Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U is a single acting, push type (spring return) pen-size mini cylinder with direct front-cover mounting (M5×0.8 thread). A single air port drives the push stroke on a Ø12mm bore, 40mm stroke; the return spring resets the rod when air is released.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Front-mount threadM5×0.8
- Acting typePush, single acting
- ReturnSpring
About the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U
The AirTAC PSBR12X40U is a JIS pen-size single-acting push cylinder with a 12mm bore and 40mm stroke. It delivers 42.9 N of net push at 0.5 MPa, extending when air enters the single M5x0.8 port. An internal return spring brings the rod back, ensuring the unit stays fail-safe retracted if air pressure drops. The U suffix indicates a 90-degree side inlet for flat plumbing.
This model mounts directly via its front-cover M5x0.8 thread, eliminating extra brackets to save jig space. The SUS316L stainless barrel resists corrosion in damp environments. Because the return spring creates resistance, a minimum 0.2 MPa pressure is required before the rod moves. Plan for a safe working load of about 26 N, which is roughly 60 percent of the 0.5 MPa rating, to account for seal friction.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 40 mm |
| Acting type | Single acting, push type (spring return) |
| Front-mount thread | M5×0.8 |
| 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 75 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 (M5×0.8); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Push Force (Ø12mm)
| Pressure | Net push force |
|---|---|
| 0.5 MPa | 42.9 N |
| 0.7 MPa (max) | 65.5 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 PSBR12X40U
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 12 | 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 (M5×0.8). Related PBR-family variants: PBR (double acting), PTBR (single-acting pull).
Where the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U Is Used
Part Ejector
Pushes machined components off a conveyor line with 42.9 N of force, relying on the spring to retract safely when air cuts out.
Panel Pusher
Advances a lightweight electronic panel into a testing jig using the direct front-mount thread to minimize overall footprint.
Clamp Release
Overcomes a mechanical holding force to release a packaged item, utilizing the 90-degree side inlet for tight vertical clearances.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X40U the Right Cylinder?
When sizing this 12mm bore unit, compare it to adjacent options. Stepping down to a 10mm bore yields 29.8 N of net push at 0.5 MPa, while moving up to a 16mm bore provides 74.8 N. This PSBR12X40U sits in the middle with 42.9 N at 0.5 MPa, reaching 65.5 N at the 0.7 MPa maximum. It is ideal for medium-duty ejecting tasks.
The direct front-cover M5x0.8 thread bolts straight to your fixture, and the separate M5x0.8 air port handles incoming pressure. Remember the thin 5mm rod handles coaxial thrust only; add an external guide for off-axis loads over this 40mm stroke. The fixed TPU bumper decelerates the last few millimeters of travel, but meter-out the exhaust if moving heavy tooling at higher speeds.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Bolt directly through the front cover (M5×0.8)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe retract on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 75 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 PSBR12X40U FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. Because the internal return spring creates resistance, a minimum pressure of 0.2 MPa is required to move the rod. The spring ensures fail-safe retraction upon air loss.
It mounts directly via an M5x0.8 thread integrated into the front cover, which bolts straight to your fixture without extra brackets. The barrel is constructed from SUS316L stainless steel for excellent corrosion resistance in damp or washdown environments.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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