7215-NTN bearing: complete specifications & equivalents
The 7215-NTN is a ISO 15 radial bearing sized 75 x 130 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 75 mm |
| Outer diameter D | 130 mm |
| Width B | 25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 87.5 kN |
| Basic static load rating C0 | 68.5 kN |
| Fatigue load limit Pu | 5.2 kN |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1170 g |
| Manufacturer designation | NTN 7215 |
| 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 & 7200-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 0.984 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in 7200-series | 10 mm |
| Largest outer diameter in 7200-series | 540 mm |
| Width range across 7200-series | 9–85 mm |
| Bore position in 7200-series (smallest first) | 16 of 36 |
| Bore above smallest 7200-series size | 65 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 7215-NTN model number is decoded
At 75 x 130 x 25 mm, NTN 7215 sits in the medium-duty 7200 single-row family of the angular-contact programme. The designation breaks down as 72 is the single-row dimension series (medium-duty 7200 single-row family); 15 encodes the 75 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. With C 87.5 kN and C0 68.5 kN, each mm of bore carries about 1.17 kN of dynamic rating. Size selection is usually finished by checking that the C0 of 68.5 kN covers the maximum static or shock condition with the catalogue safety factor, not only the running load. Shaft and housing shoulders must clear the ring corners yet support enough face — the catalogue abutment diameters for the 75 mm bore give the working limits.
Typical equipment & failure modes
Common applications
- marine auxiliary and winch gearbox shafts
- rolling-mill and metalworking drive shafts
- large pump, fan and compressor rotor shafts
- crane and hoist gearbox 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
- edge loading and early spalling from housing bores that are out of round or shoulders that are too small for the ring face
- lubricant starvation scoring at the ball/raceway contact when grease volume or relubrication interval is guessed instead of calculated
Selection pitfalls — read before you substitute
- Bearings of 75 mm bore arrive heavy enough that handling damage (dents from slings, tilting on the shaft) is a real failure precursor — use proper lifting and heating kit.
- 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.
- Catalogue mass and ratings belong to the open execution; shields, seals and resin cages change both the speed ceiling and the thermal behaviour of the same basic size.
- Grease rated for deep-groove motor duty is not automatically right at 5,300 r/min with preload; check the grease speed factor against the catalogue figure.
- On a 75 mm shaft, an interference fit eats internal clearance; skipping the clearance/preload recalculation is the classic cause of a new bearing running 20 deg C hotter than the drawing suggests.
- The 87.5/68.5 kN ratings and 5.2 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 7215; 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 7215?
7215 is a single-row angular contact ball bearing to ISO 15: 75 mm bore, 130 mm outside diameter, 25 mm width (2.953 x 5.118 x 0.984 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 87.5 kN, C0 68.5 kN and a 5.2 kN fatigue load limit Pu; the grease limiting speed is 5,300 r/min and the oil rating 7,100 r/min; mass about 1170 g.
How is the 7215 designation structured?
72 is the single-row dimension series (medium-duty 7200 single-row family); 15 encodes the 75 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 130 mm OD and 25 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 7215 support?
One 7215 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 7215?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 5,300 r/min and the oil rating 7,100 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 7215?
The 75/130/25 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 87.5 kN / C0 68.5 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.