Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR 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, 25mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke25 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 PSBR8X25SR
The AirTAC PSBR8X25SR is a single-acting push, spring-return pen-size mini cylinder. It provides 18.7 N of net push at 0.5 MPa and 28.7 N at 0.7 MPa. The return spring ensures the rod retracts safely upon air loss, requiring only one solenoid line. A built-in piston magnet enables position sensing with reed or electronic switches.
This model mounts directly via its front-cover M4x0.7 thread, saving space in tight jigs. The M5x0.8 air port handles the inlet, while the SUS316L stainless barrel suits damp environments. A fixed TPU bumper decelerates the stroke at the ends.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR |
|---|---|
| Series | PSBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 25 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 PSBR8X25SR
| PSBR | JIS pen-size front-mount single acting, push type (spring return) series. |
|---|---|
| 8 | Bore size in mm. |
| ×25 | 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 PSBR8X25SR Is Used
Part Ejector
Uses the spring-return push to eject small machined components from a fixture, returning home safely if air pressure drops.
Panel Pusher
Extends to index lightweight panels along a conveyor, relying on the direct front-mount thread for a compact footprint.
Clamp Release
Applies 18.7 N of net push at 0.5 MPa to release a secondary clamp, with the spring ensuring a fail-safe locked state.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR the Right Cylinder?
This 8 mm bore delivers 18.7 N net push at 0.5 MPa. If you need less force, the 6 mm bore offers 10.6 N; for more power, the 10 mm bore provides 29.8 N. The direct M4x0.7 front-mount thread and axial R back inlet simplify plumbing in compact spaces.
Remember the 0.2 MPa minimum pressure required to overcome the spring. The Ø4 mm rod is built for coaxial thrust, so add an external guide for off-axis loads. Confirm the M5x0.8 port and your switch type 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 PSBR8X25SR FAQ
It delivers 18.7 N net push at 0.5 MPa and 28.7 N at 0.7 MPa maximum. Because it is spring-return, a minimum 0.2 MPa is required before the rod moves, and the spring holds it retracted on air loss.
It bolts directly via the front-cover M4x0.7 thread. The included -S magnet works with reed or electronic switches, and the SUS316L barrel resists corrosion in 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
Request a Quote for Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25SR
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.