Airtac PTB Single Acting Pen-Type Cylinder PTB12X15CB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X15CB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 15mm 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
- Stroke15 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 PTB12X15CB
The AirTAC PTB12X15CB is a JIS pen-size mini cylinder engineered for single-acting pull operation. Air entering the M5x0.8 port retracts the Ø5 mm rod, while an internal spring pushes it back out upon exhaust release. This fail-safe extended state is ideal for holding parts secure during air loss. You get 33.1 N of net pull at 0.5 MPa and 51.8 N at 0.7 MPa, with the return spring force already subtracted.
Built with a SUS304 stainless barrel and slim body, it saves space on tight jigs and light end-of-arm tooling. The CB double clevis back cover accommodates pivoting loads. A fixed TPU bumper decelerates the stroke near the ends. For steady travel, plan for a safe working load of roughly 20 N, which accounts for seal friction at about sixty percent of the rated figure.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X15CB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X15CB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 15 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 PTB12X15CB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×15 | 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 PTB12X15CB Is Used
Pivoting Hold-Down Clamp
Uses the CB clevis to swing into position, applying 33.1 N of pull at 0.5 MPa to secure light panels while the spring fails safe in the extended open position.
Wire Belt Tensioner
Maintains steady tension on packaging lines, retracting slightly when air is applied and letting the spring push out to keep belts taut during operation.
Retract-to-Open Gate
Pulls a lightweight diverter gate closed to sort products, then exhausts air so the internal spring pushes the gate back out to a safe home position.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X15CB the Right Cylinder?
Choosing this 12 mm bore requires sizing both ways. Stepping down to Ø6 yields only 7.1 N of net pull at 0.5 MPa, whereas moving up to Ø16 provides 65.0 N. This model sits comfortably in the middle at 33.1 N. Remember the internal spring sets a minimum 0.2 MPa pressure before motion begins. Without live air, the rod stays extended.
The CB double clevis is perfect for applications needing a pivoting mount. The thin Ø5 mm rod handles coaxial thrust well, but over long strokes or off-axis loads you should add an external guide or linear bearing to prevent side load damage. Confirm your porting matches the M5x0.8 thread and rod-end uses M10x1.0.
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 PTB12X15CB FAQ
The net pull force is 33.1 N at 0.5 MPa and 51.8 N at the 0.7 MPa maximum. Because an internal spring opposes the air stroke, a minimum pressure of 0.2 MPa is required before the rod moves. The spring ensures the rod fails safe in the extended position.
The CB double clevis allows the cylinder to pivot during operation. Cushioning relies on a fixed TPU bumper at each end that decelerates the last few millimeters of travel. Because it is not adjustable, metering out the exhaust or adding an external shock absorber is recommended at higher speeds with real tooling mass.
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Related AirTAC PTB Pen-Size Cylinders
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