Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40SR
The AirTAC PSBR Single Acting Square Head Compact Cylinder PSBR8X40SR 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 PSBR8X40SR
The AirTAC PSBR8X40SR is a JIS pen-size single-acting push cylinder with a 40 mm stroke and 8 mm bore. 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. You get 18.7 N of net push at 0.5 MPa and 28.7 N at 0.7 MPa.
It mounts directly via the front-cover M4x0.7 thread, saving space in tight jigs. The SUS316L stainless barrel resists corrosion in damp environments. A fixed TPU bumper cushions the stroke ends. The built-in magnet supports reed or electronic switches.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40SR Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40SR |
|---|---|
| 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 PSBR8X40SR
| 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 PSBR8X40SR Is Used
Panel Pusher
Extends to push a lightweight panel into a fixture. The spring safely retracts the rod when air stops.
Part Ejector
Ejects small parts off a line. The direct front mount saves space and the SUS316L barrel handles damp areas.
Clamp Release
Pushes to release a small clamp. The fail-safe retract ensures the clamp resets if air pressure drops.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X40SR the Right Cylinder?
This 8 mm bore provides 18.7 N net push at 0.5 MPa. If you need less force, the 6 mm bore yields 10.6 N. For heavier tasks, the 10 mm bore offers 29.8 N. The internal spring sets a 0.2 MPa minimum pressure before motion begins. The thin 4 mm rod suits coaxial thrust; over long strokes or off-axis loads, add an external guide to prevent side load damage.
The direct M4x0.7 front-mount thread bolts straight to your fixture. The R axial inlet keeps plumbing in-line. The fixed TPU bumper only decelerates the last few millimeters; at higher speeds with real tooling mass, meter-out the exhaust or add an external shock absorber. Confirm your mounting thread engagement before 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 PSBR8X40SR FAQ
The net push force is 18.7 N at 0.5 MPa and 28.7 N at 0.7 MPa. The internal return spring requires a minimum of 0.2 MPa before the rod moves. The rod fails safe to the retracted position on air loss.
It mounts directly via the front-cover M4x0.7 thread. The built-in magnet works with AirTAC reed or electronic switches. The R axial inlet accepts in-line plumbing.
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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