32034X-DF bearing: complete specifications & equivalents
The 32034X-DF is a ISO 355 radial bearing sized 170 x 260 x 114 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 170 mm |
| Outer diameter D | 260 mm |
| Width B | 114 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1071 kN |
| Basic static load rating C0 | 1830 kN |
| Fatigue load limit Pu | 176 kN |
| Reference speed (thermal) | 1500 rpm |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 21500 g |
| Manufacturer designation | SKF 32034 X/DF |
| 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-df-series range
| Bore d | 6.693 in |
|---|---|
| Outer diameter D | 10.236 in |
| Width B | 4.488 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 45 mm |
| Smallest bore in matched-df-series | 25 mm |
| Largest outer diameter in matched-df-series | 540 mm |
| Width range across matched-df-series | 34.5–280 mm |
| Bore position in matched-df-series (smallest first) | 24 of 35 |
| Bore above smallest matched-df-series size | 145 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32034X | 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 32034X-DF model number is decoded
The rotating cones of 32034X-DF take a m6 seat on the 170 mm shaft; the cups are a transition-to-loose fit so the pair can be clamped to its factory setting during assembly.For a 170 mm shaft carrying reversing axial load, SKF lists 32034X-DF under catalogue execution SKF 32034 X/DF: a factory-matched face-to-face (X) matched pair tapered-roller pair, set and measured as one unit.Digit by digit, 32034X-DF reads as the ISO 355 base bearing 32034 X supplied as a face-to-face (X) matched pair matched pair (/DF); the 170 mm bore and 260 mm OD are per-bearing, the 114 mm width is for the set. Face-to-face matching puts the small rib ends outward, so the pressure cones cross inside the pair; 32034X-DF therefore runs cooler where the shaft expands axially, at the price of lower moment stiffness than an O-arrangement of the same 170 mm bore. Selection arithmetic: the catalogue C 1071 kN and C0 1830 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 176 kN as the fatigue floor. Cross-section geometry: the 45.0 mm half-section ((260−170)/2) places the roller pitch diameter near 215 mm, and the 114 mm axial width sets the abutment depth — geometry that fixes the contact angle behaviour of 32034X-DF. Inspection shorthand: at overhaul, mark both bearings and the spacer of 32034X-DF before disassembly — the set is a matched system, and re-assembling with one component reversed changes the factory setting.
Typical equipment & failure modes
Common applications
- large industrial mixer shafts
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- wind-turbine main shafts
Known failure patterns
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- 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
- edge loading from shaft deflection or housing misalignment
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- A matched /DF set is ground as one system: never separate the two bearings of 32034X-DF or swap the spacer — the factory clearance is lost the moment the set is broken.
- Clamp the 32034X-DF 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 32034X-DF pair axially through the cones, never through the rollers; pressing force across the roller complement brinells the raceways of both bearings at once.
- The 1071/1830 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 32034 X/DF designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of 32034X-DF?
The SKF 32034 X/DF is a matched pair of single-row tapered roller bearings in face-to-face (X) matched pair arrangement with 170 mm bore, 260 mm outer diameter and 114 mm overall width (6.693 × 10.236 × 4.488 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1071 kN, C0 1830 kN, fatigue load limit Pu 176 kN, reference speed 1,500 r/min, limiting speed 2,200 r/min, mass about 21.50 kg.
What does the /DF suffix on 32034X-DF mean?
The base 32034 X is the ISO 355 single-row bearing; the /DF suffix marks the matched-set execution — the arrangement (face-to-face (X)), 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 32034X-DF for one bearing or the pair?
They are for the complete matched pair: C 1071 kN dynamic and C0 1830 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 32034 X table values.
Can 32034X-DF 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 170 mm shaft) and axial clamping through the cones; re-setting in the field destroys the matched clearance class.
When should a face-to-face (X) matched set be chosen?
Choose the face-to-face (X) set where the shaft grows thermally or alignment is imperfect — the converging load lines tolerate deflection. It is the default choice for wheel hubs and general gearbox shafts at the 170 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.