51192 bearing: complete specifications & equivalents
The 51192 is a ISO 104 radial bearing sized 460 x 560 x 80 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 460 mm |
| Outer diameter D | 560 mm |
| Width B | 80 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Basic dynamic load rating C | 525 kN |
| Basic static load rating C0 | 3000 kN |
| Fatigue load limit Pu | 60 kN |
| Limiting speed (mechanical) | 390 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 41600 g |
| Manufacturer designation | NTN 51192 |
| Standard | ISO 104 |
| 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 & 51100-series range
| Bore d | 18.11 in |
|---|---|
| Outer diameter D | 22.047 in |
| Width B | 3.15 in |
| ISO bore code | 92 |
| Radial section height (D−d)/2 | 50 mm |
| Smallest bore in 51100-series | 10 mm |
| Largest outer diameter in 51100-series | 640 mm |
| Width range across 51100-series | 9–85 mm |
| Bore position in 51100-series (smallest first) | 43 of 46 |
| Bore above smallest 51100-series size | 450 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 51192 model number is decoded
At 460 x 560 x 80 mm, NTN 51192 sits in the light-section 51100 thrust family of the single-direction thrust programme. The designation is 511 is the dimension series (light-section 51100 thrust family) plus 92 encodes the 460 mm bore (bore code x 5). Because the contact points run at 90 deg to the shaft, none of the rating is available for radial load — not even incidentally. Selection starts from the load direction: if thrust ever reverses, plan a second thrust bearing (or a double-direction execution) rather than relying on the unloaded raceway. The shaft washer (bore 460 mm, tight on the shaft) and the housing washer (slightly looser bore) are not interchangeable — check the catalogue bore codes before pressing anything on.
Typical equipment & failure modes
Common applications
- heavy press and mill screwdown thrust seats
- crane slew-ring auxiliary thrust positions
- large mixer and reactor vertical shafts
- bulk-handler stacker/reclaimer thrust pivots
Known failure patterns
- cage pocket wear and ball skid polish after long running below the minimum axial load, the balls sliding instead of rolling on the washers
- housing-washer rocking on an out-of-square support face, seen as uneven wear around the raceway circle and rising running torque
- rapid flaking after radial load was allowed onto the bearing — a single-direction thrust ball bearing carries axial load only
- lubricant starvation scoring on the raceway track when grease is thrown outward by centrifugal effect and never replaced
- contamination pitting from particles settling on the horizontal housing washer — the classic failure of vertical-shaft grease-lubricated seats
Selection pitfalls — read before you substitute
- For a 460 mm bore thrust bearing, the seating surfaces and oil supply decide service life; at this size a field-improvised housing is the usual root cause behind "premature" failures.
- The 511 light section is the speed-friendly end of the thrust-ball plan — for the same 460 mm bore it gives up load to gain OD, height and limiting-speed headroom.
- Do not reuse a thrust bearing to "absorb" shaft thermal growth — the bearing clamps axially, so growth must be handled on the radial-bearing side of the arrangement.
- A housing washer pressed tight in its seat cannot self-centre; the resulting eccentric running shows up as cage wear long before raceway fatigue.
- Single-direction means exactly that: thrust on 51192 in the wrong direction separates the washers and drops the ball set — if reversal is possible even during coast-down, engineer against it.
- The Ca 525/C0a 3000 kN ratings and 60 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 51192; raceway geometry legitimately differs between manufacturers, so re-verify ratings and washer identification before substituting another make.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 51192?
51192 is a single-direction thrust ball bearing to ISO 104: 460 mm shaft-washer bore, 560 mm outside diameter, 80 mm stack height (18.11 x 22.047 x 3.15 in). From NTN Ball and Roller Bearings CAT.No.2203E: axial Ca 525 kN, C0a 3000 kN and a 60 kN fatigue load limit Pu; the grease limiting speed is 390 r/min and the oil rating 560 r/min; mass about 41600 g.
How is the 51192 designation structured?
511 is the dimension series (light-section 51100 thrust family); 92 encodes the 460 mm bore (bore code x 5). The 560 mm OD and 80 mm height follow the ISO 104 boundary plan for that series.
Can 51192 carry radial load or reversing thrust?
No. The raceways contact the balls at 90 deg to the shaft, so the rating is purely axial and single-direction. Radial load must be carried by a separate radial bearing, and reversing thrust needs a second thrust bearing or a double-direction execution.
Why does NTN specify a minimum axial load for 51192?
At the 390 r/min class speed, centrifugal and gyroscopic effects make an under-loaded ball set skid and smear instead of roll. The catalogue minimum-load formula gives the axial preload — from the machine weight, springs or a dead-weight — that keeps the contact rolling.
What should be checked before substituting another make for 51192?
The 460/560/80 mm envelope is ISO 104 interchangeable, but washer bore codes, raceway osculation and ratings are maker-specific. Re-verify Ca 525 kN / C0a 3000 kN, the speed figures and the shaft/housing washer identification against the donor catalogue.
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.