51210NSKThrust

Name: NSK 51210 Thrust Bearing
Brand: NSK
SKU: 51210

51210 is a NSK thrust bearing, bore 50 mm, O.D. 78 mm, height 22 mm, dynamic rating 11,000 lbs. Dimensions, drawing, interchanges and price.

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Bore d50mm

Outside dia. D78mm

Overall width T22mm

Dynamic Cr11,000lbs

Static C0r25,100lbs

Limiting speed2,400rpm

Weight0.376kg

Cr / C0r0.44

Mean dia. dm64mm

Original catalogue drawing - NSK catalogue, page 145

51210 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	50	1.9685
D	Outside diameter	78	3.0709
T	Overall assembly width	22	0.8661

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)	50
Bore d (in)	1.9685
Outside dia. D (mm)	78
Outside dia. D (in)	3.0709
Overall width T (mm)	22
Overall width T (in)	0.8661

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	11000
Basic static axial rating Coa (lbs)	25100
Limiting speed - grease (rpm)	2,400
Limiting speed - oil (rpm)	3,600

Weight

Weight (kg)	0.376

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	2.640
Housing shoulder Da (in)	2.403

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 800 rpm
4	12,233	102	2,117
6	8,155	392	8,177
8	6,116	1,024	21,333
10	4,893	2,154	44,884
15	3,262	8,323	173,406

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 48,930 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.147 (dimensions) / p.148 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51110	NSK	Thrust	50	70	14	6,530 lbs	0.154
51310	NSK	Thrust	50	95	31	21,900 lbs	0.93
51410	NSK	Thrust	50	110	43	33,100 lbs	1.941
52310	NSK	Thrust	50	95	None	97.5 kN	1.94
52410	NSK	Thrust	50	110	None	147 kN	3.59
51109	NSK	Thrust	45	65	14	6,300 lbs	0.142
51209	NSK	Thrust	45	73	20	10,800 lbs	0.31
51309	NSK	Thrust	45	85	28	18,000 lbs	0.672

Request a quotation for 51210

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