634-2ZFAGBall

Name: FAG 634-2Z Ball Bearing
Brand: FAG
SKU: 634-2Z

634-2Z is a FAG ball bearing, bore 4 mm, O.D. 16 mm, width 5 mm, dynamic rating 1.7 kN. Dimensions, drawing, interchanges and price.

Shielded both sides

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Bore d4mm

Outside dia. D16mm

Width B5mm

Dynamic Cr1.73kN

Static C0r0.67kN

Limiting speed36,000rpm

Weight0.006kg

Cr / C0r2.58

Mean dia. dm10mm

Original catalogue drawing - FAG Schaeffler HR 1, page 196

634-2Z 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	4	0.1575
D	Outside diameter	16	0.6299
B	Inner-ring / bearing width	5	0.1969
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)	4
Outside dia. D (mm)	16
Width B (mm)	5
Inner-ring OD d1 (mm)	8.5
Seal outside dia. D2 (mm)	13.2

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	389
Basic static load rating Cor (lbs)	151
Basic dynamic load rating Cr (N)	1730
Basic static load rating C0r (N)	670
Fatigue limit load Cur (N)	35.5
Limiting speed nG (rpm)	36,000
Reference speed nB (rpm)	35,000

Weight

Weight (kg)	0.006

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)	0.3
Shaft shoulder da (mm)	6.4
Housing shoulder Da (mm)	13.6
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	432	64	356
6	288	216	1,200
8	216	512	2,844
10	173	1,000	5,556
15	115	3,375	18,750

Basic rating life per ISO 281: L₁₀ = (C/P)³ with C = 1,730 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.196 (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
634	NSK	Ball	4	16	5	390 lbs	0.007

Same dimensions, same brand

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
634	FAG	Ball	4	16	5	1.7 kN	0.006
634-2RSR	FAG	Ball	4	16	5	1.7 kN	0.006

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
634	FAG	Ball	4	16	5	1.7 kN	0.006
634-2RSR	FAG	Ball	4	16	5	1.7 kN	0.006

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
604-2Z	FAG	Ball	4	12	4	1 kN	0.002
624	FAG	Ball	4	13	5	1.3 kN	0.003
624-2RSR	FAG	Ball	4	13	5	1.3 kN	0.003
624-2Z	FAG	Ball	4	13	5	1.3 kN	0.004
684-2Z	FAG	Ball	4	9	4	0.7 kN	0.002
623	FAG	Ball	3	10	4	0.6 kN	0.001
623-2RSR	FAG	Ball	3	10	4	0.6 kN	0.001
623-2Z	FAG	Ball	3	10	4	0.6 kN	0.001

Request a quotation for 634-2Z

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