Air Cylinder, Short Type, Standard, Double Acting, Single Rod CG3 Series

Brand :

SMC

Caution

■ SMC Product Line
Webpages for products currently without individual pages on this site will be released on an ad-hoc basis.
Refer to the manufacturer's catalog for specification and material details.
Product images may be representative images. Refer to the manufacturer's catalog for shape details.
CAD data is not supported for some model numbers.

Product Description

A standard type short double action, single rod cylinder.
[Features]
· An air cylinder with an overall length reduced by up to 51 mm and weight reduced by up to 24% (compared to CG1).
· Female rod end available as standard.
*See the SMC catalog for specification details.
*Product pictures are representative images. CAD data is not supported for some model numbers.

Air Cylinder, Short Type, Standard, Double Acting, Single Rod CG3 Series Specifications

Air Cylinder, Short Type, Standard, Double Acting, Single Rod CG3 Series external appearance

JIS symbol (rubber bumper)

Specifications

Tube Inner Diameter (mm)		20	25	32	40	50	63	80	100
Action		Double acting, single rod
Lubrication		Not required (non-lubricated)
Fluid		Air
Proof Pressure		1.0 MPa
Maximum operating pressure		0.7 MPa
Minimum operating pressure		0.05 MPa
Ambient and Fluid Temperature		Without auto switch: -10°C to 70°C (No freezing)
Ambient and Fluid Temperature		With auto switch: -10°C to 60°C (No freezing)
Piston Speed		50 to 1,000 mm/s						30 to 700 mm/s
Stroke Length Tolerance		0 to +1.4 mm
Cushioning		Rubber cushion
Mount Support Type		Basic type, foot type, rod-end flange type, head-end flange type, clevis type
Allowable Kinetic Energy	Rod end male thread	0.2 J	0.29 J	0.46 J	0.84 J	1.4 J	2.38 J	4.13 J	6.93 J
Allowable Kinetic Energy	Rod end female thread	0.11 J	0.18 J	0.29 J	0.52 J	0.91 J	1.54 J	2.71 J	4.54 J

*Only use the cylinder within the allowable kinetic energy range. See the SMC catalog for details.

Stroke Table

Tube Inner Diameter (mm)	Standard Stroke (mm)^*
20	25, 50, 75, 100, 125, 150, 200
25	25, 50, 75, 100, 125, 150, 200, 250, 300
32
40
50
63
80
100

*Contact the SMC support center regarding intermediate strokes of 1‑mm increments. (Spacers are not used.)

Theoretical Output Table

(Unit: N)

Tube Internal Diameter D (mm)	Rod Diameter d (mm)	Operating Direction	Piston Area (mm²)	Operating Pressure (MPa)
Tube Internal Diameter D (mm)	Rod Diameter d (mm)	Operating Direction	Piston Area (mm²)	0.2	0.3	0.4	0.5	0.6	0.7
20	8	OUT	314	62.8	94.2	125.6	157	188.4	219.8
20	8	IN	264	52.8	79.2	105.6	132	158.4	184.8
25	10	OUT	491	98.2	147.3	196.4	245.5	294.6	343.7
25	10	IN	412	82.4	123.6	164.8	206	247.2	288.4
32	12	OUT	804	160.8	241.2	321.6	402	482.4	562.8
32	12	IN	691	138.2	207.3	276.4	345.5	414.6	483.7
40	14	OUT	1,257	251.4	377.1	502.8	628.5	754.2	879.9
40	14	IN	1,103	220.6	330.9	441.2	551.5	661.8	772.1
50	18	OUT	1,964	392.8	589.2	785.6	982	1,178.4	1,374.8
50	18	IN	1,709	341.8	512.7	683.6	854.5	1,025.4	1,196.3
63	18	OUT	3,117	623.4	935.1	1,246.8	1,558.5	1,870.2	2,181.9
63	18	IN	2,863	572.6	858.9	1,145.2	1,431.5	1,717.8	2,004.1
80	22	OUT	5,027	1,005.4	1,508.1	2,010.8	2,513.5	3,016.2	3,518.9
80	22	IN	4,646	929.2	1,393.8	1,858.4	2,323	2,787.6	3,252.2
100	26	OUT	7,854	1,570.8	2,356.2	3,141.6	3,927	4,712.4	5,497.8
100	26	IN	7,323	1,464.6	2,196.9	2,929.2	3,661.5	4,393.8	5,126.1

*Theoretical output (N) = Pressure (MPa) × Piston area (mm²).

Weight Table

(Unit: kg)

Tube Inner Diameter (mm)		20	25	32	40	50	63	80	100
Basic weight	Basic type	0.09	0.14	0.20	0.32	0.66	0.92	1.75	2.74
	Rod-End Long Type (G)	0.10	0.15	0.21	0.34	0.70	0.97	1.84	2.85
	Rod End Female Thread Type (F)	0.08	0.12	0.19	0.29	0.60	0.85	1.61	2.53
Additional Bracket Weight	Foot type	0.11	0.13	0.16	0.22	0.48	0.72	0.96	1.75
	Flange type	0.08	0.10	0.14	0.20	0.34	0.50	0.71	1.35
	Clevis Type	0.05	0.08	0.15	0.23	0.40	0.68	0.71	1.28
Pivot bracket		0.08	0.09	0.17	0.25	0.44	0.80	0.98	1.75
Single Knuckle Joint		0.05	0.09	0.09	0.10	0.22	0.22	0.39	0.57
Double knuckle joint (with pin)		0.05	0.09	0.09	0.13	0.26	0.26	0.64	1.31
Additional weight per 50 strokes		0.05	0.07	0.09	0.13	0.19	0.23	0.31	0.43
Additional Switch Magnet Weight		0.01	0.01	0.01	0.01	0.01	0.02	0.02	0.04

Calculation Example) CDG3FN20-100 (built-in magnet, flange type, ø20 mm, 100 stroke)

Basic weight: 0.09 kg (basic type, ø20 mm)
Additional bracket weight: 0.08 kg (flange type)
Additional stroke weight: 0.05 kg / 50 mm
Air cylinder stroke: 100 mm
Additional switch magnet weight: 0.01 kg

0.09 + 0.08 + 0.05 × (100/50) + 0.01 = 0.28 kg

Mounting Procedure

Mounting procedure for clevis: (ø20 to 63 mm)

Mounting procedure for clevis: (ø80 to 100 mm)

Mounting procedure for rod end nut

*1: Tighten the clevis bracket mounting bolts to the proper tightening torques detailed below.
　　ø20 mm: 1.5 N·m, ø25 to 32 mm: 2.9 N·m, ø40 mm: 4.9 N·m
　　ø50 mm: 11.8 N·m, ø63 to 80 mm: 24.5 N·m, ø100 mm: 42.2 N·m
*2: Mount the flange type and foot type so that the distance 't' (clearance) of the rod end nut is at least 1 mm.
*3: The direction of the rod end nut (for male thread) when mounting should be with the hexagonal part at the rod end. Apply the wrench to the hexagonal part.

Diagram

With rubber bumper diagram

Number	Name	Material	Notes
1	Rod cover	Aluminum alloy	Hard anodized aluminum
2	Tube Cover	Aluminum alloy	Hard anodized aluminum
3	Piston	Aluminum alloy	Chromate
4	Piston rod	Carbon steel*	Hard chrome plated*
5	Bushing	Resin/Copper alloy (Multiple layers)	-
6	Bumper A	Resin	-
7	Damper B	Resin	-
8	Wear Ring	Resin	-
9	Rod End Nut	Carbon steel	Nickel plated
10	Rod seal	NBR	-
11	Piston Seal	NBR	-
12	Tube Gasket	NBR	-

*For cylinders with auto switches, a magnet is attached to the piston.
*The material for ø20 mm and ø25 mm cylinders with auto switches is stainless steel.

Dimensions

(Units: mm)

Basic type / CG3BN tube inner diameter, stroke, with rubber bumper dimensional drawing

Rod-end female thread / Long rod-end male thread dimensional drawing

Foot type / CG3LN tube inner diameter, stroke, with rubber bumper dimensional drawing

*See the manufacturer's catalog for dimensional drawings and values other than those provided above.