BT2B328580-HA1 bearing: complete specifications & equivalents
The BT2B328580-HA1 is a ANSI ABMA 19.2 radial bearing sized 384.175 x 546.1 x 193.675 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 384.175 mm |
| Outer diameter D | 546.1 mm |
| Width B | 193.675 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 3724 kN |
| Basic static load rating C0 | 8300 kN |
| Fatigue load limit Pu | 640 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 166000 g |
| Manufacturer designation | SKF BT2B 328580/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 | 15.125 in |
|---|---|
| Outer diameter D | 21.5 in |
| Width B | 7.625 in |
| ISO bore code | 80 |
| Radial section height (D−d)/2 | 81 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) | 17 of 25 |
| Bore above smallest tdi-series size | 180.97500000000002 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328580 | 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 BT2B328580-HA1 model number is decoded
The 193.675 mm ring width within the 193.675 mm overall width is the space taken by the centre element of the set; abutment and spacer drawings should be dimensioned from the catalogue width table, not scaled from a single-row bearing. 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 166.0 kg mass and the 546.1 mm OD surface. Journal and housing interface: the 384.175 mm bore takes a m6 shaft seat and the 546.1 mm outside diameter pairs with an H7 housing bore; the 193.675 mm width defines shoulder depth and the 166000 g mass is the dead load in thermal-growth calculations. Ordering discipline for BT2B328580-HA1: quote base number and TDIT/Y2 variant together — the base alone is ambiguous because several internal executions share the same 384.175 mm bore boundary. TDI mounting: the double cone takes the m6 shaft seat at 384.175 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 328580/HA1 is a 384.175×546.1×193.675 mm TDI double-row tapered roller bearing — a double cone with two cups, delivered clearance-set as one assembly weighing 166.0 kg.The code SKF BT2B 328580/HA1 is not an ISO 355 number: double-row tapered bearings of this size follow SKF works numbering, where BT2B 328580 fixes the 384.175×546.1×193.675 mm envelope and the variant suffix (TDIT/Y2) fixes the internal execution.
Typical equipment & failure modes
Common applications
- wind-turbine main shafts
- marine propulsion gearboxes
- large industrial mixer shafts
- rolling-mill roll-neck bearings
Known failure patterns
- axial clamping ring bolt relaxation that lets the clearance-set rows walk apart under reversing thrust
- 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 BT2B328580-HA1 by one ring separates the assembly; sling through the 384.175 mm bore or use the shaft as the lifting member.
- Lifting BT2B328580-HA1 by one ring separates the assembly; sling through the 384.175 mm bore or use the shaft as the lifting member.
- Lifting BT2B328580-HA1 by one ring separates the assembly; sling through the 384.175 mm bore or use the shaft as the lifting member.
- The 3724/8300 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 328580/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 BT2B328580-HA1?
The SKF BT2B 328580/HA1 is a double-row tapered roller bearing of TDI design with 384.175 mm bore, 546.1 mm outer diameter and 193.675 mm overall width (15.125 × 21.5 × 7.625 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 3724 kN, C0 8300 kN, fatigue load limit Pu 640 kN, mass about 166.00 kg.
What does the TDIT/Y2 variant code on BT2B328580-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328580 fixes the 384.175×546.1×193.675 mm envelope, and the TDIT/Y2 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 BT2B328580-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 166.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328580-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 BT2B328580-HA1 as a complete assembly in the same TDIT/Y2 variant.
How does BT2B328580-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.