32010T50X-DB bearing: complete specifications & equivalents
The 32010T50X-DB is a ISO 355 radial bearing sized 50 x 80 x 50 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 80 mm |
| Width B | 50 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 129 kN |
| Basic static load rating C0 | 176 kN |
| Fatigue load limit Pu | 19.3 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 8000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 860 g |
| Manufacturer designation | SKF 32010T50 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 | 1.969 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 1.969 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 15 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) | 4 of 30 |
| Bore above smallest matched-db-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32010T50X | 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 32010T50X-DB model number is decoded
A matched /DB set needs no setting adjustment at mounting: the clearance is built in; the assembler's job is clean seats, correct fits (k5 on a 50 mm rotating shaft) and square abutments.SKF 32010T50 X/DB belongs to the SKF matched tapered-roller range — the 50 mm bore entry in back-to-back (O) matched pair arrangement, dimensioned 80 mm OD and 50 mm overall width for the pair.Reading the designation: 32010T50 X is the ISO 355 single-row base bearing (50 mm bore), and the suffix /DB marks the matched-set execution — arrangement, spacer grinding and factory clearance class. The pair envelope is 50×80×50 mm; the width covers both bearings of the set. Back-to-back matching puts the large rib ends outward — the stiffest arrangement for moment load, but one that converts shaft thermal growth into preload change; the factory setting of 32010T50X-DB already accounts for the expected temperature gradient across the 50 mm pair width. The C0/C balance of the pair is about 1.36; combined with the 19.3 kN fatigue limit this frames a set sized for reversing combined load on a 50 mm shaft rather than for pure radial duty. Assembly datum check: verify the 50 mm width against the drawing before clamping — the width is the assembled result and the quickest field check that the correct execution of 32010T50X-DB is on the shaft. Spacer discipline: the spacer between the two bearings of 32010T50X-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.
Typical equipment & failure modes
Common applications
- automotive and light-truck wheel hubs
- industrial gearbox shafts and reducers
- differential and pinion drives
- belt-driven fan and blower shafts
Known failure patterns
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- electrical pitting on VFD-driven shafts without grounding protection
- 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: 32010T50X-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.
- Setting is built into 32010T50X-DB; the classic field error is re-adjusting a matched pair as if it were two loose single bearings, which destroys the /DB clearance class.
- A matched /DB set is ground as one system: never separate the two bearings of 32010T50X-DB or swap the spacer — the factory clearance is lost the moment the set is broken.
- The 129/176 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 32010T50 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 32010T50X-DB?
The SKF 32010T50 X/DB is a matched pair of single-row tapered roller bearings in back-to-back (O) matched pair arrangement with 50 mm bore, 80 mm outer diameter and 50 mm overall width (1.969 × 3.15 × 1.969 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 129 kN, C0 176 kN, fatigue load limit Pu 19.3 kN, reference speed 5,300 r/min, limiting speed 8,000 r/min, mass about 0.86 kg.
What does the /DB suffix on 32010T50X-DB mean?
The base 32010T50 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 32010T50X-DB for one bearing or the pair?
They are for the complete matched pair: C 129 kN dynamic and C0 176 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 32010T50 X table values.
Can 32010T50X-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 (k5 on a rotating 50 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 50 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.