BT2B331836 bearing: complete specifications & equivalents
The BT2B331836 is a ANSI ABMA 19.2 radial bearing sized 368.3 x 523.875 x 185.738 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 368.3 mm |
| Outer diameter D | 523.875 mm |
| Width B | 185.738 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 3380 kN |
| Basic static load rating C0 | 7500 kN |
| Fatigue load limit Pu | 585 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 133000 g |
| Manufacturer designation | SKF BT2B 331836 |
| 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 | 14.5 in |
|---|---|
| Outer diameter D | 20.625 in |
| Width B | 7.313 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 77.8 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) | 15 of 25 |
| Bore above smallest tdi-series size | 165.10000000000002 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B331836 | 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 BT2B331836 model number is decoded
On the SKF nameplate, BT2B331836 reads as base BT2B 331836 in the TDI/Y2 design variant; boundary dimensions 368.3×523.875×185.738 mm come from the base number, while clearance setting and spacer style come from the variant. Substitution checkpoint: another brand's double-row unit of the same 368.3×523.875×185.738 mm envelope may carry a different internal clearance class — match the TDI/Y2 execution meaning, not just the boundary dimensions, before swapping. 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 133.0 kg mass and the 523.875 mm OD surface. Dimensional interchange map: within its boundary plan the 368.3×523.875×185.738 mm envelope of BT2B331836 is fixed, so shoulder, spacer and seal drawings can be dimensioned straight from the catalogue table. When cross-referencing BT2B331836, note that the TDI/Y2 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. TDI mounting: the double cone takes the m6 shaft seat at 368.3 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 331836 is a 368.3×523.875×185.738 mm TDI double-row tapered roller bearing — a double cone with two cups, delivered clearance-set as one assembly weighing 133.0 kg.
Typical equipment & failure modes
Common applications
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- large crusher and mineral-processing drives
Known failure patterns
- axial clamping ring bolt relaxation that lets the clearance-set rows walk apart under reversing thrust
- axial clamping ring bolt relaxation that lets the clearance-set rows walk apart under reversing thrust
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- The 368.3 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 BT2B331836.
- Lifting BT2B331836 by one ring separates the assembly; sling through the 368.3 mm bore or use the shaft as the lifting member.
- Lifting BT2B331836 by one ring separates the assembly; sling through the 368.3 mm bore or use the shaft as the lifting member.
- The 3380/7500 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 331836 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of BT2B331836?
The SKF BT2B 331836 is a double-row tapered roller bearing of TDI design with 368.3 mm bore, 523.875 mm outer diameter and 185.738 mm overall width (14.5 × 20.625 × 7.313 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 3380 kN, C0 7500 kN, fatigue load limit Pu 585 kN, mass about 133.00 kg.
What does the TDI/Y2 variant code on BT2B331836 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 331836 fixes the 368.3×523.875×185.738 mm envelope, and the TDI/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 BT2B331836?
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 133.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B331836 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 BT2B331836 as a complete assembly in the same TDI/Y2 variant.
How does BT2B331836 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.