QJ238-N2-MPAFAGBall

Name: FAG QJ238-N2-MPA Ball Bearing
Brand: FAG
SKU: QJ238-N2-MPA

QJ238-N2-MPA is a FAG ball bearing, bore 190 mm, O.D. 340 mm, width 55 mm, dynamic rating 455 kN. Dimensions, drawing, interchanges and price.

Brass cage

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Bore d190mm

Outside dia. D340mm

Width B55mm

Dynamic Cr455kN

Static C0r735kN

Limiting speed3,200rpm

Weight23.8kg

Cr / C0r0.62

Mean dia. dm265mm

Original catalogue drawing - FAG Schaeffler HR 1, page 322

QJ238-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	190	7.4803
D	Outside diameter	340	13.3858
B	Inner-ring / bearing width	55	2.1654
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)	190
Outside dia. D (mm)	340
Width B (mm)	55
Inner-ring OD d1 (mm)	245.8
Inner-ring shoulder dia. D1 (mm)	286.3

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	102288
Basic static load rating Cor (lbs)	165235
Basic dynamic load rating Cr (N)	455000
Basic static load rating C0r (N)	735000
Fatigue limit load Cur (N)	24400
Limiting speed nG (rpm)	3,200
Effective load centre a (mm)	186

Weight

Weight (kg)	23.8

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	4
Shaft shoulder da (mm)	207
Housing shoulder Da (mm)	323
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 1,000 rpm
4	113,750	64	1,067
6	75,833	216	3,600
8	56,875	512	8,533
10	45,500	1,000	16,667
15	30,333	3,375	56,250

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 455,000 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
6238	NSK	Ball	190	340	55	57,300 lbs	22.153
7238B	NSK	Ball	190	340	55	63,700 lbs	21.319
238	NSK	Cylindrical Roller	190	340	55	124,000 lbs	22.226
NU238E	NSK	Cylindrical Roller	190	340	55	855 kN	23
30238	NSK	Tapered Roller	190	340	55	130,000 lbs	20.103
HR30238	NSK	Tapered Roller	190	340	55	880 kN	21.4
7238	NSK	Precision / Angular Contact	190	340	55	345 kN	22.4
7238A5	NSK	Precision / Angular Contact	190	340	55	73,900 lbs	22.303
7238C	NSK	Precision / Angular Contact	190	340	55	77,200 lbs	22.104
30238	Timken	Tapered Roller	190	340	55	839 kN	22.49

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6238-M	FAG	Ball	190	340	55	255 kN	22.6
N238-E-M1	FAG	Cylindrical Roller	190	340	55	680 kN	22.8
NJ238-E-M1	FAG	Cylindrical Roller	190	340	55	680 kN	23.2
NU238-E-M1	FAG	Cylindrical Roller	190	340	55	680 kN	22.8
NUP238-E-M1	FAG	Cylindrical Roller	190	340	55	680 kN	23.5
20238-MB	FAG	Spherical Roller	190	340	55	650 kN	22.5
30238	FAG	Tapered Roller	190	340	55	530 kN	20.8
30238-XL	FAG	Tapered Roller	190	340	55	800 kN	21.4

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
16038	FAG	Ball	190	290	31	158 kN	7.04
6038-M	FAG	Ball	190	290	46	216 kN	11.3
61838	FAG	Ball	190	240	24	73 kN	2.24
61938	FAG	Ball	190	260	33	140 kN	4.39
6238-M	FAG	Ball	190	340	55	255 kN	22.6
6338-M	FAG	Ball	190	400	78	375 kN	50.4
QJ1038-N2-MPA	FAG	Ball	190	290	46	345 kN	11.4
QJ338-N2-MPA	FAG	Ball	190	400	78	735 kN	52.1

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