Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50U
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50U 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, 50mm stroke; the return spring resets the rod when air is released.
- BoreØ12 mm
- Stroke50 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 PSBR12X50U
The AirTAC PSBR12X50U is a single-acting push pen cylinder that extends via one M5x0.8 air port and retracts automatically via an internal spring. It provides 42.9 N of net push force at 0.5 MPa and 65.5 N at 0.7 MPa. This fail-safe design ensures the rod pulls back to its home position whenever air pressure drops.
The slim SUS316L stainless body bolts directly to your jig via the front-cover M5x0.8 thread, eliminating separate brackets. A fixed TPU bumper cushions the stroke ends. Plan for a safe working load of roughly 26 N, which accounts for seal friction and smooth travel.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50U Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50U |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 50 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 PSBR12X50U
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 PSBR12X50U Is Used
Part Ejection
Uses the spring-return push to eject machined components from a tight jig, relying on the fail-safe retract to clear the workspace on air loss.
Panel Pusher
Advances a lightweight panel using the 42.9 N net push force, with the direct front-cover thread keeping the overall footprint minimal.
Clamp Release
Overcomes a holding mechanism to release a clamped part, automatically withdrawing the rod when the single solenoid line vents.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50U the Right Cylinder?
This 12mm bore generates 42.9 N net push at 0.5 MPa. Stepping down to a 10mm bore yields 29.8 N, while stepping up to a 16mm bore provides 74.8 N. The internal return spring requires a minimum 0.2 MPa operating pressure before motion begins, and the U variant adds a 90-degree side inlet for flat plumbing.
The direct M5x0.8 front-mount thread integrates the cylinder straight into your fixture. The thin Ø5 mm piston rod handles coaxial thrust well, but over this 50mm stroke you should add an external guide for any off-axis loads. Confirm the 90-degree side inlet orientation when ordering.
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 PSBR12X50U 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 before the rod extends.
It mounts directly via an M5x0.8 thread integrated into the front cover, requiring no separate bracket. The barrel is constructed from SUS316L stainless steel for durability in damp environments.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC PSBR Pen-Size Cylinders
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