Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR is a single acting, pull type (spring extend) pen-size mini cylinder with direct front-cover mounting (M5×0.8 thread). A single air port drives the pull stroke on a Ø12mm bore, 25mm stroke; the return spring resets the rod when air is released.
- BoreØ12 mm
- Stroke25 mm
- Port sizeM5×0.8
- Front-mount threadM5×0.8
- Acting typePull, 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 PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR
The AirTAC PTBR12X25SR is a JIS pen-size single-acting pull cylinder with a 12mm bore and 25mm stroke. Air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out, ensuring a fail-safe extended state on air loss. It delivers 33.1N of net pull at 0.5MPa and 51.8N at 0.7MPa, with the spring force already deducted.
This model features a built-in piston magnet for position sensing alongside an R axial-inlet back cover. The SUS316L stainless barrel provides corrosion resistance, and a fixed TPU bumper cushions the stroke ends. You can bolt this slim actuator straight to a jig using the direct M5x0.8 front-cover mounting thread.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type (spring extend) |
| Front-mount thread | M5×0.8 |
| 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 (pull by air) |
| Max standard stroke | Up to 75 mm |
The spring holds the rod extended; applying air retracts it, and removing air lets the spring push the rod back out. Front cover carries the mounting thread (M5×0.8); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Pull Force (Ø12mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 33.1 N |
| 0.7 MPa (max) | 51.8 N |
These are usable pull 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 PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 12 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| R | Back cover: R axial inlet (bore-dependent). |
Mounting: direct front-cover thread (M5×0.8). Related PBR-family variants: PBR (double acting), PSBR (single-acting push).
Where the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR Is Used
Hold-Down Clamp
Pulls a clamp back to secure a workpiece during machining, with the spring automatically extending the rod to release the part safely if compressed air fails.
Retract-to-Open Gate
Uses the direct front M5x0.8 thread to mount on a conveyor diverter, pulling a gate open on signal and springing it closed to block flow by default.
Tensioner Mechanism
Maintains steady belt tension in light automation, applying a net pulling force and safely extending outward to relieve tension when the air supply is removed.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR the Right Cylinder?
This 12mm bore provides 33.1N net pull at 0.5MPa. If you need less force, the 10mm bore yields 23.5N; for heavier pulling, the 16mm bore offers 65.0N. The spring requires a minimum 0.2MPa operating pressure to move the rod, and the fail-safe spring-extend design keeps the rod out safely during pressure drops.
The direct M5x0.8 front-mount thread allows inline fixture mounting. The included -S magnet supports reed or electronic switches.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Bolt directly through the front cover (M5×0.8)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 75 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 PTBR Single Acting Square Head Compact Cylinder PTBR12X25SR FAQ
It provides a net pull of 33.1N at 0.5MPa and 51.8N at 0.7MPa (maximum pressure). Because it is single-acting pull, a minimum of 0.2MPa is required to overcome the spring and retract the rod. The spring automatically extends the rod if air pressure is lost.
It mounts directly via the M5x0.8 thread on the front cover, eliminating the need for separate brackets. The -S suffix denotes a built-in piston magnet compatible with reed or electronic switches, and the barrel is constructed from SUS316L stainless steel.
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 PTBR Pen-Size Cylinders
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