51204NSKThrust

Name: NSK 51204 Thrust Bearing
Brand: NSK
SKU: 51204

51204 is a NSK thrust bearing, bore 20 mm, O.D. 40 mm, height 14 mm, dynamic rating 5,040 lbs. Dimensions, drawing, interchanges and price.

Request a quote WhatsApp Email us Search the catalog

Bore d20mm

Outside dia. D40mm

Overall width T14mm

Dynamic Cr5,040lbs

Static C0r8,480lbs

Limiting speed4,300rpm

Weight0.077kg

Cr / C0r0.59

Mean dia. dm30mm

Original catalogue drawing - NSK catalogue, page 143

51204 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	40	1.5748
T	Overall assembly width	14	0.5512

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)	40
Outside dia. D (in)	1.5748
Overall width T (mm)	14
Overall width T (in)	0.5512

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	5040
Basic static axial rating Coa (lbs)	8480
Limiting speed - grease (rpm)	4,300
Limiting speed - oil (rpm)	6,300

Weight

Weight (kg)	0.077

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.024
Shaft shoulder da min (in)	1.261
Housing shoulder Da (in)	1.103

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,400 rpm
4	5,605	102	1,209
6	3,737	392	4,673
8	2,802	1,024	12,190
10	2,242	2,154	25,648
15	1,495	8,323	99,089

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 22,419 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
51104	NSK	Thrust	20	35	10	3,390 lbs	0.037
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 51204

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

Online enquiry form richard@bearingsfit.com WhatsApp +86 156 2149 6516