Airtac PTB Single Acting Pen-Type Cylinder PTB12X5CB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X5CB 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 PTB12X5CB
The AirTAC PTB12X5CB 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. It provides 33.1 N of net pull at 0.5 MPa and 51.8 N at the 0.7 MPa maximum. Because the return spring constantly opposes the air stroke, the rod stays safely extended if air pressure drops.
This variant features a CB double clevis back cover for pivoting mountings and a fixed TPU bumper to soften end-of-stroke impacts. The slim SUS304 stainless body saves space on tight jigs. Since the powered motion acts on the smaller rod-side area, this pull force is lower than a matching push cylinder, making correct sizing essential.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X5CB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X5CB |
|---|---|
| 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 PTB12X5CB
| 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 PTB12X5CB Is Used
Pivoting Hold-Down Clamp
Uses the CB double clevis to swing into position, pulling the 5 mm stroke to grip parts securely while the spring safely releases on air loss.
Wire Belt Tensioner
Applies steady retraction force on a pivot mount, pulling 33.1 N at 0.5 MPa to maintain tension and automatically slacking if the air supply fails.
Retract-to-Open Gate
Draws a lightweight diverter gate out of the product flow path, relying on the internal spring to push the barrier back out as a default safety state.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X5CB the Right Cylinder?
Sizing this 12 mm bore requires comparing its 33.1 N net pull at 0.5 MPa against adjacent options. Stepping down to a 10 mm bore yields 23.5 N, while moving up to a 16 mm bore provides 65.0 N. For real-world work, plan for a safe working load of about 20 N, which is roughly 60 percent of the rated figure to account for seal friction. In a vertical lift setup with a 2:1 safety margin, expect to hold or pull about 1.7 kg.
The internal spring sets a 0.2 MPa minimum pressure before motion begins and guarantees fail-safe extension. The 5 mm stroke keeps the Ø5 mm rod highly rigid, but always avoid side loads. Confirm the CB double clevis fits your pivot pin and remember this unit lacks a sensor magnet.
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 PTB12X5CB FAQ
The net pull force is 33.1 N at 0.5 MPa and 51.8 N at the 0.7 MPa maximum. Because the internal spring opposes motion, a minimum pressure of 0.2 MPa is required before the rod retracts. Releasing air lets the spring push the rod back out.
It uses a fixed TPU bumper at each end that decelerates the piston over the last few millimeters. The bumper is not adjustable or a locking brake. At higher speeds with heavy tooling mass, meter-out the exhaust or add an external shock absorber.
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Related AirTAC PTB Pen-Size Cylinders
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