51120NSKThrust

Name: NSK 51120 Thrust Bearing
Brand: NSK
SKU: 51120

51120 is a NSK thrust bearing, bore 100 mm, O.D. 135 mm, height 25 mm, dynamic rating 19,300 lbs. Dimensions, drawing, interchanges and price.

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Bore d100mm

Outside dia. D135mm

Overall width T25mm

Dynamic Cr19,300lbs

Static C0r60,200lbs

Limiting speed1,700rpm

Weight0.962kg

Cr / C0r0.32

Mean dia. dm117.5mm

Original catalogue drawing - NSK catalogue, page 147

51120 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	135	5.315
T	Overall assembly width	25	0.9843

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)	135
Outside dia. D (in)	5.3150
Overall width T (mm)	25
Overall width T (in)	0.9843

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	19300
Basic static axial rating Coa (lbs)	60200
Limiting speed - grease (rpm)	1,700
Limiting speed - oil (rpm)	2,600

Weight

Weight (kg)	0.962

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	4.767
Housing shoulder Da (in)	4.492

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	21,463	102	3,386
6	14,308	392	13,083
8	10,731	1,024	34,133
10	8,585	2,154	71,814
15	5,723	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 85,851 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
51220	NSK	Thrust	100	150	38	30,200 lbs	2.25
51320	NSK	Thrust	100	170	55	53,600 lbs	4.98
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 51120

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