6340NSKBall

Name: NSK 6340 Ball Bearing
Brand: NSK
SKU: 6340

6340 is a NSK ball bearing, bore 200 mm, O.D. 420 mm, width 80 mm, dynamic rating 85,300 lbs. Dimensions, drawing, interchanges and price.

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Bore d200mm

Outside dia. D420mm

Width B80mm

Dynamic Cr85,300lbs

Static C0r100,400lbs

Limiting speed1,300rpm

Weight57.606kg

Cr / C0r0.85

Mean dia. dm310mm

Original catalogue drawing - NSK catalogue, page 19

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	200	7.874
D	Outside diameter	420	16.5354
B	Inner-ring / bearing width	80	3.1496
r	Chamfer (min)	3.988	0.157

Notes

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)	200
Bore d (in)	7.8740
Outside dia. D (mm)	420
Outside dia. D (in)	16.5354
Width B (mm)	80
Width B (in)	3.1496

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	85300
Basic static load rating Cor (lbs)	100400
Limiting speed - grease (rpm)	1,300
Limiting speed - oil (rpm)	1,600
Factor f0	13.8

Weight

Weight (kg)	57.606

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.157
Shaft shoulder da min (in)	8.740
Shaft shoulder da max (in)	-
Housing shoulder Da max (in)	15.669

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 400 rpm
4	94,858	64	2,667
6	63,239	216	9,000
8	47,429	512	21,333
10	37,943	1,000	41,667
15	25,296	3,375	140,625

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 379,433 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.21 (dimensions) / p.22 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6340-M	FAG	Ball	200	420	80	380 kN	56.6
NJ340-E-M1	FAG	Cylindrical Roller	200	420	80	1180 kN	58.1
NJ340-E-TB-M1	FAG	Cylindrical Roller	200	420	80	1180 kN	58.1
NU340-E-M1	FAG	Cylindrical Roller	200	420	80	1180 kN	57.3
NU340-E-TB-M1	FAG	Cylindrical Roller	200	420	80	1180 kN	57.3
30340	FAG	Tapered Roller	200	420	80	1300 kN	52.7

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
7340B	NSK	Ball	200	420	80	97,000 lbs	53.07
340	NSK	Cylindrical Roller	200	420	80	219,000 lbs	56.245
NU340E	NSK	Cylindrical Roller	200	420	80	1400 kN	57.1
30340	NSK	Tapered Roller	200	420	80	232,000 lbs	52.308
7340	NSK	Precision / Angular Contact	200	420	80	520 kN	54.4

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16040	NSK	Ball	200	310	34	177 kN	10
6040	NSK	Ball	200	310	51	46,500 lbs	14.061
6240	NSK	Ball	200	360	58	296 kN	26.7
6840	NSK	Ball	200	250	24	16,600 lbs	2.654
6940	NSK	Ball	200	280	38	32,100 lbs	7.176
7240B	NSK	Ball	200	360	58	68,300 lbs	25.31
7340B	NSK	Ball	200	420	80	97,000 lbs	53.07

Request a quotation for 6340

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