QJ213 bearing: complete specifications & equivalents
The QJ213 is a ISO 15 radial bearing sized 65 x 120 x 23 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 65 mm |
| Outer diameter D | 120 mm |
| Width B | 23 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 93.5 kN |
| Basic static load rating C0 | 153 kN |
| Fatigue load limit Pu | 6.55 kN |
| Limiting speed (mechanical) | 4400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1240 g |
| Manufacturer designation | NTN QJ213 |
| 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 & QJ200-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 0.906 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in QJ200-series | 15 mm |
| Largest outer diameter in QJ200-series | 360 mm |
| Width range across QJ200-series | 11–58 mm |
| Bore position in QJ200-series (smallest first) | 11 of 29 |
| Bore above smallest QJ200-series size | 50 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the QJ213 model number is decoded
NTN QJ213 belongs to the medium-duty QJ200 four-point family: the catalogue boundary dimensions read 65 / 120 / 23 mm (bore / OD / width). Reading the code: QJ2 is the four-point dimension series (medium-duty QJ200 four-point family), the last two digits 13 give the bore by the standard code table (65 mm); there is no suffix — the split inner ring and 35 deg contact angle are inherent to the QJ design. The oil rating of 5,800 r/min sits 1,400 r/min above the 4,400 r/min grease figure — a 1.32x step that says how much headroom oil cooling buys. If the duty is mainly high speed with modest thrust, the 7900-series cross-section is the lighter alternative; if thrust dominates, the 7300-series section carries more. Grease quantity matters as much as grade at 4,400 r/min: fill about a third of the free space and let the bearing purge on first run.
Typical equipment & failure modes
Common applications
- crane and hoist gearbox shafts
- paper-machine roll and calendar drives
- extruder and mixer gearbox output shafts
- mining conveyor head-shaft positions
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
- thermal runaway from excessive preload: the pair runs hot, grease darkens and the contact ellipse spreads until the raceways smear
- machined-cage land scoring when a high-speed spindle runs past its grease rating and the cage runs dry on its guidance surface
- contamination-induced denting — hard particles rolled into the contact ellipse become the initiation points for surface fatigue
- edge loading and early spalling from housing bores that are out of round or shoulders that are too small for the ring face
Selection pitfalls — read before you substitute
- Bearings of 65 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 QJ split inner ring must be clamped by the shaft nut/shoulder on both halves — assembling it against a single small shoulder leaves one half-ring free to walk.
- The 4,400 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 4,400 r/min with preload; check the grease speed factor against the catalogue figure.
- Grease rated for deep-groove motor duty is not automatically right at 4,400 r/min with preload; check the grease speed factor against the catalogue figure.
- The 93.5/153 kN ratings and 6.55 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for QJ213; 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 QJ213?
QJ213 is a four-point contact ball bearing to ISO 15: 65 mm bore, 120 mm outside diameter, 23 mm width (2.559 x 4.724 x 0.906 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 93.5 kN, C0 153 kN and a 6.55 kN fatigue load limit Pu; the grease limiting speed is 4,400 r/min and the oil rating 5,800 r/min; mass about 1240 g.
How is the QJ213 designation structured?
QJ2 is the four-point dimension series (medium-duty QJ200 four-point family); the last two digits 13 give the bore by the standard code table (65 mm); there is no suffix — the split inner ring and 35 deg contact angle are inherent to the QJ design. The 120 mm OD and 23 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does QJ213 support?
QJ213 is a four-point contact bearing: the split inner ring lets each ball touch the raceways at two points, so one bearing locates the shaft in both axial directions at its 35 deg contact angle. It is normally mounted with slight radial clearance against the housing as the axial-locating member.
What lubrication speeds does NTN print for QJ213?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 4,400 r/min and the oil rating 5,800 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 QJ213?
The 65/120/23 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 93.5 kN / C0 153 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.