BT2B332506-HA2 bearing: complete specifications & equivalents
The BT2B332506-HA2 is a ANSI ABMA 19.2 radial bearing sized 355.6 x 501.65 x 155.575 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 355.6 mm |
| Outer diameter D | 501.65 mm |
| Width B | 155.575 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1976 kN |
| Basic static load rating C0 | 4250 kN |
| Fatigue load limit Pu | 345 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 87000 g |
| Manufacturer designation | SKF BT2B 332506/HA2 |
| 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 in |
|---|---|
| Outer diameter D | 19.75 in |
| Width B | 6.125 in |
| ISO bore code | 06 |
| Radial section height (D−d)/2 | 73 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) | 14 of 23 |
| Bore above smallest tdo-series size | 254.00000000000003 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B332506 | 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 BT2B332506-HA2 model number is decoded
Lubrication planning: two roller rows inside a 501.65 mm OD envelope sweep a large contact area per revolution; oil circulation or a defined grease-relubrication interval should be sized against the 87.0 kg assembly mass. Mass 87.0 kg over a 355.6×501.65×155.575 mm envelope: the steel content itself is a heat sink, but the two roller rows generate roughly twice the friction of a single-row bearing of the same bore. Material and manufacturing detail: the 87000 g catalogue mass reflects through-hardened bearing steel machined to the listed envelope; ring roundness and width tolerance keep the mounted-setting scatter inside the catalogue class. The TDO/D suffix on BT2B332506-HA2 is a design-variant code in the SKF double-row numbering system; it identifies which internal configuration sits inside the 355.6×501.65×155.575 mm envelope. TDO mounting: the double cup is clamped in the housing and the two cones take interference on the 355.6 mm shaft; press force goes through the cone faces only — driving through the rollers brinells both raceways at once.SKF BT2B 332506/HA2 belongs to the SKF TDO double-row range — the 355.6 mm bore entry with a 501.65 mm outside diameter and 155.575 mm overall width, built for roll-neck and heavy-gearbox duty.Numbering for double-row tapered bearings is works-specific: BT2B 332506 denotes the envelope (355.6 mm bore, 501.65 mm OD, 155.575 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.
Typical equipment & failure modes
Common applications
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- marine propulsion gearboxes
Known failure patterns
- brinelling of both raceways when mounting force is transmitted through the roller complement
- thermal clearance loss when housing cooling is undersized for two rows of tapered contact
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- mounting score marks when the cone is cocked over the shaft keyway or a burr
Selection pitfalls — read before you substitute
- 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 BT2B332506-HA2 installation with temperature logging.
- Lifting BT2B332506-HA2 by one ring separates the assembly; sling through the 355.6 mm bore or use the shaft as the lifting member.
- Lifting BT2B332506-HA2 by one ring separates the assembly; sling through the 355.6 mm bore or use the shaft as the lifting member.
- The 1976/4250 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 332506/HA2 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B332506-HA2?
The SKF BT2B 332506/HA2 is a double-row tapered roller bearing of TDO design with 355.6 mm bore, 501.65 mm outer diameter and 155.575 mm overall width (14 × 19.75 × 6.125 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1976 kN, C0 4250 kN, fatigue load limit Pu 345 kN, mass about 87.00 kg.
What does the TDO/D variant code on BT2B332506-HA2 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 332506 fixes the 355.6×501.65×155.575 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 BT2B332506-HA2?
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 87.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B332506-HA2 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 BT2B332506-HA2 as a complete assembly in the same TDO/D variant.
How does BT2B332506-HA2 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.