Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25R
The AirTAC Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25R 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 PSBR8X25R
The AirTAC PSBR8X25R 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, climbing to 28.7 N at the 0.7 MPa maximum. The return spring ensures the rod fails safe to the home position on air loss.
A direct M4x0.7 front-cover mounting thread allows straight fixture bolting without extra brackets. The SUS316L stainless barrel shrinks the envelope for tight jigs, while a fixed TPU bumper cushions the stroke ends. For real work, plan a safe load around 11 N to account for seal friction.
Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25R Technical Specifications
| Model | Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25R |
|---|---|
| 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 PSBR8X25R
| 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 PSBR8X25R Is Used
Part Ejector
Pushes small machined components out of a fixture using the direct front thread, with the spring safely pulling the 4mm rod back when air cuts off.
Panel Pusher
Extends to nudge lightweight electronic panels into a test cradle, relying on the 18.7 N net thrust and fixed TPU bumper for soft contact.
Clamp Release
Momentarily overcomes a holding mechanism to free a part, then the spring returns the slim pen body to a retracted resting state.
Is the Airtac PSBR Single Acting Square Head Compact Cylinder PSBR8X25R the Right Cylinder?
This 8mm bore provides 18.7 N net push at 0.5 MPa. If your task is lighter, the 6mm bore offers 10.6 N; for heavier thrust, the 10mm bore yields 29.8 N. The spring sets a 0.2 MPa minimum pressure before motion begins.
The rod is only 4mm thick, so use an external guide for off-axis loads over this 25mm stroke. Mount directly via the front M4x0.7 thread and plumb the R axial back inlet. No magnet is fitted on this base model.
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 PSBR8X25R FAQ
It provides 18.7 N net push at 0.5 MPa and 28.7 N at 0.7 MPa maximum. The internal return spring requires a 0.2 MPa minimum air pressure to extend the rod.
The front cover features an M4x0.7 thread for bolting straight to a jig, while the R suffix denotes an axial back inlet for inline plumbing. The SUS316L stainless barrel resists 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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