BT2B332831 bearing: complete specifications & equivalents
The BT2B332831 is a ANSI ABMA 19.2 radial bearing sized 360 x 480 x 160 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 360 mm |
| Outer diameter D | 480 mm |
| Width B | 160 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2211 kN |
| Basic static load rating C0 | 5000 kN |
| Fatigue load limit Pu | 405 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 73000 g |
| Manufacturer designation | SKF BT2B 332831 |
| 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 | 14.173 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 6.299 in |
| ISO bore code | 31 |
| Radial section height (D−d)/2 | 60 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) | 15 of 23 |
| Bore above smallest tdo-series size | 258.4 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B332831 | 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 BT2B332831 model number is decoded
The code SKF BT2B 332831 is not an ISO 355 number: double-row tapered bearings of this size follow SKF works numbering, where BT2B 332831 fixes the 360×480×160 mm envelope and the variant suffix (TDO/D) fixes the internal execution. The 128 mm ring width within the 160 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 73.0 kg mass and the 480 mm OD surface. Load system: C 2211 kN against C0 5000 kN gives a 2.26 balance, and 6.14 kN of dynamic capacity per millimetre of the 360 mm bore is the density figure to compare against neighbouring sizes. When cross-referencing BT2B332831, note that the TDO/D variant is part of the SKF works designation: same-envelope units under another variant code can differ in clearance class and load rating even though d/D/T match. TDO mounting: the double cup is clamped in the housing and the two cones take interference on the 360 mm shaft; press force goes through the cone faces only — driving through the rollers brinells both raceways at once.SKF BT2B 332831 belongs to the SKF TDO double-row range — the 360 mm bore entry with a 480 mm outside diameter and 160 mm overall width, built for roll-neck and heavy-gearbox duty.
Typical equipment & failure modes
Common applications
- large crusher and mineral-processing drives
- wind-turbine main shafts
- marine propulsion gearboxes
- marine propulsion gearboxes
Known failure patterns
- brinelling of both raceways when mounting force is transmitted through the roller complement
- brinelling of both raceways when mounting force is transmitted through the roller complement
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- 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
- Never adjust the clearance of BT2B332831 in the field: the two rows are set by ground spacers at the factory, and shim experiments on a 73.0 kg assembly usually end in overheated rows.
- Lifting BT2B332831 by one ring separates the assembly; sling through the 360 mm bore or use the shaft as the lifting member.
- Lifting BT2B332831 by one ring separates the assembly; sling through the 360 mm bore or use the shaft as the lifting member.
- The 2211/5000 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 332831 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B332831?
The SKF BT2B 332831 is a double-row tapered roller bearing of TDO design with 360 mm bore, 480 mm outer diameter and 160 mm overall width (14.173 × 18.898 × 6.299 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2211 kN, C0 5000 kN, fatigue load limit Pu 405 kN, mass about 73.00 kg.
What does the TDO/D variant code on BT2B332831 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 332831 fixes the 360×480×160 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 BT2B332831?
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 73.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B332831 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 BT2B332831 as a complete assembly in the same TDO/D variant.
How does BT2B332831 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.