3382-3339 bearing: complete specifications & equivalents
The 3382-3339 is a ANSI ABMA 19.2 radial bearing sized 39.688 x 80.035 x 29.37 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 39.688 mm |
| Outer diameter D | 80.035 mm |
| Width B | 29.37 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 105 kN |
| Basic static load rating C0 | 112 kN |
| Limiting speed (mechanical) | 4800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 666 g |
| Manufacturer designation | NTN 4T-3382/3339 |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); 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 & 4t-inch-series range
| Bore d | 1.563 in |
|---|---|
| Outer diameter D | 3.151 in |
| Width B | 1.156 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 20.2 mm |
| Smallest bore in 4t-inch-series | 12.7 mm |
| Largest outer diameter in 4t-inch-series | 260 mm |
| Width range across 4t-inch-series | 10.998–77.788 mm |
| Bore position in 4t-inch-series (smallest first) | 43 of 148 |
| Bore above smallest 4t-inch-series size | 26.988000000000003 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3382-3321 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN cone 4T-3382 paired with a different cup (3321): cone interchangeable, cup differs — OD, assembled width T and ratings follow the cup. Verify the full cone/cup reference before substituting. |
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 3382-3339 model number is decoded
4T-3382/3339 belongs to the NTN inch 4T tapered roller range (pure-numeric inch family); cone and cup are ordered by their own references and are individually interchangeable with like-numbered parts. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: 3382 identifies the cone of 39.688 mm (1.563 in) bore by catalogue lookup, and 3339 fixes the 80.035 mm OD. Grease relubrication at the 4,800 r/min limiting speed targets the cone-rib contact; sustaining 6,400 r/min needs an oil supply directed at the large roller ends. The printed 105/112 kN ratings belong to the assembled 3382+3339 pair; a sibling row using the same cone with a different cup carries its own rating row because the raceway track shifts with the cup. Mount the 39.688 mm cone with an induction heater (max 120 °C) and press the 80.035 mm cup with a sleeve; driving either ring through the rollers brinells the raceways.
Typical equipment & failure modes
Common applications
- truck and trailer axle hubs on inch-dimensioned axles
- agricultural tractor transmission and PTO shafts
- industrial gearboxes built to inch shafting
- construction-equipment pivot and wheel positions
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- false brinelling on a stationary pair exposed to vibration during transport or standby
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- water-induced pitting when the open bearing sees washdown without external seals
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 39.688 mm class are adjusted in pairs; verify end play against the axle or gearbox drawing and re-torque after bedding-in instead of trusting the first setting on 4T-3382/3339.
- The pure-numeric inch family at 39.688 mm bore (80.035×29.37 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 3382/3339 reference at purchase.
- Fit selection follows the rotating ring: a rotating cone on a 39.688 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- Replacing one half of an adjusted pair without resetting end play negates the 29.37 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Do not confuse T (29.37 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
- The 105/112 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-3382/3339; internal geometry legitimately differs between inch-series makers, so re-verify ratings, adjustment and the exact cone/cup references before substituting another brand on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-3382/3339?
4T-3382/3339 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 39.688 mm bore (1.563 in), 80.035 mm outside diameter and 29.37 mm assembled width T (3.151 × 1.156 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 105 kN, C0 112 kN, grease limiting speed 4,800 r/min, oil speed 6,400 r/min, mass about 666 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-3382/3339 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 3382 cone or the 3339 cup can be replaced by an identical reference from NTN or another ABMA-dimensioned maker. Pairing the cone with a different cup reference is a different catalogue row: OD, assembled T and the 105/112 kN ratings change with the cup.
What is the difference between 4T-3382/3339 and a metric ISO 355 tapered bearing?
4T-3382/3339 follows the ABMA inch boundary plan with cone/cup references; ISO 355 bearings use metric dimension-series numbers (302, 322, …). Even where a metric size looks close to 39.688×80.035×29.37 mm, the envelopes and contact angles differ — the two systems are not drop-in interchangeable; check every boundary value before substituting.
What does the 4T prefix on 4T-3382/3339 mean?
4T is NTN's tapered roller bearing quality mark, stamped on cone and cup in the factory. It identifies NTN's 4T programme and is not a dimension or variant code, so interchange lists quote the bare 3382/3339 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-3382/3339 list two speeds, 4,800 and 6,400 r/min?
The lower figure, 4,800 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 4T-3382/3339 at 6,400 r/min because oil removes rib-contact heat better. Real limits still depend on pair adjustment, oil flow and cooling.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.