Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50R
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50R 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 PSBR8X50R
The AirTAC PSBR8X50R is a single-acting push pen cylinder that extends via one M5x0.8 air port and relies on an internal spring to retract. It supplies 18.7 N of net push at 0.5 MPa. The direct M4x0.7 front-cover thread bolts straight to your fixture, saving space in tight assemblies.
Built with a SUS316L stainless barrel and a slim Ø4 mm rod, this mini body handles 50 mm strokes efficiently. A fixed TPU bumper cushions the end of travel. Because the return spring sets a minimum pressure of 0.2 MPa, the rod stays safely retracted on air loss.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50R Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50R |
|---|---|
| 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 PSBR8X50R
| 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 PSBR8X50R Is Used
Part Ejector
Pushes small finished components out of a machining fixture using the direct front-mount thread, with the spring ensuring the rod retracts clear on air loss.
Panel Pusher
Indexes lightweight electronic panels along a conveyor using 18.7 N of net push, fitting easily into narrow machinery gaps with its slim pen-size body.
Clamp Release
Momentarily overcomes a light spring clamp to release a workpiece, automatically withdrawing when air pressure drops to keep the clamp engaged by default.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X50R the Right Cylinder?
This 8 mm bore provides 18.7 N net push at 0.5 MPa. If you need less force, the Ø6 bore yields 10.6 N; for more power, the Ø10 bore offers 29.8 N. The direct front-mount thread simplifies installation without extra brackets.
Remember the fail-safe retract mechanism requires only one solenoid line. The thin Ø4 mm rod handles coaxial thrust well, but over this 50 mm stroke you should add an external guide for any off-axis loads. Confirm the R axial inlet and M4x0.7 front thread match your jig before 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 PSBR8X50R FAQ
The net push force is 18.7 N at 0.5 MPa and 28.7 N at the maximum 0.7 MPa. Because it is spring-return, a minimum pressure of 0.2 MPa is required before the rod moves, and the rod fails safe to the retracted position on air loss.
It mounts directly via the M4x0.7 thread on the front cover, eliminating separate brackets. The R back cover provides an axial air inlet, and the SUS316L stainless barrel suits damp or washdown 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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