Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU is a single acting, push type (spring return) pen-size mini cylinder with direct front-cover mounting (M4×0.7 thread). A single air port drives the push stroke on a Ø8mm bore, 25mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke25 mm
- Port sizeM5×0.8
- Front-mount threadM4×0.7
- Acting typePush, single acting
- ReturnSpring
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU
The AirTAC PSBR8X25SU is a single-acting push pen cylinder that extends when air enters its M5x0.8 port, relying on an internal spring to retract the rod automatically. It supplies 18.7 N of net push at 0.5 MPa and 28.7 N at 0.7 MPa. The return spring guarantees fail-safe retraction on air loss, keeping tooling safely pulled back.
This compact actuator features a slim SUS316L stainless barrel and mounts directly via its front-cover M4x0.7 thread, eliminating extra brackets. A fixed TPU bumper cushions the stroke ends. The built-in -S magnet supports reed or electronic switches, and the U suffix provides a 90-degree side inlet for flat plumbing.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push type (spring return) |
| Front-mount thread | M4×0.7 |
| Port size | M5×0.8 |
|---|---|
| Operating pressure | 0.2 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 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. Front cover carries the mounting thread (M4×0.7); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Push Force (Ø8mm)
| Pressure | Net push force |
|---|---|
| 0.5 MPa | 18.7 N |
| 0.7 MPa (max) | 28.7 N |
These are usable push forces after the return spring is subtracted, 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 PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 8 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| U / R | Back cover: U 90° side inlet or R axial inlet (bore-dependent). |
Mounting: direct front-cover thread (M4×0.7). Related PBR-family variants: PBR (double acting), PTBR (single-acting pull).
Where the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU Is Used
Part Ejector
Pushes lightweight machined components off a conveyor line with 18.7 N of force, retracting safely when air pressure drops.
Panel Pusher
Extends to index thin electronic panels into a test fixture using the direct front-cover thread for tight spacing.
Clamp Release
Overcomes a holding mechanism to release a clamped part, relying on the spring to withdraw the 4 mm rod on signal loss.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU the Right Cylinder?
This 8 mm bore yields 18.7 N net push at 0.5 MPa. Stepping down to a 6 mm bore drops the output to 10.6 N, while moving up to a 10 mm bore raises it to 29.8 N.
The direct front-cover thread secures the body without extra hardware, and the spring ensures fail-safe retraction. Remember the thin 4 mm rod handles coaxial thrust only; add an external guide for off-axis loads. Confirm the M4x0.7 front-mount thread and the U side-inlet configuration when ordering.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Bolt directly through the front cover (M4×0.7)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe retract on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 mm (single-acting limit)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 0.7 MPa operating pressure.
- check Allow for spring force in the stroke direction.
- check Match bolt size and engagement to the front thread.
- check Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SU FAQ
It delivers 18.7 N of net push at 0.5 MPa and 28.7 N at 0.7 MPa. Because it is single-acting push, the internal return spring sets a 0.2 MPa minimum pressure before the rod moves, and the cylinder fails safely retracted on air loss.
It mounts directly via an M4x0.7 front-cover thread, saving space without extra brackets. The SUS316L stainless barrel resists damp environments, and the built-in magnet works with reed or electronic switches for position detection.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PSBR Pen-Size Cylinders
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