Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40R
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40R 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, 40mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke40 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 PSBR8X40R
The AirTAC PSBR8X40R is a single-acting push pen cylinder with a 40mm stroke. Air entering the M5x0.8 port extends the rod, while an internal spring retracts it. This fail-safe design ensures the rod returns home on air loss, requiring only one solenoid line. It delivers 18.7 N of net push at 0.5 MPa.
The slim SUS316L stainless body bolts directly to your fixture via the front-cover M4x0.7 thread, saving space. A fixed TPU bumper decelerates the rod at stroke ends.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40R Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40R |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 40 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 PSBR8X40R
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 8 | Bore size in mm. |
| ×40 | 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 PSBR8X40R Is Used
Part Ejection
Uses the spring-return push to eject small stamped parts from a die. The fail-safe retract guarantees the ejector clears the mold if air pressure drops.
Panel Pusher
Extends to push lightweight electronic panels into a test socket. The direct front-mount thread secures the cylinder flush inside a dense test fixture.
Clamp Release
Pushes a lever to release a holding clamp. The single solenoid line simplifies wiring, and the SUS316L barrel resists moisture in washdown areas.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40R the Right Cylinder?
This 8mm bore provides 18.7 N net push at 0.5 MPa and 28.7 N at 0.7 MPa. Stepping down to a 6mm bore yields 10.6 N, while a 10mm bore offers 29.8 N. The internal return spring sets a 0.2 MPa minimum pressure before motion begins. The R axial inlet keeps plumbing in-line for tight assemblies.
The direct M4x0.7 front-mount thread eliminates separate brackets. Ensure proper thread engagement when mounting. The 4mm rod is built for coaxial thrust, so add an external guide for any off-axis loads over this 40mm stroke.
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 PSBR8X40R FAQ
The net push force is 18.7 N at 0.5 MPa and 28.7 N at 0.7 MPa. Because it is single-acting push with a return spring, it requires a minimum pressure of 0.2 MPa to overcome the spring and extend the rod.
It mounts directly via the front-cover M4x0.7 thread. The air inlet is an M5x0.8 port with an R axial back cover for in-line plumbing. The SUS316L stainless barrel provides corrosion resistance.
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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