Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25U
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25U 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 PSBR8X25U
The AirTAC PSBR8X25U is a single-acting push pen cylinder that extends via one M5x0.8 air port and retracts via an internal spring. It delivers 18.7 N of net push at 0.5 MPa, rising to 28.7 N at the 0.7 MPa maximum. The fail-safe spring holds the rod home on air loss.
You bolt this slim SUS316L stainless body straight to a fixture using the direct M4x0.7 front-cover thread. A fixed TPU bumper cushions the stroke ends.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25U Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25U |
|---|---|
| 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 PSBR8X25U
| 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 PSBR8X25U Is Used
Panel Pusher
Uses the 18.7 N push stroke to nudge lightweight electronic panels into a test fixture.
Part Ejector
Spring-return action safely retracts the 4 mm rod on air loss to prevent conveyor jams.
Clamp Release
Direct M4x0.7 front mount bolts straight to a tooling base for compact clamp release.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25U the Right Cylinder?
This 8 mm bore with a 25 mm stroke offers 18.7 N net push at 0.5 MPa. Stepping down to a 6 mm bore yields 10.6 N, while stepping up to a 10 mm bore provides 29.8 N. The internal return spring sets a 0.2 MPa minimum pressure before motion begins.
Confirm your plumbing needs the U 90-degree side inlet. The direct M4x0.7 front-mount thread simplifies jig attachment. The thin 4 mm rod requires an external guide for off-axis loads over long strokes.
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 PSBR8X25U FAQ
The net push force is 18.7 N at 0.5 MPa and 28.7 N at the 0.7 MPa maximum. The internal return spring requires a 0.2 MPa minimum pressure to move the rod.
The SUS316L stainless body bolts directly via an M4x0.7 front-cover thread. The U configuration adds a 90-degree side air inlet for flat plumbing in tight spaces.
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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