Airtac PTB Single Acting Pen-Type Cylinder PTB12X50SCB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X50SCB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 50mm 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
- Stroke50 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 PTB12X50SCB
The AirTAC PTB12X50SCB is a JIS pen-size single-acting pull cylinder. Air entering the single M5x0.8 port retracts the Ø5 mm rod, while an internal spring pushes it back out upon exhaust release. This provides a fail-safe extended state during air loss, ideal for holding or returning mechanisms to a safe home position. It yields a 33.1 N net pull at 0.5 MPa.
Built with a SUS304 stainless barrel and a slim mini body, it saves space in tight jigs. The CB double clevis back cover accommodates pivoting loads. Because pulling acts on the smaller rod-side annular area, this output is lower than a matching push cylinder. The fixed TPU bumper decelerates the stroke only in the final few millimeters.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X50SCB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X50SCB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 50 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 PTB12X50SCB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 PTB12X50SCB Is Used
Pivoting Hold-Down Clamp
Uses the CB clevis to swing into place. Spring pressure keeps the rod extended securely against a part, while air retracts it to release.
Wire Belt Tensioner
Maintains steady pulling tension on a belt or wire. Loss of air pressure leaves the rod safely extended, preserving baseline tension.
Retract-to-Open Gate
Air pulls the rod back to open a small diverter gate on a line. Exhausting air lets the spring push the gate closed automatically.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X50SCB the Right Cylinder?
This 12 mm bore generates 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa. Sizing both ways: the smaller Ø10 bore offers 23.5 N, while the larger Ø16 provides 65.0 N at 0.5 MPa. For real-world work, plan for a safe load of roughly 20 N (about 60 percent of the 0.5 MPa rating) to account for seal friction. In a vertical lift with a 2:1 margin, it pulls about 1.7 kg.
The internal return spring requires a minimum 0.2 MPa pressure before motion begins. The included -S magnet supports reed or electronic switches for position sensing. With a 50 mm stroke, the slender Ø5 mm rod needs an external guide if subjected to off-axis loads. Confirm your port size (M5x0.8) and rod-end thread (M10x1.0) during ordering.
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 PTB12X50SCB FAQ
The usable net pull is 33.1 N at 0.5 MPa and 51.8 N at the 0.7 MPa maximum. The internal spring dictates a 0.2 MPa minimum pressure before the rod can move. Without air, the spring holds the rod in the extended fail-safe position.
It uses a fixed TPU bumper at each end that decelerates the stroke only in the final few millimeters. For higher speeds with tooling mass, add an external shock absorber. The built-in magnet works with AirTAC reed or electronic switches.
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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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Most inquiries answered within 7-8 hours.
Related AirTAC PTB Pen-Size Cylinders
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