61921FAGBall

Name: FAG 61921 Ball Bearing
Brand: FAG
SKU: 61921

61921 is a FAG ball bearing, bore 105 mm, O.D. 145 mm, width 20 mm, dynamic rating 46.5 kN. Dimensions, drawing, interchanges and price.

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Bore d105mm

Outside dia. D145mm

Width B20mm

Dynamic Cr46.5kN

Static C0r44.5kN

Limiting speed6,300rpm

Weight0.87kg

Cr / C0r1.04

Mean dia. dm125mm

Original catalogue drawing - FAG Schaeffler HR 1, page 268

61921 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	105	4.1339
D	Outside diameter	145	5.7087
B	Inner-ring / bearing width	20	0.7874
r	Chamfer (min)	1.1	0.0433

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)	145
Width B (mm)	20
Inner-ring OD d1 (mm)	117.6
Inner-ring shoulder dia. D1 (mm)	132.7

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	10454
Basic static load rating Cor (lbs)	10004
Basic dynamic load rating Cr (N)	46500
Basic static load rating C0r (N)	44500
Fatigue limit load Cur (N)	2140
Factor f0	16.5
Limiting speed nG (rpm)	6,300
Reference speed nB (rpm)	4,600

Weight

Weight (kg)	0.87

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	1.1
Shaft shoulder da (mm)	111
Housing shoulder Da (mm)	139
Housing fillet ra max (mm)	1

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 2,100 rpm
4	11,625	64	508
6	7,750	216	1,714
8	5,812	512	4,063
10	4,650	1,000	7,937
15	3,100	3,375	26,786

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 46,500 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
6921	NSK	Ball	105	145	20	9,460 lbs	0.835
7921A5	NSK	Precision / Angular Contact	105	145	20	10,800 lbs	0.821
7921C	NSK	Precision / Angular Contact	105	145	20	11,500 lbs	0.812

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
B71921-C-T-P4S	FAG	Precision / Angular Contact	105	145	20	58.5 kN	0.814
B71921-E-T-P4S	FAG	Precision / Angular Contact	105	145	20	55 kN	0.813
HCB71921-C-T-P4S	FAG	Precision / Angular Contact	105	145	20	40 kN	0.82
HCB71921-E-T-P4S	FAG	Precision / Angular Contact	105	145	20	38 kN	0.82
HCS71921-C-T-P4S	FAG	Precision / Angular Contact	105	145	20	20.8 kN	0.851
HCS71921-E-T-P4S	FAG	Precision / Angular Contact	105	145	20	19.6 kN	0.85
HSS71921-C-T-P4S	FAG	Precision / Angular Contact	105	145	20	30 kN	0.897
HSS71921-E-T-P4S	FAG	Precision / Angular Contact	105	145	20	28 kN	0.87

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 61921

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