BT2B334087-HA3 bearing: complete specifications & equivalents
The BT2B334087-HA3 is a ANSI ABMA 19.2 radial bearing sized 305.033 x 560 x 199.263 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 305.033 mm |
| Outer diameter D | 560 mm |
| Width B | 199.263 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1677 kN |
| Basic static load rating C0 | 5300 kN |
| Fatigue load limit Pu | 430 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 205000 g |
| Manufacturer designation | SKF BT2B 334087/HA3 |
| 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 | 12.009 in |
|---|---|
| Outer diameter D | 22.047 in |
| Width B | 7.845 in |
| ISO bore code | 87 |
| Radial section height (D−d)/2 | 127.5 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) | 7 of 25 |
| Bore above smallest tdi-series size | 101.83300000000003 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B334087 | 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 BT2B334087-HA3 model number is decoded
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 205.0 kg mass and the 560 mm OD surface. Assembly datum check: verify the 199.263 mm width against the drawing before clamping — the width is the assembled result and the quickest field check that the correct execution of BT2B334087-HA3 is on the shaft. Documentation tip: record the TDIS/N2Y variant with the machine BOM entry for BT2B334087-HA3; 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 305.033 mm bore, and the two single cups are seated separately in the housing — check cup-face contact around the full circumference before axial clamping.BT2B334087-HA3 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 334087/HA3 is not an ISO 355 number: double-row tapered bearings of this size follow SKF works numbering, where BT2B 334087 fixes the 305.033×560×199.263 mm envelope and the variant suffix (TDIS/N2Y) fixes the internal execution. Clearance note for BT2B334087-HA3: the operating clearance is set at the factory by spacer grinding between the two rows; the TDIS/N2Y variant encodes that setting, so the unit mounts without any adjustment — the assembler only verifies seat contact and clamps axially.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- rolling-mill roll-neck bearings
Known failure patterns
- unequal load sharing between the two roller rows when the centre spacer loses its factory grinding
- brinelling of both raceways when mounting force is transmitted through the roller complement
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- edge loading from shaft deflection or housing misalignment
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- The 305.033 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 BT2B334087-HA3.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B334087-HA3 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- Catalogue tables for this size class list no reference speed: derive permissible speed from the application heat balance, and instrument the first run of a BT2B334087-HA3 installation with temperature logging.
- The 1677/5300 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 334087/HA3 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B334087-HA3?
The SKF BT2B 334087/HA3 is a double-row tapered roller bearing of TDI design with 305.033 mm bore, 560 mm outer diameter and 199.263 mm overall width (12.009 × 22.047 × 7.845 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1677 kN, C0 5300 kN, fatigue load limit Pu 430 kN, mass about 205.00 kg.
What does the TDIS/N2Y variant code on BT2B334087-HA3 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 334087 fixes the 305.033×560×199.263 mm envelope, and the TDIS/N2Y 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 BT2B334087-HA3?
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 205.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B334087-HA3 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 BT2B334087-HA3 as a complete assembly in the same TDIS/N2Y variant.
How does BT2B334087-HA3 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.