6838NSKBall

Name: NSK 6838 Ball Bearing
Brand: NSK
SKU: 6838

6838 is a NSK ball bearing, bore 190 mm, O.D. 240 mm, width 24 mm, dynamic rating 16,400 lbs. Dimensions, drawing, interchanges and price.

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Bore d190mm

Outside dia. D240mm

Width B24mm

Dynamic Cr16,400lbs

Static C0r21,000lbs

Limiting speed2,200rpm

Weight2.527kg

Cr / C0r0.78

Mean dia. dm215mm

Original catalogue drawing - NSK catalogue, page 21

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	190	7.4803
D	Outside diameter	240	9.4488
B	Inner-ring / bearing width	24	0.9449
r	Chamfer (min)	1.499	0.059

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)	190
Bore d (in)	7.4803
Outside dia. D (mm)	240
Outside dia. D (in)	9.4488
Width B (mm)	24
Width B (in)	0.9449

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	16400
Basic static load rating Cor (lbs)	21000
Limiting speed - grease (rpm)	2,200
Limiting speed - oil (rpm)	2,600
Factor f0	17.1

Weight

Weight (kg)	2.527

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.059
Shaft shoulder da min (in)	7.795
Shaft shoulder da max (in)	7.972
Housing shoulder Da max (in)	9.134

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 700 rpm
4	18,238	64	1,524
6	12,158	216	5,143
8	9,119	512	12,190
10	7,295	1,000	23,810
15	4,863	3,375	80,357

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 72,951 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.23 (dimensions) / p.24 (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
61838	FAG	Ball	190	240	24	73 kN	2.24

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
NCF1838V	NSK	Cylindrical Roller	190	240	24	219 kN	2.4

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16038	NSK	Ball	190	290	31	164 kN	7.78
6038	NSK	Ball	190	290	46	42,300 lbs	11.113
6238	NSK	Ball	190	340	55	57,300 lbs	22.153
6338	NSK	Ball	190	400	78	79,700 lbs	50.802
6938	NSK	Ball	190	260	33	25,300 lbs	5.13
7238B	NSK	Ball	190	340	55	63,700 lbs	21.319
7338B	NSK	Ball	190	400	78	92,600 lbs	47.174

Request a quotation for 6838

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