Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20SR
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20SR 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 PSBR12X20SR
The AirTAC PSBR12X20SR is a single-acting push pen cylinder that extends via air pressure and retracts via an internal spring. It delivers 42.9 N of net push at 0.5 MPa, rising to 65.5 N at the 0.7 MPa maximum. The fail-safe spring ensures the rod pulls home on air loss.
This compact 12 mm bore unit bolts straight to a jig via its direct M5x0.8 front-cover thread. Air enters through a separate M5x0.8 port, while a fixed TPU bumper cushions the end strokes. The built-in -S magnet supports reed or electronic switches.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20SR Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20SR |
|---|---|
| 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 PSBR12X20SR
| 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 PSBR12X20SR Is Used
Part Ejector
Uses the spring return to push finished parts out of a machining fixture safely when air pressure drops.
Panel Pusher
Bolts directly via the front-cover thread to index lightweight panels on a tight assembly line.
Clamp Release
Extends to free a locked component, then relies on the internal spring to retract clear of the workspace.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR12X20SR the Right Cylinder?
At 0.5 MPa this 12 mm bore provides 42.9 N of usable thrust. Stepping down to a 10 mm bore yields 29.8 N, while sizing up to a 16 mm bore offers 74.8 N. Plan for a safe working load of about 26 N, which is roughly 60 percent of the rated 0.5 MPa figure, to account for seal friction.
The direct M5x0.8 front-mount thread saves space, and the spring provides fail-safe retraction. The thin Ø5 mm rod handles coaxial thrust well, but add an external guide for any off-axis loads. Confirm your plumbing fits the R axial inlet and M5x0.8 air port.
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 PSBR12X20SR FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. The internal return spring sets a 0.2 MPa minimum pressure before the rod moves, and the cylinder fails safely retracted on air loss.
The -S suffix denotes a built-in piston magnet compatible with reed or electronic switches. The cylinder mounts directly using the M5x0.8 front-cover thread, while the separate M5x0.8 air port handles the pneumatic supply.
Authorized Export Seller
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.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PSBR Pen-Size Cylinders
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