Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU 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, 30mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke30 mm
- Port sizeM5×0.8
- Front-mount threadM4×0.7
- Acting typePush, single acting
- ReturnSpring
About the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU
The AirTAC PSBR8X30SU is a JIS pen-size single-acting push cylinder with a 30mm stroke. Air entering the M5x0.8 port extends the Ø4mm rod, while an internal spring ensures fail-safe retraction upon air loss. It supplies 18.7N of net push at 0.5MPa and 28.7N at 0.7MPa. The internal return spring dictates a 0.2MPa minimum operating pressure before motion begins.
This model features a built-in piston magnet for reed or electronic switches, plus a 90-degree side inlet (U) for flat plumbing. The SUS316L stainless barrel resists corrosion in damp environments. A fixed TPU bumper cushions the stroke ends. For reliable operation, plan for a safe working load of about 11N (roughly 60% of the 0.5MPa force), which equates to lifting about 1kg vertically with a 2:1 margin.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 30 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 PSBR8X30SU
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 8 | Bore size in mm. |
| ×30 | 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 PSBR8X30SU Is Used
Part Ejection
Uses the spring-return push to eject small machined components from a fixture, guaranteeing the arm pulls back safely if compressed air drops.
Panel Pusher
Extends to index light panels or cards on a conveyor line, relying on the compact pen-size body and direct front mount to save jig space.
Clamp Release
Applies 18.7N of thrust to momentarily open a packaging clamp, letting the internal spring securely close it during any air loss event.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X30SU the Right Cylinder?
When sizing this single-acting push unit, compare it to adjacent bores: the Ø6 version yields 10.6N at 0.5MPa, while the Ø10 provides 29.8N. The PSBR8X30SU sits comfortably in the middle at 18.7N. The direct M4x0.7 front-cover thread bolts straight to your fixture without a separate bracket. Because the return spring sets a 0.2MPa minimum pressure, ensure your air supply can overcome it. The thin Ø4mm rod is built for coaxial thrust; over this 30mm stroke, add an external guide if the load is off-axis to prevent side loading.
Confirm your ordering essentials: this configuration includes the -S magnet for position sensing and the U-style 90-degree side inlet. The fixed TPU bumper only decelerates the last few millimeters of travel. If you move real tooling mass at higher speeds, meter-out the exhaust or add an external shock absorber to prevent bottoming out.
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 PSBR8X30SU FAQ
The net usable push force is 18.7N at 0.5MPa and 28.7N at 0.7MPa (the maximum operating pressure). Because it is a spring-return cylinder, the spring creates resistance and sets a 0.2MPa minimum pressure required before the rod can extend.
It mounts directly via an M4x0.7 thread on the front cover, eliminating the need for a separate bracket. The -S suffix indicates a built-in piston magnet compatible with reed or electronic switches. The SUS316L stainless barrel provides excellent corrosion resistance for damp environments.
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