61904-2RSRFAGBall

Name: FAG 61904-2RSR Ball Bearing
Brand: FAG
SKU: 61904-2RSR

61904-2RSR is a FAG ball bearing, bore 20 mm, O.D. 37 mm, width 9 mm, dynamic rating 6.8 kN. Dimensions, drawing, interchanges and price.

Sealed both sides

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Bore d20mm

Outside dia. D37mm

Width B9mm

Dynamic Cr6.8kN

Static C0r3.7kN

Limiting speed10,600rpm

Weight0.037kg

Cr / C0r1.84

Mean dia. dm28.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 242

61904-2RSR 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	20	0.7874
D	Outside diameter	37	1.4567
B	Inner-ring / bearing width	9	0.3543
r	Chamfer (min)	0.3	0.0118

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)	20
Outside dia. D (mm)	37
Width B (mm)	9
Seal outside dia. D2 (mm)	33.5

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	1529
Basic static load rating Cor (lbs)	832
Basic dynamic load rating Cr (N)	6800
Basic static load rating C0r (N)	3700
Fatigue limit load Cur (N)	226
Factor f0	14.8
Limiting speed nG (rpm)	10,600

Weight

Weight (kg)	0.037

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	0.3
Shaft shoulder da (mm)	22
Housing shoulder Da (mm)	35
Housing fillet ra max (mm)	0.3

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 3,000 rpm
4	1,700	64	356
6	1,133	216	1,200
8	850	512	2,844
10	680	1,000	5,556
15	453	3,375	18,750

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 6,800 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.242 (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
6904	NSK	Ball	20	37	9	1,430 lbs	0.036
7904A5	NSK	Precision / Angular Contact	20	37	9	1,490 lbs	0.036
7904C	NSK	Precision / Angular Contact	20	37	9	1,570 lbs	0.036

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
61904	FAG	Ball	20	37	9	6.8 kN	0.04
61904-2Z	FAG	Ball	20	37	9	6.8 kN	0.037
B71904-C-T-P4S	FAG	Precision / Angular Contact	20	37	9	7.3 kN	0.036
B71904-E-T-P4S	FAG	Precision / Angular Contact	20	37	9	7 kN	0.036
HCB71904-C-T-P4S	FAG	Precision / Angular Contact	20	37	9	5 kN	0.03
HCB71904-E-T-P4S	FAG	Precision / Angular Contact	20	37	9	4.8 kN	0.03
HCS71904-C-T-P4S	FAG	Precision / Angular Contact	20	37	9	2.7 kN	0.041
HCS71904-E-T-P4S	FAG	Precision / Angular Contact	20	37	9	2.5 kN	0.041

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
61904	FAG	Ball	20	37	9	6.8 kN	0.04
61904-2Z	FAG	Ball	20	37	9	6.8 kN	0.037

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
11204-TVH	FAG	Ball	20	47	14	10.1 kN	0.085
1204-K-TVH-C3	FAG	Ball	20	47	14	10.1 kN	0.116
1204-TVH	FAG	Ball	20	47	14	10.1 kN	0.118
1304-TVH	FAG	Ball	20	52	15	12.7 kN	0.163
16004	FAG	Ball	20	42	8	7.4 kN	0.048
2204-2RS-TVH	FAG	Ball	20	47	18	10.1 kN	0.151
2204-TVH	FAG	Ball	20	47	18	14.7 kN	0.134
2304-2RS-TVH	FAG	Ball	20	52	21	12.7 kN	0.23

Request a quotation for 61904-2RSR

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