Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU 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
About the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU
The AirTAC PSBR8X50SU is a single-acting push, spring-return pen-size mini cylinder. It supplies 18.7 N of net push at 0.5 MPa, with air entering one M5x0.8 port to extend the rod. A return spring brings the rod home safely upon air loss.
This model features a direct M4x0.7 front-cover mounting thread and a U-type 90-degree side inlet for flat plumbing. The SUS316L stainless barrel resists corrosion in damp environments. A built-in piston magnet works with reed or electronic switches, while a fixed TPU bumper absorbs end-of-stroke impacts.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU |
|---|---|
| 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 PSBR8X50SU
| 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 PSBR8X50SU Is Used
Part Ejector
Uses the spring-return push to eject small stamped parts from a die, ensuring the rod retracts safely if air pressure drops.
Panel Pusher
Extends to nudge lightweight electronic panels into a test fixture via the direct front-cover thread for tight clearance jigs.
Clamp Release
Applies 18.7 N of push at 0.5 MPa to momentarily release a delicate product clamp on a packaging line.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50SU the Right Cylinder?
This 8mm bore generates 18.7 N net push at 0.5 MPa and 28.7 N at 0.7 MPa. Stepping down to a 6mm bore yields 10.6 N at 0.5 MPa, while stepping up to a 10mm bore provides 29.8 N. Plan for a safe working load of about 11 N (roughly 60% of the 0.5 MPa rating), which can lift about 1 kg vertically with a 2:1 margin.
The direct front mount bolts straight to your fixture, saving space. The internal spring sets a 0.2 MPa minimum pressure before motion. The 4mm rod is built for coaxial thrust, so over this 50mm stroke add an external guide to prevent side load. Confirm the M4x0.7 front thread and U side inlet for your assembly.
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 PSBR8X50SU FAQ
The net push force is 18.7 N at 0.5 MPa and 28.7 N at 0.7 MPa. Because a return spring is used, a minimum pressure of 0.2 MPa is required before the rod moves, and the cylinder fails safely retracted on air loss.
The S suffix denotes a built-in piston magnet for position sensing with reed or electronic switches. It mounts directly via the front-cover M4x0.7 thread, and the U suffix indicates a 90-degree side air inlet.
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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