QJ318-N2-MPAFAGBall

Name: FAG QJ318-N2-MPA Ball Bearing
Brand: FAG
SKU: QJ318-N2-MPA

QJ318-N2-MPA is a FAG ball bearing, bore 90 mm, O.D. 190 mm, width 43 mm, dynamic rating 265 kN. Dimensions, drawing, interchanges and price.

Brass cage

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Bore d90mm

Outside dia. D190mm

Width B43mm

Dynamic Cr265kN

Static C0r285kN

Limiting speed6,300rpm

Weight6.31kg

Cr / C0r0.93

Mean dia. dm140mm

Original catalogue drawing - FAG Schaeffler HR 1, page 364

QJ318-N2-MPA FAG 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)	3	0.1181

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
Outside dia. D (mm)	190
Width B (mm)	43
Inner-ring OD d1 (mm)	124.5
Inner-ring shoulder dia. D1 (mm)	157.1

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	59574
Basic static load rating Cor (lbs)	64071
Basic dynamic load rating Cr (N)	265000
Basic static load rating C0r (N)	285000
Fatigue limit load Cur (N)	12900
Limiting speed nG (rpm)	6,300
Reference speed nB (rpm)	3,350
Effective load centre a (mm)	98

Weight

Weight (kg)	6.31

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	3
Shaft shoulder da (mm)	104
Housing shoulder Da (mm)	176
Housing fillet ra max (mm)	2.5

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,100 rpm
4	66,250	64	508
6	44,167	216	1,714
8	33,125	512	4,063
10	26,500	1,000	7,937
15	17,667	3,375	26,786

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 265,000 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	FAG
Source catalogue	FAG / Schaeffler Rolling Bearings HR 1
Catalogue page	p.364 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

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
BL318	NSK	Ball	90	190	43	42,000 lbs	5.371
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
HR30318J	NSK	Tapered Roller	90	190	43	77,600 lbs	5.915

Same dimensions, same brand

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
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

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1218-K-TVH-C3	FAG	Ball	90	160	30	57 kN	2.48
1218-TVH	FAG	Ball	90	160	30	57 kN	2.52
1318-K-M-C3	FAG	Ball	90	190	43	109 kN	6.27
1318-M	FAG	Ball	90	190	43	109 kN	6.35
16018	FAG	Ball	90	140	16	44 kN	0.866
2218-K-TVH-C3	FAG	Ball	90	160	40	71 kN	3.18
2218-TVH	FAG	Ball	90	160	40	71 kN	3.18
2318-K-M-C3	FAG	Ball	90	190	64	156 kN	8.6

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