Airtac PTB Single Acting Pen-Type Cylinder PTB12X15R
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X15R 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 PTB12X15R
The AirTAC PTB12X15R is a JIS pen-size single-acting pull cylinder where air entering the single M5x0.8 port retracts the rod, and an internal spring pushes it back out. It provides 33.1 N of net pull at 0.5 MPa (51.8 N at 0.7 MPa), with the return spring force already subtracted. The R suffix denotes an axial inline air inlet for straightforward plumbing.
Because the spring holds the rod extended, the cylinder fails safe to the out position if air pressure drops. The slim SUS304 stainless body incorporates a fixed TPU bumper at each end to decelerate motion. For practical sizing, plan for a safe working load of about 20 N, which accounts for seal friction and smooth travel.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X15R Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X15R |
|---|---|
| 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 PTB12X15R
| 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 PTB12X15R Is Used
Hold-Down Clamping
Keeps a workpiece clamped under spring pressure. Air retracts the pin to release the part, ensuring the clamp stays engaged if air fails.
Belt Tensioner
Maintains steady tension on a wire or belt. The spring constantly pulls back, while air retracts the assembly to slacken the line for maintenance.
Retract-to-Open Gate
Acts as a diverter gate that springs closed by default. Applying air pulls the gate open to route products, saving valve complexity.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X15R the Right Cylinder?
This 12 mm bore generates 33.1 N net pull at 0.5 MPa. If your task needs less force, the 10 mm bore offers 23.5 N; stepping up to the 16 mm bore yields 65.0 N. Note that the internal spring requires a minimum 0.2 MPa pressure before retraction motion begins. The Ø5 mm piston rod is designed for coaxial thrust, so if your 15 mm stroke involves off-axis loads, add an external linear bearing to prevent side-load wear.
Confirm the rod-end thread is M10x1.0 for your tooling. The fixed TPU bumper only absorbs impact over the final few millimeters, so at high cycling speeds with heavy tooling mass, meter-out the exhaust or install an external shock absorber. This unit has no sensor 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 PTB12X15R 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 extends the rod, a minimum pressure of 0.2 MPa is required to overcome the spring and retract the rod.
A fixed TPU bumper decelerates the piston at the end of the stroke, but it is not adjustable. For heavy tooling at high speeds, use external shock absorption. This specific model lacks a magnet, so magnetic switches cannot be installed.
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Related AirTAC PTB Pen-Size Cylinders
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