Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 25mm stroke. A single air port drives the pull stroke; the built-in return spring resets the rod when air is released, so only one solenoid line is needed.
- BoreØ12 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typePull, single acting
- Rod threadM10×1.0
- 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 PTB Single Acting Pen-Type Cylinder PTB12X25SCB
The AirTAC PTB12X25SCB is a JIS pen-size single-acting pull cylinder where air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out. It provides 33.1 N of net pull at 0.5 MPa and 51.8 N at 0.7 MPa. Because the return spring constantly resists the air stroke, these figures already reflect the usable force after spring deduction.
This configuration includes a built-in piston magnet for position sensing and a CB double clevis back cover for pivoting loads. The slim SUS304 stainless body saves space in tight jigs, and a fixed TPU bumper cushions the stroke ends. If air pressure drops, the spring ensures the rod fails safely in the extended position.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type (spring extend) |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| 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 60 mm |
The spring holds the rod extended; applying air retracts it, and removing air lets the spring push the rod back out. Forces below are the NET spring-deducted values from the AirTAC thrust table. Confirm against the product label before installation.
Net Pull Force (Ø12mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 33.1 N |
| 0.7 MPa (max) | 51.8 N |
These are the usable pull forces after the return spring is subtracted, taken directly 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 PTB Single Acting Pen-Type Cylinder PTB12X25SCB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder 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 accessories: LB, FA, CJ. Related PB-family variants: PB (double acting), PSB (single-acting push), PBD (double rod), PBR (front-mount).
Where the Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB Is Used
Pivoting Hold-Down Clamp
Uses the CB clevis to swing into position and pull 33.1 N at 0.5 MPa, holding parts securely during machining.
Wire Belt Tensioner
Maintains steady tension on moving lines, with the spring automatically extending the rod to take up slack on air loss.
Retract-to-Open Gate
Pulls a lightweight diverter gate out of the product path when energized, relying on the spring to safely close it otherwise.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB the Right Cylinder?
This 12 mm bore generates 33.1 N of net pull at 0.5 MPa, sitting between the 10 mm bore (23.5 N) and the 16 mm bore (65.0 N). For smooth operation, plan for a safe working load of about 20 N, which accounts for seal friction at sixty percent of the rated force. The internal spring also demands a minimum 0.2 MPa of air pressure before the rod will move.
The CB double clevis accommodates angular misalignment during retraction. Keep in mind the Ø5 mm rod is designed for coaxial thrust; if your application involves off-axis loads, add an external guide to prevent side loading. Position detection is handled by reed or electronic switches via the integrated magnet.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 mm (single-acting limit)
- ✓ Keep the load coaxial — avoid side load
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 Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X25SCB FAQ
It delivers a net pull of 33.1 N at 0.5 MPa and 51.8 N at 0.7 MPa. Because the internal spring holds the rod extended, a minimum air pressure of 0.2 MPa is required to overcome the spring and retract the rod.
It features a fixed TPU bumper at each end that decelerates the stroke over the last few millimeters. The built-in magnet allows you to mount reed or electronic switches for precise end-of-stroke position detection.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Related AirTAC PTB Pen-Size Cylinders
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