32052T189X-DB bearing: complete specifications & equivalents
The 32052T189X-DB is a ISO 355 radial bearing sized 260 x 400 x 189 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 260 mm |
| Outer diameter D | 400 mm |
| Width B | 189 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2127 kN |
| Basic static load rating C0 | 4400 kN |
| Fatigue load limit Pu | 380 kN |
| Reference speed (thermal) | 850 rpm |
| Limiting speed (mechanical) | 1400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 79500 g |
| Manufacturer designation | SKF 32052T189 X/DB |
| Standard | ISO 355 |
| 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 & matched-db-series range
| Bore d | 10.236 in |
|---|---|
| Outer diameter D | 15.748 in |
| Width B | 7.441 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 70 mm |
| Smallest bore in matched-db-series | 35 mm |
| Largest outer diameter in matched-db-series | 480 mm |
| Width range across matched-db-series | 41.5–288 mm |
| Bore position in matched-db-series (smallest first) | 28 of 30 |
| Bore above smallest matched-db-series size | 225 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32052T189X | 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 32052T189X-DB model number is decoded
Catalogue mass 79500 g covers both bearings and the ground spacer of 32052T189X-DB; keep the set complete — substituting one bearing or a non-ground spacer destroys the factory clearance. Assembly datum check: verify the 189 mm width against the drawing before clamping — the width is the assembled result and the quickest field check that the correct execution of 32052T189X-DB is on the shaft. Spacer discipline: the spacer between the two bearings of 32052T189X-DB is ground to the individual set — it carries a serial link to the pair, so never swap spacers between sets of the same designation. Lubrication for the pair should be sized against the combined 189 mm width and 79500 g mass: two roller sets sweep twice the contact area of a single bearing of the same bore.32052T189X-DB is a matched pair of single-row tapered roller bearings arranged back-to-back (O) matched pair, supplied by SKF in SKF catalogue PUB BU/P1 17000 as one factory-set unit: the two bearings, spacers and setting are matched together and must not be mixed with other sets.Digit by digit, 32052T189X-DB reads as the ISO 355 base bearing 32052T189 X supplied as a back-to-back (O) matched pair matched pair (/DB); the 260 mm bore and 400 mm OD are per-bearing, the 189 mm width is for the set. In the back-to-back (O) arrangement the load lines diverge toward the shaft axis, giving the pair a wide effective spread: 32052T189X-DB resists overturning moments and tilting loads stiffly, which is why O-sets are preferred for gearbox output shafts and pinion supports.
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
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- rib-roller contact scoring from loss of the EP additive film
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- O and X arrangements are not interchangeable by turning the set around: 32052T189X-DB in back-to-back (O) matched pair arrangement has its load-line geometry fixed — specify the arrangement from the shaft thermal and stiffness analysis.
- Clamp the 32052T189X-DB pair axially through the cones, never through the rollers; pressing force across the roller complement brinells the raceways of both bearings at once.
- Clamp the 32052T189X-DB pair axially through the cones, never through the rollers; pressing force across the roller complement brinells the raceways of both bearings at once.
- The 2127/4400 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 32052T189 X/DB designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of 32052T189X-DB?
The SKF 32052T189 X/DB is a matched pair of single-row tapered roller bearings in back-to-back (O) matched pair arrangement with 260 mm bore, 400 mm outer diameter and 189 mm overall width (10.236 × 15.748 × 7.441 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2127 kN, C0 4400 kN, fatigue load limit Pu 380 kN, reference speed 850 r/min, limiting speed 1,400 r/min, mass about 79.50 kg.
What does the /DB suffix on 32052T189X-DB mean?
The base 32052T189 X is the ISO 355 single-row bearing; the /DB suffix marks the matched-set execution — the arrangement (back-to-back (O)), the ground spacer and the factory-set axial clearance class. A matched set cannot be assembled from loose single bearings; quote the full designation when ordering.
Are the C and C0 ratings of 32052T189X-DB for one bearing or the pair?
They are for the complete matched pair: C 2127 kN dynamic and C0 4400 kN static already include load sharing between the two bearings. Do not halve them for single-bearing checks, and do not compare them directly with the single-row 32052T189 X table values.
Can 32052T189X-DB be adjusted like two loose tapered bearings?
No — the axial clearance is set at the factory by selective spacer grinding. Mounting work is limited to clean seats, correct fits (m6 on a rotating 260 mm shaft) and axial clamping through the cones; re-setting in the field destroys the matched clearance class.
When should a back-to-back (O) matched set be chosen?
Choose the back-to-back (O) set where moment stiffness dominates — pinion supports, gearbox output shafts, crane sheaves. The diverging load lines give the widest effective spread at the 260 mm bore.
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.