51218NSKThrust

Name: NSK 51218 Thrust Bearing
Brand: NSK
SKU: 51218

51218 is a NSK thrust bearing, bore 90 mm, O.D. 135 mm, height 35 mm, dynamic rating 25,600 lbs. Dimensions, drawing, interchanges and price.

Request a quote WhatsApp Email us Search the catalog

Bore d90mm

Outside dia. D135mm

Overall width T35mm

Dynamic Cr25,600lbs

Static C0r69,400lbs

Limiting speed1,400rpm

Weight1.692kg

Cr / C0r0.37

Mean dia. dm112.5mm

Original catalogue drawing - NSK catalogue, page 147

51218 NSK Thrust bearing catalogue drawing

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	90	3.5433
D	Outside diameter	135	5.315
T	Overall assembly width	35	1.378

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)	90
Bore d (in)	3.5433
Outside dia. D (mm)	135
Outside dia. D (in)	5.3150
Overall width T (mm)	35
Overall width T (in)	1.3780

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	25600
Basic static axial rating Coa (lbs)	69400
Limiting speed - grease (rpm)	1,400
Limiting speed - oil (rpm)	2,200

Weight

Weight (kg)	1.692

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	4.610
Housing shoulder Da (in)	4.255

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 400 rpm
4	28,469	102	4,233
6	18,979	392	16,354
8	14,234	1,024	42,667
10	11,387	2,154	89,768
15	7,592	8,323	346,811

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 113,874 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	NSK
Source catalogue	NSK inch product catalogue
Catalogue page	p.149 (dimensions) / p.150 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
29318E	NSK	Thrust	90	150	39	78,500 lbs	2.835
29418E	NSK	Thrust	90	190	60	156,000 lbs	7.53
51118	NSK	Thrust	90	120	22	13,600 lbs	0.644
51318	NSK	Thrust	90	155	50	48,300 lbs	3.828
51418	NSK	Thrust	90	190	77	330 kN	10.3
51418X	NSK	Thrust	90	190	77	73,900 lbs	10.201
52318	NSK	Thrust	90	155	None	214 kN	7.33
52418	NSK	Thrust	90	190	None	330 kN	18.1

Request a quotation for 51218

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.

Online enquiry form richard@bearingsfit.com WhatsApp +86 156 2149 6516