BT2B328615 bearing: complete specifications & equivalents
The BT2B328615 is a ANSI ABMA 19.2 radial bearing sized 254 x 422.275 x 173.038 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 254 mm |
| Outer diameter D | 422.275 mm |
| Width B | 173.038 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2393 kN |
| Basic static load rating C0 | 4050 kN |
| Fatigue load limit Pu | 355 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 87500 g |
| Manufacturer designation | SKF BT2B 328615 |
| 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 | 10 in |
|---|---|
| Outer diameter D | 16.625 in |
| Width B | 6.813 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 84.1 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) | 4 of 23 |
| Bore above smallest tdo-series size | 152.4 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328615 | 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 BT2B328615 model number is decoded
Numbering for double-row tapered bearings is works-specific: BT2B 328615 denotes the envelope (254 mm bore, 422.275 mm OD, 173.038 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. Wear pattern reading at overhaul: the two rows of BT2B328615 should show symmetric raceway contact; one-sided wear points to housing misalignment or a cocked seat rather than to a material defect. 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 87.5 kg mass and the 422.275 mm OD surface. Journal and housing interface: the 254 mm bore takes a m6 shaft seat and the 422.275 mm outside diameter pairs with an H7 housing bore; the 173.038 mm width defines shoulder depth and the 87500 g mass is the dead load in thermal-growth calculations. Service-parts note: a worn BT2B328615 must be replaced by the same TDO/D variant or by a works-approved successor — the variant encodes the spacer grinding that sets the operating clearance of the two rows. In the TDO X-arrangement the two cones of BT2B328615 locate the shaft in both axial directions; the housing seat for the 422.275 mm double cup is a loose-to-transition fit so thermal growth does not preload the rows.BT2B328615 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.
Typical equipment & failure modes
Common applications
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- heavy-duty rolling-mill gearboxes
Known failure patterns
- unequal load sharing between the two roller rows when the centre spacer loses its factory grinding
- 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
- mounting score marks when the cone is cocked over the shaft keyway or a burr
- rib-roller contact scoring from loss of the EP additive film
Selection pitfalls — read before you substitute
- Lifting BT2B328615 by one ring separates the assembly; sling through the 254 mm bore or use the shaft as the lifting member.
- Lifting BT2B328615 by one ring separates the assembly; sling through the 254 mm bore or use the shaft as the lifting member.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328615 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 2393/4050 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 328615 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B328615?
The SKF BT2B 328615 is a double-row tapered roller bearing of TDO design with 254 mm bore, 422.275 mm outer diameter and 173.038 mm overall width (10 × 16.625 × 6.813 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2393 kN, C0 4050 kN, fatigue load limit Pu 355 kN, mass about 87.50 kg.
What does the TDO/D variant code on BT2B328615 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328615 fixes the 254×422.275×173.038 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 BT2B328615?
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 87.5 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328615 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 BT2B328615 as a complete assembly in the same TDO/D variant.
How does BT2B328615 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.