51406NSKThrust

Name: NSK 51406 Thrust Bearing
Brand: NSK
SKU: 51406

51406 is a NSK thrust bearing, bore 30 mm, O.D. 70 mm, height 28 mm, dynamic rating 16,400 lbs. Dimensions, drawing, interchanges and price.

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Bore d30mm

Outside dia. D70mm

Overall width T28mm

Dynamic Cr16,400lbs

Static C0r28,200lbs

Limiting speed2,200rpm

Weight0.519kg

Cr / C0r0.58

Mean dia. dm50mm

Original catalogue drawing - NSK catalogue, page 143

51406 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	30	1.1811
D	Outside diameter	70	2.7559
T	Overall assembly width	28	1.1024

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)	30
Bore d (in)	1.1811
Outside dia. D (mm)	70
Outside dia. D (in)	2.7559
Overall width T (mm)	28
Overall width T (in)	1.1024

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	16400
Basic static axial rating Coa (lbs)	28200
Limiting speed - grease (rpm)	2,200
Limiting speed - oil (rpm)	3,400

Weight

Weight (kg)	0.519

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	2.128
Housing shoulder Da (in)	1.812

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 700 rpm
4	18,238	102	2,419
6	12,158	392	9,345
8	9,119	1,024	24,381
10	7,295	2,154	51,296
15	4,863	8,323	198,178

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 72,951 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.145 (dimensions) / p.146 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
51106	NSK	Thrust	30	47	11	4,630 lbs	0.064
51206	NSK	Thrust	30	52	16	6,610 lbs	0.137
51306	NSK	Thrust	30	60	21	9,700 lbs	0.267
52206	NSK	Thrust	30	52	None	29.5 kN	0.288
52306	NSK	Thrust	30	60	None	43 kN	0.511
51105	NSK	Thrust	25	42	11	4,430 lbs	0.056
51205	NSK	Thrust	25	47	15	6,300 lbs	0.111
51305	NSK	Thrust	25	52	18	8,040 lbs	0.169

Request a quotation for 51406

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