51230XNSKThrust

Name: NSK 51230X Thrust Bearing
Brand: NSK
SKU: 51230X

51230X is a NSK thrust bearing, bore 150 mm, O.D. 215 mm, height 50 mm, dynamic rating 53,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d150mm

Outside dia. D215mm

Overall width T50mm

Dynamic Cr53,600lbs

Static C0r165,000lbs

Limiting speed9,500rpm

Weight5.511kg

Cr / C0r0.32

Mean dia. dm182.5mm

Original catalogue drawing - NSK catalogue, page 147

51230X 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	150	5.9055
D	Outside diameter	215	8.4646
T	Overall assembly width	50	1.9685

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)	150
Bore d (in)	5.9055
Outside dia. D (mm)	215
Outside dia. D (in)	8.4646
Overall width T (mm)	50
Overall width T (in)	1.9685

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	53600
Basic static axial rating Coa (lbs)	165000
Limiting speed - grease (rpm)	9,500
Limiting speed - oil (rpm)	1,400

Weight

Weight (kg)	5.511

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.059
Shaft shoulder da min (in)	7.447
Housing shoulder Da (in)	6.934

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	59,606	102	564
6	39,737	392	2,181
8	29,803	1,024	5,689
10	23,842	2,154	11,969
15	15,895	8,323	46,241

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 238,425 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.

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51230	NSK	Thrust	150	215	50	238 kN	6.09

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
29330	NSK	Thrust	150	250	60	870 kN	-
29330E	NSK	Thrust	150	250	60	196,000 lbs	10.795
29430	NSK	Thrust	150	300	90	1580 kN	27.3
29430E	NSK	Thrust	150	300	90	355,000 lbs	27.216
51130	NSK	Thrust	150	190	31	110 kN	-
51130X	NSK	Thrust	150	190	31	24,700 lbs	1.941
51230	NSK	Thrust	150	215	50	238 kN	6.09
51330	NSK	Thrust	150	250	80	380 kN	17.3

Request a quotation for 51230X

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