Airtac PSB Single Acting Compact Cylinder PSB4X15
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB4X15 is a single acting, push type (spring return) pen-size mini cylinder with a Ø4mm bore and 15mm 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
- Stroke15 mm
- Port sizeM3×0.5 (tube)
- Acting typePush, single acting
- Rod threadM4×0.7
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB4X15
The AirTAC PSB4X15 is a single-acting push pen cylinder that extends its 2 mm rod using air pressure on one port, while an internal spring handles the retraction. It supplies 4.1 N of net push force at 0.5 MPa, making it suitable for very light-duty positioning tasks in tight spaces.
This slim mini body features a bronze barrel and stainless steel rod. Because it requires only one solenoid line, wiring and tubing remain simple. The spring ensures the rod fails safe to the retracted position if air pressure drops suddenly. Note that this 4 mm bore model has no end cushion or bumper.
Airtac PSB Single Acting Compact Cylinder PSB4X15 Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB4X15 |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø4 mm |
| Rod diameter | Ø2 mm |
| Stroke | 15 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 PSB4X15
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 4 | Bore size in mm. |
| ×15 | 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 PSB4X15 Is Used
Micro Part Ejection
Pushes tiny molded components out of a machining fixture using 4.1 N of net force, with the spring ensuring the ejector retracts safely when air is cut.
Lab Sample Sorting
Acts as a diverter arm on an analytical instrument carousel, using its slim 4 mm body to fit between densely packed sample tubes.
Light Gate Mechanism
Extends a lightweight physical stop to route small electronic chips on a test board, relying on fail-safe retraction to clear the path on power loss.
Is the Airtac PSB Single Acting Compact Cylinder PSB4X15 the Right Cylinder?
This 4 mm bore model provides 4.1 N net push at 0.5 MPa. If you need slightly more force, the 6 mm bore variant offers 10.6 N at the same pressure; there is no smaller standard bore in this series. Plan for a safe working load of roughly 2 N, which is about 60 percent of the rated figure, to account for seal friction and smooth travel.
The internal return spring sets a minimum operating pressure of 0.3 MPa before the rod will move, and the maximum is 0.7 MPa. The air port is an M3x0.5 fitting for small tubing, and the rod-end thread is M4x0.7. When ordering, confirm the 15 mm stroke, and note that this specific configuration does not include a sensor magnet.
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 PSB4X15 FAQ
The net usable push force is 4.1 N at 0.5 MPa and 6.6 N at the maximum 0.7 MPa. Because the internal return spring opposes the air stroke, a minimum pressure of 0.3 MPa is required before the rod begins to move.
No. The 4 mm bore has no end cushion or bumper, so external shock absorption is needed for fast cycles. Additionally, the spring only holds the rod fail-safe in the fully retracted position; it cannot hold an external load mid-stroke or act as a brake.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PSB Pen-Size Cylinders
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