Airtac PSB Single Acting Compact Cylinder PSB4X5
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB4X5 is a single acting, push type (spring return) pen-size mini cylinder with a Ø4mm bore and 5mm stroke. A single air port drives the push stroke; the built-in return spring resets the rod when air is released, so only one solenoid line is needed.
- BoreØ4 mm
- Stroke5 mm
- Port sizeM3×0.5 (tube)
- Acting typePush, single acting
- Rod threadM4×0.7
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB4X5
The AirTAC PSB4X5 is a single-acting push cylinder that extends its 2 mm rod using one air line, while a built-in spring retracts it on exhaust. This fail-safe behavior keeps the rod home during air loss, making it ideal for light ejection and clamping tasks. It provides 4.1 N of net push at 0.5 MPa and 6.6 N at 0.7 MPa.
Built with a bronze barrel and stainless rod, this slim mini body fits tight spaces. The M3x0.5 port accepts small tube fittings. Because the return spring opposes motion, a minimum pressure of 0.3 MPa is required before the rod moves. Plan for a safe working load of roughly 2 N, which accounts for seal friction and smooth travel.
Airtac PSB Single Acting Compact Cylinder PSB4X5 Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB4X5 |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø4 mm |
| Rod diameter | Ø2 mm |
| Stroke | 5 mm |
| Acting type | Single acting, push type (spring return) |
| Port size | M3×0.5 (tube) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.3 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Return | Return spring (push by air) |
| Max standard stroke | Up to 60 mm |
The spring holds the rod retracted; applying air pushes the rod out, and removing air lets the spring return it. Forces below are the NET spring-deducted values from the AirTAC thrust table. Confirm against the product label before installation.
Net Push Force (Ø4mm)
| Pressure | Net push force |
|---|---|
| 0.5 MPa | 4.1 N |
| 0.7 MPa (max) | 6.6 N |
These are the usable push forces after the return spring is subtracted, taken directly from the AirTAC single-acting thrust table. Minimum operating pressure is set by the spring, so this model needs at least the lower pressure shown to move.
Model Code: Airtac PSB Single Acting Compact Cylinder PSB4X5
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 4 | Bore size in mm. |
| ×5 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| R / U / CB | Back cover: R axial inlet, U 90° side inlet, CB double clevis (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PB (double acting), PTB (single-acting pull), PBD (double rod), PBR (front-mount).
Where the Airtac PSB Single Acting Compact Cylinder PSB4X5 Is Used
Micro Part Ejection
Pushes tiny plastic components out of machining fixtures with a safe working load of roughly 2 N, ensuring parts release without damage.
Lab Sample Sorting
Acts as a diverter gate for small vials on diagnostic equipment, relying on spring retraction to clear the path during air loss.
Light Clamp Release
Secures delicate electronic boards during testing; the single air line simplifies tubing while the spring safely unclamps on exhaust.
Is the Airtac PSB Single Acting Compact Cylinder PSB4X5 the Right Cylinder?
This 4 mm bore model offers 4.1 N net push at 0.5 MPa. If your task needs less force, note that 4 mm is the smallest available size in this series. For greater push force, step up to the 6 mm bore, which provides 10.6 N at 0.5 MPa. The internal spring ensures the rod retracts safely upon air loss, but also sets the 0.3 MPa minimum operating pressure. Confirm your ordering essentials: bore, stroke, and mount. This specific model includes no sensor magnet and no end cushion.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe retract on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 mm (single-acting limit)
- ✓ Keep the load coaxial — avoid side load
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.3 – 0.7 MPa operating pressure.
- check Allow for spring force in the stroke direction.
- check Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
Airtac PSB Single Acting Compact Cylinder PSB4X5 FAQ
The net push force is 4.1 N at 0.5 MPa and 6.6 N at 0.7 MPa. The internal return spring requires a minimum operating pressure of 0.3 MPa to extend the rod, and it automatically retracts the rod if air pressure is lost.
No, the 4 mm bore size features no end cushion or bumper, so impacts at the stroke end are direct. This specific model also lacks a sensor magnet. The thin 2 mm rod is designed for coaxial thrust, so use an external guide if side loads are present.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC PSB Pen-Size Cylinders
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