6228NSKBall

Name: NSK 6228 Ball Bearing
Brand: NSK
SKU: 6228

6228 is a NSK ball bearing, bore 140 mm, O.D. 250 mm, width 42 mm, dynamic rating 37,400 lbs. Dimensions, drawing, interchanges and price.

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Bore d140mm

Outside dia. D250mm

Width B42mm

Dynamic Cr37,400lbs

Static C0r33,700lbs

Limiting speed2,200rpm

Weight8.89kg

Cr / C0r1.11

Mean dia. dm195mm

Original catalogue drawing - NSK catalogue, page 17

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	140	5.5118
D	Outside diameter	250	9.8425
B	Inner-ring / bearing width	42	1.6535
r	Chamfer (min)	2.489	0.098

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)	140
Bore d (in)	5.5118
Outside dia. D (mm)	250
Outside dia. D (in)	9.8425
Width B (mm)	42
Width B (in)	1.6535

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	37400
Basic static load rating Cor (lbs)	33700
Limiting speed - grease (rpm)	2,200
Limiting speed - oil (rpm)	2,800
Factor f0	14.9

Weight

Weight (kg)	8.89

Mounting dimensions (fillets / shoulders)

Chamfer r (in)	0.098
Shaft shoulder da min (in)	6.063
Shaft shoulder da max (in)	6.757
Housing shoulder Da max (in)	9.291

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 700 rpm
4	41,591	64	1,524
6	27,727	216	5,143
8	20,795	512	12,190
10	16,636	1,000	23,810
15	11,091	3,375	80,357

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 166,363 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.19 (dimensions) / p.20 (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
6228	FAG	Ball	140	250	42	188 kN	8.07
QJ228-N2-MPA	FAG	Ball	140	250	42	315 kN	9.69
N228-E-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.3
N228-E-XL-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.3
NJ228-E-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.46
NJ228-E-XL-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.46
NU228-E-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.31
NU228-E-XL-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.31
NUP228-E-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.61
NUP228-E-XL-M1	FAG	Cylindrical Roller	140	250	42	460 kN	9.61

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
7228B	NSK	Ball	140	250	42	44,300 lbs	8.8
228	NSK	Cylindrical Roller	140	250	42	67,100 lbs	8.165
NU228E	NSK	Cylindrical Roller	140	250	42	485 kN	9.38
HR30228	NSK	Tapered Roller	140	250	42	480 kN	8.74
HR30228J	NSK	Tapered Roller	140	250	42	87,700 lbs	8.741
7228	NSK	Precision / Angular Contact	140	250	42	240 kN	8.92
7228A5	NSK	Precision / Angular Contact	140	250	42	50,900 lbs	7.911
7228C	NSK	Precision / Angular Contact	140	250	42	53,600 lbs	7.843

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
6028	NSK	Ball	140	210	33	24,700 lbs	3.91
6328	NSK	Ball	140	300	62	56,800 lbs	21.999
6828	NSK	Ball	140	175	18	8,580 lbs	0.812
6928	NSK	Ball	140	190	24	15,000 lbs	1.637
7228B	NSK	Ball	140	250	42	44,300 lbs	8.8
7328B	NSK	Ball	140	300	62	62,000 lbs	21.273

Request a quotation for 6228

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