BL208NSKBall

Name: NSK BL208 Ball Bearing
Brand: NSK
SKU: BL208

BL208 is a NSK ball bearing, bore 40 mm, O.D. 80 mm, width 18 mm, dynamic rating 9,380 lbs. Dimensions, drawing, interchanges and price.

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Bore d40mm

Outside dia. D80mm

Width B18mm

Dynamic Cr9,380lbs

Static C0r6,480lbs

Limiting speed8,000rpm

Weight0.395kg

Cr / C0r1.45

Mean dia. dm60mm

Original catalogue drawing - NSK catalogue, page 43

BL208 NSK Ball 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	40	1.5748
D	Outside diameter	80	3.1496
B	Inner-ring / bearing width	18	0.7087
r	Chamfer (min)	0.991	0.039

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)	40
Bore d (in)	1.5748
Outside dia. D (mm)	80
Outside dia. D (in)	3.1496
Width B (mm)	18
Width B (in)	0.7087

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	9380
Basic static load rating Cor (lbs)	6480
Limiting speed - grease (rpm)	8,000
Limiting speed - oil (rpm)	10,000

Weight

Weight (kg)	0.395

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.039
Shaft shoulder da min (in)	1.832
Shaft shoulder da max (in)	1.970
Housing shoulder Da max (in)	2.896

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,600 rpm
4	10,431	64	410
6	6,954	216	1,385
8	5,216	512	3,282
10	4,172	1,000	6,410
15	2,782	3,375	21,635

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 41,724 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.45 (dimensions) / p.46 (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
11208-TVH	FAG	Ball	40	80	18	19.4 kN	0.722
1208-K-TVH-C3	FAG	Ball	40	80	18	19.4 kN	0.408
1208-TVH	FAG	Ball	40	80	18	19.4 kN	0.414
6208	FAG	Ball	40	80	18	29 kN	0.372
6208-2RSR	FAG	Ball	40	80	18	29 kN	0.384
6208-2Z	FAG	Ball	40	80	18	29 kN	0.382
6208-C	FAG	Ball	40	80	18	31.5 kN	0.345
6208-C-2BRS	FAG	Ball	40	80	18	31.5 kN	0.359
6208-C-2HRS	FAG	Ball	40	80	18	31.5 kN	0.359
6208-C-2Z	FAG	Ball	40	80	18	31.5 kN	0.359

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1208	NSK	Ball	40	80	18	4,340 lbs	0.417
6208	NSK	Ball	40	80	18	6,550 lbs	0.372
7208B	NSK	Ball	40	80	18	6,830 lbs	0.381
208	NSK	Cylindrical Roller	40	80	18	9,790 lbs	0.386
NU208E	NSK	Cylindrical Roller	40	80	18	68.5 kN	0.379
HR30208	NSK	Tapered Roller	40	80	18	78 kN	0.437
HR30208C	NSK	Tapered Roller	40	80	18	24,100 lbs	0.424
HR30208J	NSK	Tapered Roller	40	80	18	14,300 lbs	0.44

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1208	NSK	Ball	40	80	18	4,340 lbs	0.417
1308	NSK	Ball	40	90	23	6,520 lbs	0.744
16008	NSK	Ball	40	68	9	13.9 kN	0.13
2208	NSK	Ball	40	80	23	7,080 lbs	0.49
2308	NSK	Ball	40	90	33	10,100 lbs	0.998
3208J	NSK	Ball	40	80	30.2	9,290 lbs	0.653
3308J	NSK	Ball	40	90	36.5	13,100 lbs	1.066
5208J	NSK	Ball	40	80	30.2	9,930 lbs	0.572

Request a quotation for BL208

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