7302-NTN bearing: complete specifications & equivalents
The 7302-NTN is a ISO 15 radial bearing sized 15 x 42 x 13 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 15 mm |
| Outer diameter D | 42 mm |
| Width B | 13 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 14.9 kN |
| Basic static load rating C0 | 7.2 kN |
| Fatigue load limit Pu | 0.56 kN |
| Limiting speed (mechanical) | 19000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 55 g |
| Manufacturer designation | NTN 7302 |
| Standard | ISO 15 |
| 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 & 7300-series range
| Bore d | 0.591 in |
|---|---|
| Outer diameter D | 1.654 in |
| Width B | 0.512 in |
| ISO bore code | 02 |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 7300-series | 10 mm |
| Largest outer diameter in 7300-series | 420 mm |
| Width range across 7300-series | 11–80 mm |
| Bore position in 7300-series (smallest first) | 3 of 32 |
| Bore above smallest 7300-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 7302 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×42×13 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 7302-BE-2RZP | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×42×13 mm envelope per ISO 15; seal variant (OPEN vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 7302-BECBP | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×42×13 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 7302-BEP | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×42×13 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application 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 7302-NTN model number is decoded
From the heavy-duty 7300 single-row family, 7302 measures 15 mm across the bore, 42 mm over the outer ring and 13 mm across the faces. Two fields make up the code — 73 is the single-row dimension series (heavy-duty 7300 single-row family) and 02 encodes the 15 mm bore (bore code x 5); with no letter after the digits it is the standard 30 deg contact-angle execution — the 40 deg version carries a B. The oil rating of 26,000 r/min sits 7,000 r/min above the 19,000 r/min grease figure — a 1.37x step that says how much headroom oil cooling buys. Selection starts from the thrust share: as axial load grows past roughly half the radial load, an angular-contact position of this section usually outlives a deep-groove one. A 15 mm shaft typically takes a j5/k5 fit for rotating inner-ring load; keep the housing bore to G6/H6 class so the contact geometry is not distorted.
Typical equipment & failure modes
Common applications
- servo and stepper motor shafts with axial preload
- bicycle and motorcycle wheel and steering positions
- small gearbox pinion shafts with helical gears
- precision instrument and encoder support shafts
Known failure patterns
- impact brinelling dents on the 30 deg contact path after a shaft-side hammer blow during mounting, because axial shock travels straight through the contact angle
- loss of preload after housing-fret or shaft creep, leaving the pair loose — ball skidding, cage rattle and a falling natural frequency follow
- pressed-steel cage pocket wear and rivet loosening after repeated ball skid at light load and high speed
- lubricant starvation scoring at the ball/raceway contact when grease volume or relubrication interval is guessed instead of calculated
- contamination-induced denting — hard particles rolled into the contact ellipse become the initiation points for surface fatigue
Selection pitfalls — read before you substitute
- At 15 mm bore the rings are thin-sectioned: press force must go through the ring being fitted, never through the balls, or the first damage is already in the raceway before the machine runs.
- The standard 30 deg bearing and its B (40 deg) sibling share the envelope; picking between them is a load-direction decision, not a quality upgrade.
- Never use a four-point or double-row bearing as a like-for-like swap for a single 7302 without re-checking axial float, heat and housing width — the kinematics differ.
- The 19,000 r/min speed figure assumes the catalogue lubrication state and a correctly set pair; real limits drop fast with excess grease fill or heavy preload.
- Grease rated for deep-groove motor duty is not automatically right at 19,000 r/min with preload; check the grease speed factor against the catalogue figure.
- The 14.9/7.2 kN ratings and 0.56 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 7302; internal geometry legitimately differs between manufacturers, so re-verify ratings, contact angle and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 7302?
7302 is a single-row angular contact ball bearing to ISO 15: 15 mm bore, 42 mm outside diameter, 13 mm width (0.591 x 1.654 x 0.512 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 14.9 kN, C0 7.2 kN and a 0.56 kN fatigue load limit Pu; the grease limiting speed is 19,000 r/min and the oil rating 26,000 r/min; mass about 55 g.
How is the 7302 designation structured?
73 is the single-row dimension series (heavy-duty 7300 single-row family); 02 encodes the 15 mm bore (bore code x 5); with no letter after the digits it is the standard 30 deg contact-angle execution — the 40 deg version carries a B. The 42 mm OD and 13 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 7302 support?
One 7302 alone takes thrust in one direction only, along its 30 deg contact angle; reversing thrust calls for a second bearing or a factory-matched DB/DF/DT pair (the catalogue right-hand columns list the paired ratings). Radial load is always carried as a combined load through the angled contact.
What lubrication speeds does NTN print for 7302?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 19,000 r/min and the oil rating 26,000 r/min. These are catalogue ceilings for a correctly mounted bearing with the stated lubricant; preload, fill quantity, ambient heat and paired arrangements all move the real limit.
What should be checked before substituting another make for 7302?
The 15/42/13 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 14.9 kN / C0 7.2 kN, the speed figures, contact angle and suffix meaning against the donor catalogue before swapping on a rated drive.
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.