT2B 328020 belongs to the SKF TDO double-row range — the 380 mm bore entry with a 520 mm outside diameter and 148 mm overall width, built for roll-neck and heavy-gearbox duty.The code SKF BT2B 328020 is not an ISO 355 number: double-row tapered bearings of this size follow SKF works numbering, where BT2B 328020 fixes the 380×520×148 mm envelope and the variant suffix (TDO/D) fixes the internal execution. Lubrication planning: two roller rows inside a 520 mm OD envelope sweep a large contact area per revolution; oil circulation or a defined grease-relubrication interval should be sized against the 80.0 kg assembly mass.
Typical equipment & failure modes
Common applications
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion gearboxes
- heavy-duty rolling-mill gearboxes
Known failure patterns
- brinelling of both raceways when mounting force is transmitted through the roller complement
- brinelling of both raceways when mounting force is transmitted through the roller complement
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- hard-particle indentation of the tapered raceway in unfiltered oil
- mounting score marks when the cone is cocked over the shaft keyway or a burr
Selection pitfalls — read before you substitute
- Never adjust the clearance of BT2B328020 in the field: the two rows are set by ground spacers at the factory, and shim experiments on a 80.0 kg assembly usually end in overheated rows.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328020 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- Do not mix components between units of the same BT2B 328020 base number: cones, cups and spacers are matched per serial — interchange only complete assemblies.
- The 2289/4500 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 328020 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B328020?
The SKF BT2B 328020 is a double-row tapered roller bearing of TDO design with 380 mm bore, 520 mm outer diameter and 148 mm overall width (14.961 × 20.472 × 5.827 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2289 kN, C0 4500 kN, fatigue load limit Pu 365 kN, mass about 80.00 kg.
What does the TDO/D variant code on BT2B328020 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328020 fixes the 380×520×148 mm envelope, and the TDO/D 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 BT2B328020?
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 80.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328020 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 BT2B328020 as a complete assembly in the same TDO/D variant.
How does BT2B328020 react axial load?
The TDO design works as a fixed X arrangement: one double cup with two cones locates the shaft in both axial directions, with load shared between the two rows according to the factory-set clearance.
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.