BT2B332603-HA1 bearing: complete specifications & equivalents
The BT2B332603-HA1 is a ANSI ABMA 19.2 radial bearing sized 368.249 x 523.875 x 214.312 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 368.249 mm |
| Outer diameter D | 523.875 mm |
| Width B | 214.312 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 3380 kN |
| Basic static load rating C0 | 7500 kN |
| Fatigue load limit Pu | 585 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 140000 g |
| Manufacturer designation | SKF BT2B 332603/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 & tdo-series range
| Bore d | 14.498 in |
|---|---|
| Outer diameter D | 20.625 in |
| Width B | 8.437 in |
| ISO bore code | 03 |
| Radial section height (D−d)/2 | 77.8 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) | 16 of 23 |
| Bore above smallest tdo-series size | 266.649 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B332603 | 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 BT2B332603-HA1 model number is decoded
When cross-referencing BT2B332603-HA1, note that the TDO/D 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. TDO mounting: the double cup is clamped in the housing and the two cones take interference on the 368.249 mm shaft; press force goes through the cone faces only — driving through the rollers brinells both raceways at once.BT2B332603-HA1 is a double-row tapered roller bearing of the TDO design, listed by SKF in SKF catalogue PUB BU/P1 17000: one double cup and two cones in a fixed X arrangement with the axial clearance set at the factory — a ready-to-mount unit for heavy combined load.Reading the designation: BT2B 332603 is the SKF double-row base number tied to the 368.249 mm bore and 523.875 mm OD, and the TDO/D suffix identifies the internal design variant — cup/cone configuration, spacer execution and clearance class are encoded there rather than in a generic suffix. Load sharing between the two rows of BT2B332603-HA1 depends on the ground spacer; field re-grinding or mixing spacers from another unit — even of the same BT2B 332603 base — destroys the factory setting. Static check: with C0 7500 kN the unit carries shock and standstill load up to the static safety factor of the application; the 585 kN Pu governs the fatigue side of the same calculation. Cross-section geometry: the 77.8 mm half-section ((523.875−368.249)/2) places the roller pitch diameter near 446 mm, and the 214.312 mm axial width sets the abutment depth — geometry that fixes the contact angle behaviour of BT2B332603-HA1.
Typical equipment & failure modes
Common applications
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion 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
- rib-roller contact scoring from loss of the EP additive film
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- Do not mix components between units of the same BT2B 332603 base number: cones, cups and spacers are matched per serial — interchange only complete assemblies.
- The 368.249 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 BT2B332603-HA1.
- Never adjust the clearance of BT2B332603-HA1 in the field: the two rows are set by ground spacers at the factory, and shim experiments on a 140.0 kg assembly usually end in overheated rows.
- The 3380/7500 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 332603/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 BT2B332603-HA1?
The SKF BT2B 332603/HA1 is a double-row tapered roller bearing of TDO design with 368.249 mm bore, 523.875 mm outer diameter and 214.312 mm overall width (14.498 × 20.625 × 8.437 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 3380 kN, C0 7500 kN, fatigue load limit Pu 585 kN, mass about 140.00 kg.
What does the TDO/D variant code on BT2B332603-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 332603 fixes the 368.249×523.875×214.312 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 BT2B332603-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 140.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B332603-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 BT2B332603-HA1 as a complete assembly in the same TDO/D variant.
How does BT2B332603-HA1 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.