Air Cylinder, Single Acting, Spring Return CJ1 Series
Brand :
SMC
Caution
- See catalog for specification details.
- Product pictures are representations. CAD data is not supported for some model numbers.
Product Description
An air cylinder made by SMC.
[Features]
· A compact series of double acting cylinders
· The piping direction of the fitting on the rod cover side can be moved freely within a range of ±90°.
Model Number Notation
Model Number Notation
Air Cylinder, Single Acting, Spring Return CJ1 Series Specifications
Air Cylinder, Single Acting, Spring Return CJ1 Series external appearance
Single acting / spring return drawing
| Action | Single acting, spring return |
|---|---|
| Fluid | Air |
| Proof Pressure | 1.05 MPa |
| Maximum operating pressure | 0.7 MPa |
| Minimum operating pressure | 0.3 MPa |
| Ambient and Fluid Temperature | -10 to 70°C (no freezing) |
| Piston Speed | 50 to 500 mm/s |
| Cushioning | None |
| Stroke Length Tolerance | +0.5 0 |
| Mount Support Type | Basic type |
| Lubrication | Not required (non-lubricated) |
Model / Cylinder Inner Diameter / Standard Stroke Table
| Model | Tube Inner Diameter (mm) | Standard Stroke (mm) |
|---|---|---|
| CJ1B2 | 2.5 | 5, 10 |
| CJ1B4 | 4 | 5, 10, 15, 20 |
Compatible Tubing
| Tubing Type | Material | Size | Tube No. | |
|---|---|---|---|---|
| Outer Diameter | Inner Diameter | |||
| Metric Size | Polyurethane | 4 mm | 2.5 mm | TU0425 |
| Soft nylon | 4 mm | 2.5 mm | TS0425 | |
Theoretical Output Table
(Unit: N)
| Tube Internal Diameter (mm) | Rod Diameter (mm) | Operating Direction | Piston Area (mm2) | Operating Pressure (MPa) | ||||
|---|---|---|---|---|---|---|---|---|
| 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | ||||
| 2.5 | 1 | OUT | 4.9 | 0.34 | 0.83 | 1.32 | 1.81 | 2.30 |
| IN | - | 0.64 | ||||||
| 4 | 2 | OUT | 12.6 | 0.74 | 2.00 | 3.26 | 4.52 | 5.78 |
| IN | - | 1.47 | ||||||
Spring Return Force
(Unit: N)
| Tube Inner Diameter (mm) | Retracted Side | Extended Side |
|---|---|---|
| 2.5 | 1.13 | 0.64 |
| 4 | 3.04 | 1.47 |
Weight Table
(Unit: g)
| Tube Inner Diameter (mm) | 5 | 10 | 15 | 20 |
|---|---|---|---|---|
| 2.5 | 1.5 | 2 | - | - |
| 4 | 3.7 | 4.6 | 5.6 | 6.5 |
Diagram
CJ1B2-□SU4 diagram
CJ1B4-□SU4 diagram
| Number | Name | Material | Notes |
|---|---|---|---|
| 1 | Rod cover | Brass | Electroless nickel plating |
| 2 | Cylinder Tubing | Brass | Electroless nickel plating |
| 3 | Piston rod | Stainless steel | - |
| 4 | Spring | Stainless steel wire | - |
| 5 | Piston Seal | NBR | - |
| 6 | Mounting Nut | Brass | Black zinc chromate |
| 7 | Rod End Nut | Iron | Zinc chromate |
*Cannot be disassembled.
Dimensions
(Units: mm)
Tube internal diameter 2.5 mm / CJ1B2-□SU4 dimensional drawing
| Tube Inner Diameter (mm) | Symbol | |||
|---|---|---|---|---|
| S | Z | |||
| Stroke | ||||
| 5 | 10 | 5 | 10 | |
| 2.5 | 16.5 | 25.5 | 29 | 38 |
Tube internal diameter 4 mm / CJ1B4-□SU4 dimensional drawing
| Tube Inner Diameter (mm) | Symbol | |||||||
|---|---|---|---|---|---|---|---|---|
| S | Z | |||||||
| Stroke | ||||||||
| 5 | 10 | 15 | 20 | 5 | 10 | 15 | 20 | |
| 4 | 19.5 | 28.5 | 37.5 | 46.5 | 40 | 49 | 58 | 67 |
Precautions
Piping
- 1. Do not force a connection in a way that lateral force is applied to the cylinder tube. This could cause the cylinder tube to become slanted and malfunction.
Mounting
- 1. Do not use in a way that applies a load to the piston rod during retraction. The spring built in to the cylinder only has the force to return the piston rod and so the piston rod will not return as far as the stroke end if a load is applied.
- 2. Do not install by directly grasping the cylinder tube. This could cause the tube to deform and malfunction.
*See the manufacturer's catalog for product information other than that detailed above.