Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50SR
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50SR 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 PSBR12X50SR
The AirTAC PSBR12X50SR is a JIS pen-size single-acting push cylinder with a 50mm stroke and 12mm 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, requiring only one solenoid line. It provides 42.9N net push at 0.5 MPa and 65.5N at 0.7 MPa.
You mount this cylinder directly via its front-cover M5x0.8 thread, eliminating extra brackets for tight jigs. The SUS316L stainless barrel resists corrosion in damp environments. A fixed TPU bumper cushions the stroke ends. For practical sizing, plan for a safe working load of about 26N (roughly 60% of the 0.5MPa figure) to account for friction, or expect to lift about 2.2kg vertically with a sane 2:1 margin.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50SR Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50SR |
|---|---|
| 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 PSBR12X50SR
| 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 PSBR12X50SR Is Used
Part Ejection
Uses the spring-return push action to eject small machined parts from a fixture, ensuring the arm safely retracts if compressed air drops.
Panel Pusher
Direct front-cover M5x0.8 mounting bolts straight into tight assembly jigs to push lightweight panels into alignment.
Clamp Release
Applies 42.9N of net push at 0.5 MPa to disengage a holding clamp, with the spring automatically pulling back to clear the workspace.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X50SR the Right Cylinder?
This 12mm bore delivers 42.9N net push at 0.5 MPa. Stepping down to a 10mm bore yields 29.8N, while a 16mm bore provides 74.8N. Choose this model when your fixture requires moderate push force within a slim profile. The internal spring sets a 0.2 MPa minimum pressure before motion begins. Remember the thin 5mm rod is built for coaxial thrust; over this 50mm stroke, add an external guide or linear bearing to prevent side-load wear.
Confirm the front-cover M5x0.8 mounting thread matches your bolt engagement, especially on bottom mounting. The R axial back cover allows in-line plumbing. The built-in magnet (-S) supports reed or electronic switches for position sensing.
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 PSBR12X50SR FAQ
It delivers 42.9N net push at 0.5 MPa and 65.5N at 0.7 MPa maximum. Because a return spring is built-in, the cylinder requires a 0.2 MPa minimum pressure to overcome the spring and extend the rod. The spring holds the rod retracted on air loss.
It mounts directly via the front-cover M5x0.8 thread. The R back cover provides an axial air inlet for in-line plumbing. The -S suffix indicates a built-in piston magnet, allowing you to use AirTAC reed or electronic switches for position detection.
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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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