33015-DFC240 bearing: complete specifications & equivalents
The 33015-DFC240 is a ISO 355 radial bearing sized 75 x 115 x 62 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 115 mm |
| Width B | 62 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 286 kN |
| Basic static load rating C0 | 455 kN |
| Fatigue load limit Pu | 52 kN |
| Reference speed (thermal) | 3600 rpm |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2400 g |
| Manufacturer designation | SKF 33015/DFC240 |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 4.528 in |
| Width B | 2.441 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 20 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) | 11 of 35 |
| Bore above smallest matched-df-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 33015 | 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 33015-DFC240 model number is decoded
Lubrication for the pair should be sized against the combined 62 mm width and 2400 g mass: two roller sets sweep twice the contact area of a single bearing of the same bore.33015-DFC240 (SKF 33015/DFC240) is the face-to-face (X) matched pair matched-set choice for a 75 mm shaft: a pair of tapered roller bearings whose combined envelope is 115×62 mm, delivered ready to mount with controlled internal clearance.Digit by digit, 33015-DFC240 reads as the ISO 355 base bearing 33015 supplied as a face-to-face (X) matched pair matched pair (/DFC240); the 75 mm bore and 115 mm OD are per-bearing, the 62 mm width is for the set. In the face-to-face (X) arrangement the load lines of the two bearings converge toward the shaft axis: the set tolerates shaft deflection and thermal growth better than a back-to-back pair, but is less stiff against overturning moments. The 62 mm overall width of 33015-DFC240 is the axial space the pair occupies. With a pair mass of 2400 g across the 75×115×62 mm envelope, the set replaces what would otherwise be two separate bearings plus spacer grinding work — the factory setting is the engineering value being purchased. Assembly datum check: verify the 62 mm width against the drawing before clamping — the width is the assembled result and the quickest field check that the correct execution of 33015-DFC240 is on the shaft. Mounting order matters for 33015-DFC240: seat the first bearing, fit the ground spacer, then the second bearing, and clamp axially as a unit — the 62 mm catalogue width is the assembled result and the gauge for correct assembly.
Typical equipment & failure modes
Common applications
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
- marine deck machinery shafts
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
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- edge loading from shaft deflection or housing misalignment
- 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 33015-DFC240 concentrates reversing thrust on one bearing and shows up as one-sided raceway wear.
- Clamp the 33015-DFC240 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 33015-DFC240 pair axially through the cones, never through the rollers; pressing force across the roller complement brinells the raceways of both bearings at once.
- The 286/455 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 33015/DFC240 designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of 33015-DFC240?
The SKF 33015/DFC240 is a matched pair of single-row tapered roller bearings in face-to-face (X) matched pair arrangement with 75 mm bore, 115 mm outer diameter and 62 mm overall width (2.953 × 4.528 × 2.441 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 286 kN, C0 455 kN, fatigue load limit Pu 52 kN, reference speed 3,600 r/min, limiting speed 5,300 r/min, mass about 2.40 kg.
What does the /DFC240 suffix on 33015-DFC240 mean?
The base 33015 is the ISO 355 single-row bearing; the /DFC240 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 33015-DFC240 for one bearing or the pair?
They are for the complete matched pair: C 286 kN dynamic and C0 455 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 33015 table values.
Can 33015-DFC240 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 75 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 75 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.