33030T132-DB bearing: complete specifications & equivalents
The 33030T132-DB is a ISO 355 radial bearing sized 150 x 225 x 132 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 132 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 836 kN |
| Basic static load rating C0 | 1730 kN |
| Fatigue load limit Pu | 170 kN |
| Reference speed (thermal) | 1700 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 17000 g |
| Manufacturer designation | SKF 33030T132/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 | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 5.197 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 37.5 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) | 20 of 30 |
| Bore above smallest matched-db-series size | 115 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 33030T132 | 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 33030T132-DB model number is decoded
In the back-to-back (O) arrangement the load lines diverge toward the shaft axis, giving the pair a wide effective spread: 33030T132-DB resists overturning moments and tilting loads stiffly, which is why O-sets are preferred for gearbox output shafts and pinion supports. The C0/C balance of the pair is about 2.07; combined with the 170 kN fatigue limit this frames a set sized for reversing combined load on a 150 mm shaft rather than for pure radial duty. Material and manufacturing detail: the 17000 g catalogue mass reflects through-hardened bearing steel machined to the listed envelope; ring roundness and width tolerance keep the mounted-setting scatter inside the catalogue class. Mounting order matters for 33030T132-DB: seat the first bearing, fit the ground spacer, then the second bearing, and clamp axially as a unit — the 132 mm catalogue width is the assembled result and the gauge for correct assembly. Do not separate 33030T132-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.33030T132-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, 33030T132-DB reads as the ISO 355 base bearing 33030T132 supplied as a back-to-back (O) matched pair matched pair (/DB); the 150 mm bore and 225 mm OD are per-bearing, the 132 mm width is for the set.
Typical equipment & failure modes
Common applications
- offshore winch and drawworks drums
- rolling-mill roll-neck bearings
- heavy-duty rolling-mill gearboxes
- wind-turbine main shafts
Known failure patterns
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- rib-roller contact scoring from loss of the EP additive film
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- A matched /DB set is ground as one system: never separate the two bearings of 33030T132-DB or swap the spacer — the factory clearance is lost the moment the set is broken.
- Spacer faces must stay parallel within the set's own tolerance; a tilted spacer in 33030T132-DB concentrates reversing thrust on one bearing and shows up as one-sided raceway wear.
- Spacer faces must stay parallel within the set's own tolerance; a tilted spacer in 33030T132-DB concentrates reversing thrust on one bearing and shows up as one-sided raceway wear.
- The 836/1730 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 33030T132/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 33030T132-DB?
The SKF 33030T132/DB is a matched pair of single-row tapered roller bearings in back-to-back (O) matched pair arrangement with 150 mm bore, 225 mm outer diameter and 132 mm overall width (5.906 × 8.858 × 5.197 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 836 kN, C0 1730 kN, fatigue load limit Pu 170 kN, reference speed 1,700 r/min, limiting speed 2,600 r/min, mass about 17.00 kg.
What does the /DB suffix on 33030T132-DB mean?
The base 33030T132 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 33030T132-DB for one bearing or the pair?
They are for the complete matched pair: C 836 kN dynamic and C0 1730 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 33030T132 table values.
Can 33030T132-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 150 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 150 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.