Airtac PTB Single Acting Pen-Type Cylinder PTB12X5R
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X5R 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 PTB12X5R
The AirTAC PTB12X5R 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 delivers 33.1 N of net pull at 0.5 MPa, acting on the smaller rod-side area. The SUS304 stainless barrel and slim body save space in tight jigs.
Because the return spring constantly holds the rod extended, losing air pressure forces the tool into a safe, extended state. The fixed TPU bumper decelerates motion at the end of the short 5 mm stroke. 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 PTB12X5R Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X5R |
|---|---|
| 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 PTB12X5R
| 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 PTB12X5R Is Used
Hold-Down Clamp
Uses spring pressure to keep a workpiece extended, then retracts to release the part for machining operations.
Wire Tensioner
Maintains constant outward tension on a wire or belt, pulling back only when actuated to relieve slack.
Retract-to-Open Gate
Holds a routing gate closed by default and pulls it open upon air signal, ensuring a blocked path during air loss.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X5R the Right Cylinder?
This 12 mm bore provides 33.1 N net pull at 0.5 MPa, sitting between the 10 mm bore (23.5 N) and the 16 mm bore (65.0 N). If your task requires less holding force, step down to the 10 mm; if pulling heavier mechanisms, step up to the 16 mm. A minimum pressure of 0.2 MPa is required before the rod can overcome the spring and move.
The R axial inlet allows inline plumbing, and the M10x1.0 rod-end thread handles tooling mounting. Keep in mind the thin Ø5 mm rod is built for coaxial thrust; if your application involves off-axis loads, add an external guide or linear bearing to prevent side-load damage.
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 PTB12X5R 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 holds the rod extended, a minimum pressure of 0.2 MPa is required to retract it.
A fixed TPU bumper at each end decelerates the piston over the last few millimeters. Since it is not adjustable, running at higher speeds with real tooling mass requires metering out the exhaust or adding an external shock absorber.
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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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