Airtac PTB Single Acting Pen-Type Cylinder PTB12X40SCB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X40SCB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 40mm 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
- Stroke40 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 PTB12X40SCB
The AirTAC PTB12X40SCB is a JIS pen-size single-acting pull cylinder. Air entering the single M5x0.8 port retracts the rod, while an internal spring pushes it back out upon exhaust release. This fail-safe extended state is ideal for holding parts when air pressure drops. Built with a SUS304 stainless barrel and a slim body, it provides 33.1 N of net pull at 0.5 MPa.
Because the powered stroke acts on the smaller rod-side annular area, this pull force is lower than a matching push cylinder. The integrated piston magnet allows position sensing with reed or electronic switches. A fixed TPU bumper cushions the end of stroke, but with heavy tooling mass at mid-to-high speeds, adding an external shock absorber is advised.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X40SCB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X40SCB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 40 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 PTB12X40SCB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×40 | 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 PTB12X40SCB Is Used
Hold-Down Clamp
Spring pressure keeps the rod extended safely against a part. Applying air pulls the clamp back to release the workpiece.
Wire Tensioner
Maintains steady tension on a belt or wire strand. The clevis mount pivots naturally as the line tracks.
Return Actuator
Pulls a light gate or diverter out of the way. Loss of supply pressure lets the spring push the gate closed.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X40SCB 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. If your jig needs less force, the Ø10 bore offers 23.5 N at 0.5 MPa; if you need more, the Ø16 bore provides 65.0 N. The internal return spring demands a minimum 0.2 MPa pressure before motion begins. Plan for a safe working load of roughly 20 N, which accounts for seal friction at 60 percent of the rated 0.5 MPa figure.
The CB double clevis back cover suits pivoting loads, and the M10x1.0 rod-end thread handles tooling attachment. The Ø5 mm rod is designed for coaxial thrust; over this 40 mm stroke, add an external linear bearing if the assembly imposes any side load. Confirm the 60 mm single-acting stroke limit and your switch type when 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 PTB12X40SCB FAQ
It provides 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa. The internal spring requires a minimum of 0.2 MPa to overcome spring tension and retract the rod. Without air, the spring holds the rod fail-safe extended.
It includes a fixed TPU bumper that decelerates the last few millimeters of travel. It is not adjustable, so meter-out the exhaust or add an external shock absorber for heavy tooling. The built-in magnet works with AirTAC reed or electronic switches.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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