6321FAGBall

Name: FAG 6321 Ball Bearing
Brand: FAG
SKU: 6321

6321 is a FAG ball bearing, bore 105 mm, O.D. 225 mm, width 49 mm, dynamic rating 188 kN. Dimensions, drawing, interchanges and price.

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Bore d105mm

Outside dia. D225mm

Width B49mm

Dynamic Cr188kN

Static C0r150kN

Limiting speed4,050rpm

Weight8.7kg

Cr / C0r1.25

Mean dia. dm165mm

Original catalogue drawing - FAG Schaeffler HR 1, page 268

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	105	4.1339
D	Outside diameter	225	8.8583
B	Inner-ring / bearing width	49	1.9291
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)	105
Outside dia. D (mm)	225
Width B (mm)	49
Inner-ring OD d1 (mm)	144.3
Inner-ring shoulder dia. D1 (mm)	187.9

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	42264
Basic static load rating Cor (lbs)	33721
Basic dynamic load rating Cr (N)	188000
Basic static load rating C0r (N)	150000
Fatigue limit load Cur (N)	7800
Factor f0	13.7
Limiting speed nG (rpm)	4,050
Reference speed nB (rpm)	4,450

Weight

Weight (kg)	8.7

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	3
Shaft shoulder da (mm)	119
Housing shoulder Da (mm)	211
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 1,300 rpm
4	47,000	64	821
6	31,333	216	2,769
8	23,500	512	6,564
10	18,800	1,000	12,821
15	12,533	3,375	43,269

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 188,000 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.268 (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
1321	NSK	Ball	105	225	49	169 kN	9.58
6321	NSK	Ball	105	225	49	41,300 lbs	8.119
7321B	NSK	Ball	105	225	49	42,800 lbs	9.389
321	NSK	Cylindrical Roller	105	225	49	71,500 lbs	8.618
NU321E	NSK	Cylindrical Roller	105	225	49	525 kN	9.84
HR30321	NSK	Tapered Roller	105	225	49	560 kN	9.52
HR30321J	NSK	Tapered Roller	105	225	49	102,000 lbs	9.525
HR31321J	NSK	Tapered Roller	105	225	49	76,400 lbs	10.043
7321	NSK	Precision / Angular Contact	105	225	49	210 kN	9.43

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1321-M	FAG	Ball	105	225	49	158 kN	10.3
30321-XL	FAG	Tapered Roller	105	225	49	530 kN	10.5
7321-B-MP	FAG	Precision / Angular Contact	105	225	49	209 kN	9
7321-B-XL-MP	FAG	Precision / Angular Contact	105	225	49	225 kN	9.3

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
1221-M	FAG	Ball	105	190	36	75 kN	4.75
1321-M	FAG	Ball	105	225	49	158 kN	10.3
16021	FAG	Ball	105	160	18	57 kN	1.244
6021	FAG	Ball	105	160	26	75 kN	1.67
6021-2RSR	FAG	Ball	105	160	26	75 kN	1.6
6021-2Z	FAG	Ball	105	160	26	75 kN	1.7
61821-2RSR-Y	FAG	Ball	105	130	13	22.1 kN	0.33
61821-2RZ-Y	FAG	Ball	105	130	13	22.1 kN	0.35

Request a quotation for 6321

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