Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U is a single acting, push type (spring return) pen-size mini cylinder with direct front-cover mounting (M4×0.7 thread). A single air port drives the push stroke on a Ø8mm bore, 50mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke50 mm
- Port sizeM5×0.8
- Front-mount threadM4×0.7
- Acting typePush, single acting
- ReturnSpring
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U
The AirTAC PSBR8X50U is a single-acting push pen cylinder that extends via one M5x0.8 air port and retracts via an internal spring. It supplies 18.7 N of net push at 0.5 MPa, reaching 28.7 N at the 0.7 MPa maximum. The U suffix indicates a 90-degree side inlet for flat plumbing.
You bolt this directly to a fixture using the M4x0.7 front-cover thread, eliminating extra brackets. The SUS316L stainless barrel shrinks the footprint, while a fixed TPU bumper cushions the stroke ends.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 50 mm |
| Acting type | Single acting, push type (spring return) |
| Front-mount thread | M4×0.7 |
| 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 60 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 (M4×0.7); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Push Force (Ø8mm)
| Pressure | Net push force |
|---|---|
| 0.5 MPa | 18.7 N |
| 0.7 MPa (max) | 28.7 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 PSBR8X50U
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 8 | 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 (M4×0.7). Related PBR-family variants: PBR (double acting), PTBR (single-acting pull).
Where the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U Is Used
Panel Pusher
Uses the 18.7 N push stroke to nudge lightweight electrical panels into a test fixture, retracting safely via spring when air drops.
Part Ejector
Ejects small molded parts off a belt using the direct M4x0.7 front mount, saving space while the U side inlet keeps hoses flat.
Clamp Release
Overcomes a spring clamp to release a workpiece, using the fail-safe retract design to secure the clamp automatically on power loss.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50U the Right Cylinder?
This 8mm bore yields 18.7 N net push at 0.5 MPa. If you need less force, the 6mm bore gives 10.6 N; for more power, the 10mm bore provides 29.8 N. The internal spring ensures fail-safe retraction on air loss, requiring only one solenoid line.
With a 50mm stroke, the slender 4mm rod needs an external guide to prevent side-loading. Confirm the direct M4x0.7 front-mount engagement and the 90-degree side inlet orientation when ordering.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Bolt directly through the front cover (M4×0.7)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe retract on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 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 PSBR8X50U FAQ
It provides 18.7 N of net push at 0.5 MPa and 28.7 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.
It bolts directly to a fixture via the M4x0.7 front-cover thread, while air enters through a separate M5x0.8 port. The U suffix denotes a 90-degree side inlet, and the SUS316L barrel suits damp environments.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PSBR Pen-Size Cylinders
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