32926-NTN bearing: complete specifications & equivalents
The 32926-NTN is a ISO 355 radial bearing sized 130 x 180 x 32 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 130 mm |
| Outer diameter D | 180 mm |
| Width B | 32 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 157 kN |
| Basic static load rating C0 | 252 kN |
| Fatigue load limit Pu | 26.9 kN |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2240 g |
| Manufacturer designation | NTN 32926 |
| Standard | ISO 355 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & 32900-series range
| Bore d | 5.118 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 1.26 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in 32900-series | 35 mm |
| Largest outer diameter in 32900-series | 600 mm |
| Width range across 32900-series | 14–100 mm |
| Bore position in 32900-series (smallest first) | 18 of 37 |
| Bore above smallest 32900-series size | 95 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32926 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 130×180×32 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 32926-DF | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
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 32926-NTN model number is decoded
NTN supplies this 130 mm bore tapered roller position as 32926: one cone assembly, one cup, line-contact rollers and a steel cage, rated 157 kN basic dynamic and 252 kN static on the extra-light thin-section 32900 family. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation which is the maker-neutral cross-reference for the 130×180 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. A tapered roller bearing reacts combined radial and one-direction axial load; NTN mounts 32926 cone and cup separately and adjusts end play or preload against a second bearing, so the arrangement locates the shaft in both directions. The 25.0 mm section height over the 130 mm bore positions the load centre; axial location of the pair depends on that contact line, so spacer faces must be square within the P0 tolerance of the bearing. When pairing 32926 with a second tapered bearing, keep the matched arrangement clean: a single stray grit particle between cup and housing changes preload faster than the adjustment range can correct.
Typical equipment & failure modes
Common applications
- large crusher and SAG/AG-mill drive shafts
- wind-turbine gearbox and main-shaft arrangements
- offshore crane and drawworks drums
- heavy haul railway traction gearboxes
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- cage damage from a mounting blow delivered through the roller complement instead of the ring face
- brinell marks on cone and cup raceways from impact during handling or hammering during fitting
Selection pitfalls — read before you substitute
- At 130 mm bore the 32926 set is adjusted with hydraulic nuts on large mill and wind positions; follow the drive-up angle/end-play procedure, because manual torque methods cannot control preload at the 157 kN C level.
- The thin 32 mm section of 32926 is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 130 mm bore smears the roller ends against the rib.
- The 25.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32926 or the ring will bottom out on the radius instead of the shoulder face.
- Open 32926 units have no seals: a wheel-hub or gearbox application needs external sealing or the 1,800 r/min grease figure is meaningless once water reaches the cone rib.
- Do not confuse T (32 mm assembled width of cone + cup) with the cone width when drawing spacers; an abutment sized to T instead of the ring width leaves the cup unseated.
- The 157/252 kN ratings and 26.9 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32926; internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 32926?
32926 is a metric 4T tapered roller bearing to ISO 355: 130 mm bore, 180 mm outside diameter and 32 mm assembled width T (5.118 × 7.087 × 1.26 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 157 kN, C0 252 kN, Pu 26.9 kN, grease limiting speed 1,800 r/min, oil speed 2,400 r/min, mass about 2240 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32926?
4T is NTN's tapered roller bearing brand mark, stamped on the cone and cup in the factory. It identifies the NTN 4T programme and is not a dimension, so the catalogue and this page list the bare ISO 355 number (32926); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32926 designation encode the 130 mm bore?
last two digits 26 are the ISO bore code, ×5 = 130 mm (codes 00–03 use the 10/12/15/17 exception table). The 180 mm OD and 32 mm assembled T follow the ISO 355 dimension-series plan.
Why does 32926 list two speeds, 1,800 and 2,400 r/min?
The lower figure, 1,800 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32926 at 2,400 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32926 mean?
It is the basic open 4T execution — steel cage, adjusted mounting, no seal or feature suffix. NTN uses U for the uprated design, UTG for ULTAGE large-bearing specs, X for the ISO boundary section, and C/CA/D/A for contact-angle or internal-design variants; all are separate order numbers.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.