51148NSKThrust
51148 is a NSK thrust bearing, bore 240 mm, O.D. 300 mm, height 45 mm, dynamic rating 229 kN. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK E1103, page 318
Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.
Scale cross-section
Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.
Dimension table (mm / inch)
| Symbol | Dimension | mm | inch |
|---|---|---|---|
| d | Bore diameter | 240 | 9.4488 |
| D | Outside diameter | 300 | 11.811 |
| T | Overall assembly width | 45 | 1.7717 |
| r | Chamfer (min) | 1.5 | 0.0591 |
Notes
Thrust bearing ratings are axial values Ca / Coa; T is the overall height. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.
Main dimensions
| Bore d (mm) | 240 |
|---|---|
| Outside dia. D (mm) | 300 |
| Overall width T (mm) | 45 |
Load ratings & speeds
| Basic dynamic axial rating Ca (lbs) | 51481 |
|---|---|
| Basic static axial rating Coa (lbs) | 210196 |
| Basic dynamic axial rating Ca (N) | 229000 |
| Basic static axial rating C0a (N) | 935000 |
| Limiting speed - grease (rpm) | 850 |
| Limiting speed - oil (rpm) | 1,200 |
Mounting dimensions (fillets / shoulders)
| Housing fillet r max (mm) | 1.5 |
|---|
Bearing life (ISO 281 basic rating life)
| C / P | Equivalent load P (N) | L10 (106 rev) | L10h at 200 rpm |
|---|---|---|---|
| 4 | 57,250 | 102 | 8,466 |
| 6 | 38,167 | 392 | 32,708 |
| 8 | 28,625 | 1,024 | 85,333 |
| 10 | 22,900 | 2,154 | 179,536 |
| 15 | 15,267 | 8,323 | 693,622 |
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 229,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
| Brand | NSK |
|---|---|
| Source catalogue | NSK CAT. No. E1103 (metric) |
| Catalogue page | p.318 (dimensions) |
Load ratings in newtons, weights in kg, limiting speeds for grease and oil lubrication.
Nearby bore sizes
| Designation | Brand | Type | d | D | B/T | Dyn. rating | kg |
|---|---|---|---|---|---|---|---|
| 29248 | NSK | Thrust | 240 | 340 | 60 | 180,000 lbs | 16.783 |
| 29348 | NSK | Thrust | 240 | 380 | 85 | 305,000 lbs | 35.834 |
| 29448 | NSK | Thrust | 240 | 440 | 122 | 545,000 lbs | 78.925 |
| 51248 | NSK | Thrust | 240 | 340 | 78 | 420 kN | 25.6 |
Request a quotation for 51148
Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.