BT2B328383-HA1 bearing: complete specifications & equivalents
The BT2B328383-HA1 is a ANSI ABMA 19.2 radial bearing sized 300 x 500 x 203 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 300 mm |
| Outer diameter D | 500 mm |
| Width B | 203 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2992 kN |
| Basic static load rating C0 | 5100 kN |
| Fatigue load limit Pu | 425 kN |
| Operating temperature | -40 to +120 °C |
| Mass | 140000 g |
| Manufacturer designation | SKF BT2B 328383/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 & tdo-series range
| Bore d | 11.811 in |
|---|---|
| Outer diameter D | 19.685 in |
| Width B | 7.992 in |
| ISO bore code | 83 |
| Radial section height (D−d)/2 | 100 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) | 6 of 23 |
| Bore above smallest tdo-series size | 198.4 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| BT2B328383 | 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 BT2B328383-HA1 model number is decoded
The 100.0 mm radial section height ((500−300)/2) and 203 mm width frame a unit whose two rows share reversing thrust; keep the equivalent load P against the pair rating C 2992 kN, never against a single-row figure. Load system: C 2992 kN against C0 5100 kN gives a 1.70 balance, and 9.97 kN of dynamic capacity per millimetre of the 300 mm bore is the density figure to compare against neighbouring sizes. Documentation tip: record the TDO/D2 variant with the machine BOM entry for BT2B328383-HA1; at overhaul the variant code is what lets the supplier reproduce the original clearance setting. In the TDO X-arrangement the two cones of BT2B328383-HA1 locate the shaft in both axial directions; the housing seat for the 500 mm double cup is a loose-to-transition fit so thermal growth does not preload the rows.Ordering number SKF BT2B 328383/HA1 in SKF catalogue PUB BU/P1 17000 denotes a TDO double-row tapered roller bearing for a 300 mm shaft: one double cup, two cone assemblies, spacers ground for a fixed operating clearance.Digit by digit, BT2B328383-HA1 breaks into the base number BT2B 328383 — the 300×500×203 mm boundary — and the TDO/D2 variant code, which is part of the order designation and must be quoted in full at purchase. Lubrication planning: two roller rows inside a 500 mm OD envelope sweep a large contact area per revolution; oil circulation or a defined grease-relubrication interval should be sized against the 140.0 kg assembly mass.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- marine propulsion gearboxes
Known failure patterns
- thermal clearance loss when housing cooling is undersized for two rows of tapered contact
- 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
- electrical pitting on VFD-driven shafts without grounding protection
- grease degradation after long shelf storage without rotation or re-greasing
Selection pitfalls — read before you substitute
- Do not mix components between units of the same BT2B 328383 base number: cones, cups and spacers are matched per serial — interchange only complete assemblies.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328383-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- Contamination control matters twice over for double-row units: particles trapped between the rows of BT2B328383-HA1 cannot migrate out, so flush the housing before assembly and fit filtration matched to the oil flow.
- The 2992/5100 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 328383/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 BT2B328383-HA1?
The SKF BT2B 328383/HA1 is a double-row tapered roller bearing of TDO design with 300 mm bore, 500 mm outer diameter and 203 mm overall width (11.811 × 19.685 × 7.992 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2992 kN, C0 5100 kN, fatigue load limit Pu 425 kN, mass about 140.00 kg.
What does the TDO/D2 variant code on BT2B328383-HA1 mean?
Double-row tapered bearings of this size follow SKF works numbering: the base number BT2B 328383 fixes the 300×500×203 mm envelope, and the TDO/D2 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 BT2B328383-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 140.0 kg assembly mass and instrument the first run with temperature logging.
Can components of BT2B328383-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 BT2B328383-HA1 as a complete assembly in the same TDO/D2 variant.
How does BT2B328383-HA1 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.