51320NSKThrust

Name: NSK 51320 Thrust Bearing
Brand: NSK
SKU: 51320

51320 is a NSK thrust bearing, bore 100 mm, O.D. 170 mm, height 55 mm, dynamic rating 53,600 lbs. Dimensions, drawing, interchanges and price.

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Bore d100mm

Outside dia. D170mm

Overall width T55mm

Dynamic Cr53,600lbs

Static C0r134,000lbs

Limiting speed1,000rpm

Weight4.98kg

Cr / C0r0.4

Mean dia. dm135mm

Original catalogue drawing - NSK catalogue, page 147

51320 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	100	3.937
D	Outside diameter	170	6.6929
T	Overall assembly width	55	2.1654

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)	100
Bore d (in)	3.9370
Outside dia. D (mm)	170
Outside dia. D (in)	6.6929
Overall width T (mm)	55
Overall width T (in)	2.1654

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	53600
Basic static axial rating Coa (lbs)	134000
Limiting speed - grease (rpm)	1,000
Limiting speed - oil (rpm)	1,500

Weight

Weight (kg)	4.98

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.059
Shaft shoulder da min (in)	5.595
Housing shoulder Da (in)	5.043

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 300 rpm
4	59,606	102	5,644
6	39,737	392	21,805
8	29,803	1,024	56,889
10	23,842	2,154	119,691
15	15,895	8,323	462,415

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.

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
29320	NSK	Thrust	100	170	42	410 kN	3.6
29320E	NSK	Thrust	100	170	42	92,000 lbs	3.606
29420	NSK	Thrust	100	210	67	840 kN	10.3
29420E	NSK	Thrust	100	210	67	189,000 lbs	10.297
51120	NSK	Thrust	100	135	25	19,300 lbs	0.962
51220	NSK	Thrust	100	150	38	30,200 lbs	2.25
51420X	NSK	Thrust	100	210	85	83,800 lbs	14.801
52220	NSK	Thrust	100	150	None	135 kN	4.54

Request a quotation for 51320

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