Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20U
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20U 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, 20mm stroke; the return spring resets the rod when air is released.
- BoreØ12 mm
- Stroke20 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 PSBR12X20U
The AirTAC PSBR12X20U is a JIS pen-size single-acting push cylinder that extends via one M5x0.8 air port and retracts via an internal spring. It supplies 42.9 N of net push at 0.5 MPa, climbing to 65.5 N at the 0.7 MPa maximum. The return spring ensures the rod safely pulls back to its home position on air loss.
This compact actuator features a SUS316L stainless barrel and bolts directly to your jig via the front-cover M5x0.8 thread. The U suffix designates a 90-degree side inlet for flat plumbing. A fixed TPU bumper cushions the stroke ends, and no magnetic sensor is included on this variant.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20U Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20U |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 20 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 PSBR12X20U
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 12 | Bore size in mm. |
| ×20 | 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 PSBR12X20U Is Used
Panel Pusher
Uses the direct front mount to push lightweight panels out of a machining cell, relying on the fail-safe retract to clear the workspace if compressed air drops.
Part Ejector
Ejects small machined components off a belt; the 90-degree side inlet keeps the pneumatic plumbing flush against the conveyor frame to save space.
Clamp Release
Overcomes a holding mechanism to release a part, with the internal spring guaranteeing the clamp stays engaged securely during an unexpected air loss.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20U the Right Cylinder?
When sizing this 12 mm bore unit, consider the neighboring bores: the 10 mm yields 29.8 N, while the 16 mm provides 74.8 N of net push at 0.5 MPa. For the PSBR12X20U, plan for a safe working load of about 26 N (roughly 60 percent of the 42.9 N rating) to account for seal friction. This equates to lifting a 2.2 kg part vertically with a sane 2:1 margin.
The direct front-mount thread saves space, but the 5 mm rod is built for coaxial thrust, so add an external guide for any off-axis loads. Confirm your 0.2-0.7 MPa supply meets the minimum pressure required to overcome the spring before motion begins.
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 PSBR12X20U FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. Because it is single-acting push with a return spring, a minimum pressure of 0.2 MPa is required before the rod can move. The spring holds the rod retracted on air loss.
It mounts directly via an M5x0.8 thread on the front cover, eliminating extra brackets. The body uses a SUS316L stainless barrel for durability in tight jigs. This specific model lacks a magnetic sensor and uses a 90-degree side air inlet.
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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.
Related AirTAC PSBR Pen-Size Cylinders
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