Airtac PTB Single Acting Pen-Type Cylinder PTB12X5SR
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X5SR is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 5mm 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
- Stroke5 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 PTB12X5SR
The AirTAC PTB12X5SR is a JIS pen-size single-acting pull cylinder where air entering one 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 pushes outward, the rod automatically extends to a safe state if air pressure drops.
This slim 12 mm bore unit features a SUS304 stainless barrel and a Ø5 mm rod with an M10x1.0 end thread. The built-in S magnet enables position sensing with reed or electronic switches. A fixed TPU bumper decelerates the stroke ends, and the short 5 mm travel keeps cycle times fast for light tooling.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X5SR Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X5SR |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 5 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 PTB12X5SR
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×5 | 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 PTB12X5SR Is Used
Hold-Down Clamp
Uses spring pressure to keep a part extended, then retracts the rod to release the clamp when air is applied.
Belt Tensioner
Applies steady outward tension via the spring, pulling back to slacken the belt during maintenance cycles.
Return Actuator
Fails-safe to the extended position on air loss, ensuring lightweight robotic grippers open automatically.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X5SR the Right Cylinder?
This 12 mm bore generates 33.1 N net pull at 0.5 MPa. Stepping down to a 10 mm bore yields 23.5 N, while moving up to a 16 mm bore provides 65.0 N. Plan for a safe working load of about 20 N, which is roughly 60 percent of the 0.5 MPa rating, to account for seal friction. The internal spring requires a minimum 0.2 MPa pressure before retraction begins.
With a 2:1 safety margin, this model can vertically hold or pull about 1.7 kg. The thin Ø5 mm rod handles coaxial thrust well, but avoid side loads. The R axial inlet keeps plumbing in-line, and the S suffix confirms the piston magnet is present for sensing.
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 PTB12X5SR FAQ
It delivers 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa maximum. Because the spring opposes the air stroke, a minimum pressure of 0.2 MPa is required before the rod retracts. The spring extends the rod automatically upon air loss.
Yes, the S suffix indicates a built-in piston magnet compatible with reed or electronic switches. Cushioning relies on a fixed TPU bumper at each end that decelerates the last few millimeters; for higher speeds with real mass, meter-out the exhaust or add an external shock absorber.
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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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Related AirTAC PTB Pen-Size Cylinders
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