Airtac PTB Single Acting Pen-Type Cylinder PTB16X50CB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X50CB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø16mm 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.
- BoreØ16 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 PTB16X50CB
The AirTAC PTB16X50CB is a JIS pen-size single-acting pull cylinder with a 16 mm bore and 50 mm stroke. Air entering the single M5x0.8 port retracts the rod, while an internal spring pushes it back out upon exhaust release. This spring-extend design ensures the rod fails safe in the extended position if air pressure drops. It yields a usable net pull of 65 N at 0.5 MPa and 101.2 N at the 0.7 MPa maximum, with the return spring force already subtracted.
Built with a SUS304 stainless barrel and a slim mini body, it saves space on tight jigs and light end-of-arm tooling. The CB double clevis back cover accommodates pivoting loads. A fixed TPU bumper at each end cushions the last few millimeters of travel. Because the powered stroke pulls against the rod-side area, this bore generates lower force than a matching push cylinder, making correct sizing essential for your application.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X50CB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X50CB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø16 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 (Ø16mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 65.0 N |
| 0.7 MPa (max) | 101.2 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 PTB16X50CB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 16 | 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 PTB16X50CB Is Used
Pivoting Hold-Down Clamp
Uses the CB double clevis to swing into position, pulling the rod back to clamp parts securely before releasing air to let the spring lift the jaw safely.
Wire Belt Tensioner
Applies steady tension by retracting against the spring, automatically extending to maintain slack removal if air pressure fluctuates or drops.
Retract-To-Open Gate
Powers the rod inward to open a diversion lane on a line, relying on the fail-safe extended position to physically close the passage during shutdown.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X50CB the Right Cylinder?
When sizing this 16 mm bore actuator, note the net pull is 65 N at 0.5 MPa and 101.2 N at 0.7 MPa. Stepping down to a 12 mm bore drops the usable pull to 33.1 N at 0.5 MPa, while a 16 mm is the largest single-acting pen-size option available. Plan for a safe working load of about 39 N, which assumes roughly 60 percent of the 0.5 MPa rating to account for seal friction and smooth travel.
The internal return spring sets a 0.2 MPa minimum pressure before motion begins. Without live air, the spring holds the rod extended rather than acting as a mechanical lock for external loads. Confirm your ordering essentials: this PTB16X50CB configuration includes a CB double clevis, a 50 mm stroke, an M10x1.0 rod-end thread, and no 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 PTB16X50CB FAQ
The net pull force is 65 N at 0.5 MPa and 101.2 N at 0.7 MPa, with the spring force already deducted. Because the internal spring opposes the air stroke, a minimum pressure of 0.2 MPa is required before the rod can move.
It uses a fixed TPU bumper at each end to decelerate the last few millimeters of travel. The bumper is not adjustable, so at higher speeds with real tooling mass you should meter-out the exhaust or add an external shock absorber. The thin Ø5 mm rod is built for coaxial thrust, so add an external guide for off-axis loads over the 50 mm stroke.
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