BT2B328699G-HA1 bearing: complete specifications & equivalents
The BT2B328699G-HA1 is a ANSI ABMA 19.2 radial bearing sized 317.5 x 422.275 x 128.588 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 317.5 mm |
| Outer diameter D | 422.275 mm |
| Width B | 128.588 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1785 kN |
| Basic static load rating C0 | 4150 kN |
| Fatigue load limit Pu | 345 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 51500 g |
| Manufacturer designation | SKF BT2B 328699 G/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 | 12.5 in |
|---|---|
| Outer diameter D | 16.625 in |
| Width B | 5.063 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 52.4 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) | 9 of 25 |
| Bore above smallest tdi-series size | 114.30000000000001 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328699G | 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 BT2B328699G-HA1 model number is decoded
TDI mounting: the double cone takes the m6 shaft seat at 317.5 mm bore, and the two single cups are seated separately in the housing — check cup-face contact around the full circumference before axial clamping.The SKF BT2B 328699 G/HA1 is a 317.5×422.275×128.588 mm TDI double-row tapered roller bearing — a double cone with two cups, delivered clearance-set as one assembly weighing 51.5 kg.Numbering for double-row tapered bearings is works-specific: BT2B 328699 denotes the envelope (317.5 mm bore, 422.275 mm OD, 128.588 mm width) and the suffix the internal design — two bearings with the same base number but different variants are not interchangeable without checking the variant meaning. At 51.5 kg the BT2B328699G-HA1 assembly needs mechanical handling at mounting — sling through the bore or use lifting eyes on the shaft, and never lift the unit by one ring alone: the rings are separable. 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 51.5 kg mass and the 422.275 mm OD surface. Dimensional interchange map: within its boundary plan the 317.5×422.275×128.588 mm envelope of BT2B328699G-HA1 is fixed, so shoulder, spacer and seal drawings can be dimensioned straight from the catalogue table. The TDI/GWIY2 execution of BT2B328699G-HA1 differs from sibling variants in internal detail — spacer style, rib execution or clearance class — while sharing the 317.5×422.275×128.588 mm boundary; the full designation including the variant is the only safe order reference.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- offshore winch and drawworks drums
Known failure patterns
- axial clamping ring bolt relaxation that lets the clearance-set rows walk apart under reversing thrust
- thermal clearance loss when housing cooling is undersized for two rows of tapered contact
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- 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
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328699G-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328699G-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 317.5 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 BT2B328699G-HA1.
- The 1785/4150 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 328699 G/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 BT2B328699G-HA1?
The SKF BT2B 328699 G/HA1 is a double-row tapered roller bearing of TDI design with 317.5 mm bore, 422.275 mm outer diameter and 128.588 mm overall width (12.5 × 16.625 × 5.063 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1785 kN, C0 4150 kN, fatigue load limit Pu 345 kN, mass about 51.50 kg.
What does the TDI/GWIY2 variant code on BT2B328699G-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328699 fixes the 317.5×422.275×128.588 mm envelope, and the TDI/GWIY2 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 BT2B328699G-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 51.5 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328699G-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 BT2B328699G-HA1 as a complete assembly in the same TDI/GWIY2 variant.
How does BT2B328699G-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.