51104NSKThrust

Name: NSK 51104 Thrust Bearing
Brand: NSK
SKU: 51104

51104 is a NSK thrust bearing, bore 20 mm, O.D. 35 mm, height 10 mm, dynamic rating 3,390 lbs. Dimensions, drawing, interchanges and price.

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Bore d20mm

Outside dia. D35mm

Overall width T10mm

Dynamic Cr3,390lbs

Static C0r5,970lbs

Limiting speed5,300rpm

Weight0.037kg

Cr / C0r0.57

Mean dia. dm27.5mm

Original catalogue drawing - NSK catalogue, page 143

51104 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	20	0.7874
D	Outside diameter	35	1.378
T	Overall assembly width	10	0.3937

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)	20
Bore d (in)	0.7874
Outside dia. D (mm)	35
Outside dia. D (in)	1.3780
Overall width T (mm)	10
Overall width T (in)	0.3937

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	3390
Basic static axial rating Coa (lbs)	5970
Limiting speed - grease (rpm)	5,300
Limiting speed - oil (rpm)	8,000

Weight

Weight (kg)	0.037

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.012
Shaft shoulder da min (in)	1.143
Housing shoulder Da (in)	1.024

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,700 rpm
4	3,770	102	996
6	2,513	392	3,848
8	1,885	1,024	10,039
10	1,508	2,154	21,122
15	1,005	8,323	81,603

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 15,079 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
51204	NSK	Thrust	20	40	14	5,040 lbs	0.077
52204	NSK	Thrust	20	40	None	22.5 kN	0.151
51103	NSK	Thrust	17	30	9	2,570 lbs	0.025
51203	NSK	Thrust	17	35	12	3,880 lbs	0.05
51102	NSK	Thrust	15	28	9	2,380 lbs	0.23
51202	NSK	Thrust	15	32	12	3,770 lbs	0.043
52202	NSK	Thrust	15	32	None	16.7 kN	0.09
51105	NSK	Thrust	25	42	11	4,430 lbs	0.056

Request a quotation for 51104

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