7919 bearing: complete specifications & equivalents
The 7919 is a ISO 15 radial bearing sized 95 x 130 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 95 mm |
| Outer diameter D | 130 mm |
| Width B | 18 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 41.5 kN |
| Basic static load rating C0 | 40.5 kN |
| Fatigue load limit Pu | 2.54 kN |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 688 g |
| Manufacturer designation | NTN 7919 |
| 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 & 7900-series range
| Bore d | 3.74 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 0.709 in |
| ISO bore code | 19 |
| Radial section height (D−d)/2 | 17.5 mm |
| Smallest bore in 7900-series | 25 mm |
| Largest outer diameter in 7900-series | 420 mm |
| Width range across 7900-series | 9–56 mm |
| Bore position in 7900-series (smallest first) | 15 of 32 |
| Bore above smallest 7900-series size | 70 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 7919 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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 7919 model number is decoded
At 95 x 130 x 18 mm, NTN 7919 sits in the extra-light, high-speed 7900 single-row family of the angular-contact programme. Two fields make up the code — 79 is the single-row dimension series (extra-light, high-speed 7900 single-row family) and 19 encodes the 95 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. At roughly 17.5 mm of radial section, the catalogue still quotes 41.5 kN dynamic capacity for the 95 mm bore. Size selection is usually finished by checking that the C0 of 40.5 kN covers the maximum static or shock condition with the catalogue safety factor, not only the running load. After mounting, check axial float or preload with a dial gauge on the shaft end — the specification, not hand feel, decides whether the contact angle works as rated.
Typical equipment & failure modes
Common applications
- extruder and mixer gearbox output shafts
- mining conveyor head-shaft positions
- marine auxiliary and winch gearbox shafts
- rolling-mill and metalworking drive 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
- resin-cage cracking on the 7900-series sizes after hot, dry running or solvent attack on the polymer
- edge loading and early spalling from housing bores that are out of round or shoulders that are too small for the ring face
- contamination-induced denting — hard particles rolled into the contact ellipse become the initiation points for surface fatigue
Selection pitfalls — read before you substitute
- Bearings of 95 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 7900 extra-light section is chosen for speed and stiffness, not for load margin — check that C0 40.5 kN really covers the worst static case before substituting it for a 7000.
- If the application vibrates at standstill (transport, idle machine next to a running line), specify protection: the contact ellipse of a preloaded bearing false-brinells faster than a loose one.
- Never use a four-point or double-row bearing as a like-for-like swap for a single 7919 without re-checking axial float, heat and housing width — the kinematics differ.
- 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.
- The 41.5/40.5 kN ratings and 2.54 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 7919; 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 7919?
7919 is a single-row angular contact ball bearing to ISO 15: 95 mm bore, 130 mm outside diameter, 18 mm width (3.74 x 5.118 x 0.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 41.5 kN, C0 40.5 kN and a 2.54 kN fatigue load limit Pu; the grease limiting speed is 5,000 r/min and the oil rating 6,600 r/min; mass about 688 g.
How is the 7919 designation structured?
79 is the single-row dimension series (extra-light, high-speed 7900 single-row family); 19 encodes the 95 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 18 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 7919 support?
One 7919 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 7919?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 5,000 r/min and the oil rating 6,600 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 7919?
The 95/130/18 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 41.5 kN / C0 40.5 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.