QJ248-N2-MPAFAGBall

Name: FAG QJ248-N2-MPA Ball Bearing
Brand: FAG
SKU: QJ248-N2-MPA

QJ248-N2-MPA is a FAG ball bearing, bore 240 mm, O.D. 440 mm, width 72 mm, dynamic rating 680 kN. Dimensions, drawing, interchanges and price.

Brass cage

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Bore d240mm

Outside dia. D440mm

Width B72mm

Dynamic Cr680kN

Static C0r1270kN

Limiting speed2,800rpm

Weight53.1kg

Cr / C0r0.54

Mean dia. dm340mm

Original catalogue drawing - FAG Schaeffler HR 1, page 322

QJ248-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	240	9.4488
D	Outside diameter	440	17.3228
B	Inner-ring / bearing width	72	2.8346
r	Chamfer (min)	4	0.1575

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)	240
Outside dia. D (mm)	440
Width B (mm)	72
Inner-ring OD d1 (mm)	312.5
Inner-ring shoulder dia. D1 (mm)	367

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	152870
Basic static load rating Cor (lbs)	285507
Basic dynamic load rating Cr (N)	680000
Basic static load rating C0r (N)	1.27e+06
Fatigue limit load Cur (N)	30500
Limiting speed nG (rpm)	2,800
Effective load centre a (mm)	238

Weight

Weight (kg)	53.1

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	4
Shaft shoulder da (mm)	257
Housing shoulder Da (mm)	423
Housing fillet ra max (mm)	3

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 900 rpm
4	170,000	64	1,185
6	113,333	216	4,000
8	85,000	512	9,481
10	68,000	1,000	18,519
15	45,333	3,375	62,500

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 680,000 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.322 (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
6248	NSK	Ball	240	440	72	375 kN	50.5
248	NSK	Cylindrical Roller	240	440	72	210,000 lbs	50.349
30248	NSK	Tapered Roller	240	440	72	223,000 lbs	45.21

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6248-M	FAG	Ball	240	440	72	360 kN	51.3
N248-E-M1	FAG	Cylindrical Roller	240	440	72	1140 kN	51.5
N248-E-TB-M1	FAG	Cylindrical Roller	240	440	72	1160 kN	51.5
NJ248-E-M1	FAG	Cylindrical Roller	240	440	72	1140 kN	52.5
NJ248-E-TB-M1	FAG	Cylindrical Roller	240	440	72	1140 kN	52.5
NU248-E-M1	FAG	Cylindrical Roller	240	440	72	1140 kN	51.8
NU248-E-TB-M1	FAG	Cylindrical Roller	240	440	72	1140 kN	51.8
30248-XL	FAG	Tapered Roller	240	440	72	1030 kN	47.5

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16048	FAG	Ball	240	360	37	204 kN	12.7
6048-M	FAG	Ball	240	360	56	255 kN	20.5
61848	FAG	Ball	240	300	28	100 kN	3.769
61948	FAG	Ball	240	320	38	211 kN	6.88
6248-M	FAG	Ball	240	440	72	360 kN	51.3
6348-M	FAG	Ball	240	500	95	465 kN	96.4
QJ348-N2-MPA	FAG	Ball	240	500	95	1020 kN	98.2

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