QJ216 bearing: complete specifications & equivalents
The QJ216 is a ISO 15 radial bearing sized 80 x 140 x 26 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 80 mm |
| Outer diameter D | 140 mm |
| Width B | 26 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 124 kN |
| Basic static load rating C0 | 217 kN |
| Fatigue load limit Pu | 8.65 kN |
| Limiting speed (mechanical) | 3500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1830 g |
| Manufacturer designation | NTN QJ216 |
| 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 | 3.15 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.024 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 30 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) | 14 of 29 |
| Bore above smallest QJ200-series size | 65 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the QJ216 model number is decoded
QJ216 is the 80 mm bore member of NTN's medium-duty QJ200 four-point family, with a 140 mm outside diameter and 26 mm section width. NTN builds the number from QJ2 is the four-point dimension series (medium-duty QJ200 four-point family), then the last two digits 16 give the bore by the standard code table (80 mm); there is no suffix — the split inner ring and 35 deg contact angle are inherent to the QJ design. NTN prints 124 kN dynamic and 217 kN static for this size and a 8.65 kN fatigue load limit Pu. When axial load reverses, specify the bearing as a matched pair (DB, DF or DT) instead of two random singles — the catalogue right-hand columns give the paired ratings for exactly this reason. 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
- large pump, fan and compressor rotor shafts
- crane and hoist gearbox shafts
- paper-machine roll and calendar drives
- extruder and mixer gearbox output shafts
Known failure patterns
- false brinelling on the raceway contact ellipses when a preloaded spindle sits vibrating at standstill — visible as evenly spaced flute-like wear at ball pitch
- loss of preload after housing-fret or shaft creep, leaving the pair loose — ball skidding, cage rattle and a falling natural frequency follow
- machined-cage land scoring when a high-speed spindle runs past its grease rating and the cage runs dry on its guidance surface
- edge loading and early spalling from housing bores that are out of round or shoulders that are too small for the ring face
- flaking that starts at the raceway shoulder on the thrust-loaded side when axial load repeatedly exceeds the design share
Selection pitfalls — read before you substitute
- Bearings of 80 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 C0 of 217 kN is a static rating, not a permissible running thrust — sizing continuous axial load from C0 alone is a recurring drawing-office error.
- 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.
- Never use a four-point or double-row bearing as a like-for-like swap for a single QJ216 without re-checking axial float, heat and housing width — the kinematics differ.
- The 124/217 kN ratings and 8.65 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for QJ216; 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 QJ216?
QJ216 is a four-point contact ball bearing to ISO 15: 80 mm bore, 140 mm outside diameter, 26 mm width (3.15 x 5.512 x 1.024 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 124 kN, C0 217 kN and a 8.65 kN fatigue load limit Pu; the grease limiting speed is 3,500 r/min and the oil rating 4,700 r/min; mass about 1830 g.
How is the QJ216 designation structured?
QJ2 is the four-point dimension series (medium-duty QJ200 four-point family); the last two digits 16 give the bore by the standard code table (80 mm); there is no suffix — the split inner ring and 35 deg contact angle are inherent to the QJ design. The 140 mm OD and 26 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does QJ216 support?
QJ216 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 QJ216?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 3,500 r/min and the oil rating 4,700 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 QJ216?
The 80/140/26 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 124 kN / C0 217 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.