Airtac PTB Single Acting Pen-Type Cylinder PTB12X45SCB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X45SCB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 45mm 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
- Stroke45 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 PTB12X45SCB
The AirTAC PTB12X45SCB is a JIS pen-size single-acting pull cylinder where air entering the M5x0.8 port retracts the rod, and an internal spring pushes it back out upon exhaust. This fail-safe extended state is ideal for holding parts when air pressure drops. It yields a 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa, with the return spring force already subtracted.
Because pulling acts on the smaller rod-side annular area, this net output is lower than a matching push cylinder. The SUS304 stainless barrel and Ø5 mm rod keep the envelope slim for light end-of-arm tooling. A built-in magnet enables position sensing, while the CB double clevis allows pivoting mount integration.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X45SCB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X45SCB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 45 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 PTB12X45SCB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 PTB12X45SCB Is Used
Pivoting Hold-Down Clamp
Uses the CB clevis to swing onto a workpiece, applying 33.1 N of pull at 0.5 MPa to secure parts during machining.
Wire Belt Tensioner
Maintains steady tension on packaging lines, with the spring automatically extending the rod to take up slack on air loss.
Retract-to-Open Gate
Pulls a diverter gate out of the product stream; the fail-safe extended position blocks the lane when the air supply stops.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X45SCB the Right Cylinder?
This 12 mm bore generates 33.1 N of usable pull at 0.5 MPa. If you need less force, the Ø10 bore provides 23.5 N; stepping up to the Ø16 yields 65.0 N. Remember the return spring demands a minimum 0.2 MPa before motion begins. Plan for a safe working load of roughly 20 N, which is about 60 percent of the 0.5 MPa rating, to account for seal friction.
The CB double clevis accommodates pivoting loads, and the -S suffix means a piston magnet is installed for reed or electronic switches. The fixed TPU bumper only decelerates the last few millimeters of travel, so meter-out the exhaust if moving real tooling mass at mid speeds.
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 PTB12X45SCB FAQ
The net pull force is 33.1 N at 0.5 MPa and 51.8 N at 0.7 MPa. Because an internal spring extends the rod, a minimum of 0.2 MPa is required to overcome it and retract the piston.
The -S suffix indicates a built-in piston magnet compatible with reed or electronic switches. Cushioning relies on a fixed TPU bumper that absorbs impact only in the final few millimeters, so external shock absorbers may be needed for heavy loads.
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Related AirTAC PTB Pen-Size Cylinders
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