BL318NSKBall

Name: NSK BL318 Ball Bearing
Brand: NSK
SKU: BL318

BL318 is a NSK ball bearing, bore 90 mm, O.D. 190 mm, width 43 mm, dynamic rating 42,000 lbs. Dimensions, drawing, interchanges and price.

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Bore d90mm

Outside dia. D190mm

Width B43mm

Dynamic Cr42,000lbs

Static C0r36,200lbs

Limiting speed3,600rpm

Weight5.371kg

Cr / C0r1.16

Mean dia. dm140mm

Original catalogue drawing - NSK catalogue, page 43

BL318 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	90	3.5433
D	Outside diameter	190	7.4803
B	Inner-ring / bearing width	43	1.6929
r	Chamfer (min)	2.515	0.099

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)	90
Bore d (in)	3.5433
Outside dia. D (mm)	190
Outside dia. D (in)	7.4803
Width B (mm)	43
Width B (in)	1.6929

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	42000
Basic static load rating Cor (lbs)	36200
Limiting speed - grease (rpm)	3,600
Limiting speed - oil (rpm)	4,300

Weight

Weight (kg)	5.371

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.099
Shaft shoulder da min (in)	4.058
Shaft shoulder da max (in)	4.610
Housing shoulder Da max (in)	6.974

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 1,200 rpm
4	46,706	64	889
6	31,138	216	3,000
8	23,353	512	7,111
10	18,683	1,000	13,889
15	12,455	3,375	46,875

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 186,825 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
1318-K-M-C3	FAG	Ball	90	190	43	109 kN	6.27
1318-M	FAG	Ball	90	190	43	109 kN	6.35
6318	FAG	Ball	90	190	43	142 kN	5.43
6318-2RSR	FAG	Ball	90	190	43	142 kN	5.396
6318-2Z	FAG	Ball	90	190	43	142 kN	5.53
QJ318-N2-MPA	FAG	Ball	90	190	43	265 kN	6.31
N318-E-M1	FAG	Cylindrical Roller	90	190	43	370 kN	6.19
N318-E-XL-M1	FAG	Cylindrical Roller	90	190	43	370 kN	6.19
NJ318-E-TVP2	FAG	Cylindrical Roller	90	190	43	370 kN	5.49
NJ318-E-XL-TVP2	FAG	Cylindrical Roller	90	190	43	370 kN	5.49

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1318	NSK	Ball	90	190	43	129 kN	5.83
6318	NSK	Ball	90	190	43	32,100 lbs	4.899
7318B	NSK	Ball	90	190	43	33,100 lbs	5.851
318	NSK	Cylindrical Roller	90	190	43	53,900 lbs	5.443
NU318	NSK	Cylindrical Roller	90	190	43	295 kN	5.38
NU318E	NSK	Cylindrical Roller	90	190	43	390 kN	6.1
21318EAE4	NSK	Spherical Roller	90	190	43	415 kN	6.1
HR30318	NSK	Tapered Roller	90	190	43	325 kN	5.52

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1218	NSK	Ball	90	160	30	63 kN	2.56
1318	NSK	Ball	90	190	43	129 kN	5.83
16018	NSK	Ball	90	140	16	45.5 kN	0.873
6018	NSK	Ball	90	140	24	13,100 lbs	1.161
6218	NSK	Ball	90	160	30	21,600 lbs	2.15
6318	NSK	Ball	90	190	43	32,100 lbs	4.899
6818	NSK	Ball	90	115	13	4,270 lbs	0.268
6918	NSK	Ball	90	125	18	7,370 lbs	0.567

Request a quotation for BL318

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