32048T164X-DB bearing: complete specifications & equivalents
The 32048T164X-DB is a ISO 355 radial bearing sized 240 x 360 x 164 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 240 mm |
| Outer diameter D | 360 mm |
| Width B | 164 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1695 kN |
| Basic static load rating C0 | 3550 kN |
| Fatigue load limit Pu | 315 kN |
| Reference speed (thermal) | 950 rpm |
| Limiting speed (mechanical) | 1600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 54500 g |
| Manufacturer designation | SKF 32048T164 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 | 9.449 in |
|---|---|
| Outer diameter D | 14.173 in |
| Width B | 6.457 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 60 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) | 27 of 30 |
| Bore above smallest matched-db-series size | 205 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32048T164X | 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 32048T164X-DB model number is decoded
Operating context for the 240 mm bore: a shaft of this diameter typically runs in the xl-bore band of industrial duty, and the 360 mm OD places the housing shoulder near 368 mm outer abutment. Inspection shorthand: at overhaul, mark both bearings and the spacer of 32048T164X-DB before disassembly — the set is a matched system, and re-assembling with one component reversed changes the factory setting. Do not separate 32048T164X-DB into single-bearing service stock — as individual bearings the components are not interchangeable with catalogue single-row executions because the rings are ground for the set.Ordering number SKF 32048T164 X/DB in SKF catalogue PUB BU/P1 17000 denotes two single-row tapered roller bearings supplied as a matched back-to-back (O) matched pair set for a 240 mm shaft — one order number, one factory setting.On the SKF nameplate, 32048T164X-DB reads as base 32048T164 X in a /DB matched execution — the suffix is part of the order number because a matched set is ground for a specific axial clearance and cannot be assembled from loose single bearings. In the back-to-back (O) arrangement the load lines diverge toward the shaft axis, giving the pair a wide effective spread: 32048T164X-DB resists overturning moments and tilting loads stiffly, which is why O-sets are preferred for gearbox output shafts and pinion supports. Selection arithmetic: the catalogue C 1695 kN and C0 3550 kN are ratings of the complete pair, not of one bearing — never halve them back to a single-row figure when checking L10 life, and use the pair Pu 315 kN as the fatigue floor.
Typical equipment & failure modes
Common applications
- heavy-duty rolling-mill gearboxes
- large crusher and mineral-processing drives
- wind-turbine main shafts
- large crusher and mineral-processing drives
Known failure patterns
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- brinelling from pressing the cone or cup home through the rollers
- mounting score marks when the cone is cocked over the shaft keyway or a burr
Selection pitfalls — read before you substitute
- Spacer faces must stay parallel within the set's own tolerance; a tilted spacer in 32048T164X-DB concentrates reversing thrust on one bearing and shows up as one-sided raceway wear.
- Setting is built into 32048T164X-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.
- Replace 32048T164X-DB as a complete set: pairing a new bearing with a worn partner leaves the clearance undefined even when the designation matches.
- The 1695/3550 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 32048T164 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 32048T164X-DB?
The SKF 32048T164 X/DB is a matched pair of single-row tapered roller bearings in back-to-back (O) matched pair arrangement with 240 mm bore, 360 mm outer diameter and 164 mm overall width (9.449 × 14.173 × 6.457 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1695 kN, C0 3550 kN, fatigue load limit Pu 315 kN, reference speed 950 r/min, limiting speed 1,600 r/min, mass about 54.50 kg.
What does the /DB suffix on 32048T164X-DB mean?
The base 32048T164 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 32048T164X-DB for one bearing or the pair?
They are for the complete matched pair: C 1695 kN dynamic and C0 3550 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 32048T164 X table values.
Can 32048T164X-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 240 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 240 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.