51109NSKThrust

Name: NSK 51109 Thrust Bearing
Brand: NSK
SKU: 51109

51109 is a NSK thrust bearing, bore 45 mm, O.D. 65 mm, height 14 mm, dynamic rating 6,300 lbs. Dimensions, drawing, interchanges and price.

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Bore d45mm

Outside dia. D65mm

Overall width T14mm

Dynamic Cr6,300lbs

Static C0r15,500lbs

Limiting speed3,400rpm

Weight0.142kg

Cr / C0r0.41

Mean dia. dm55mm

Original catalogue drawing - NSK catalogue, page 143

51109 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	45	1.7717
D	Outside diameter	65	2.5591
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)	45
Bore d (in)	1.7717
Outside dia. D (mm)	65
Outside dia. D (in)	2.5591
Overall width T (mm)	14
Overall width T (in)	0.5512

Load ratings & speeds

Basic dynamic axial rating Ca (lbs)	6300
Basic static axial rating Coa (lbs)	15500
Limiting speed - grease (rpm)	3,400
Limiting speed - oil (rpm)	5,000

Weight

Weight (kg)	0.142

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.024
Shaft shoulder da min (in)	2.246
Housing shoulder Da (in)	2.088

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,100 rpm
4	7,006	102	1,539
6	4,671	392	5,947
8	3,503	1,024	15,515
10	2,802	2,154	32,643
15	1,868	8,323	126,113

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 28,024 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
51209	NSK	Thrust	45	73	20	10,800 lbs	0.31
51309	NSK	Thrust	45	85	28	18,000 lbs	0.672
51409	NSK	Thrust	45	100	39	28,600 lbs	1.46
52209	NSK	Thrust	45	73	None	48 kN	0.652
52309	NSK	Thrust	45	85	None	80.5 kN	1.34
52409	NSK	Thrust	45	100	None	128 kN	2.85
51108	NSK	Thrust	40	60	13	6,100 lbs	0.12
51208	NSK	Thrust	40	68	19	10,600 lbs	0.27

Request a quotation for 51109

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