Airtac PTB Single Acting Pen-Type Cylinder PTB16X50SR
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X50SR 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 PTB16X50SR
The AirTAC PTB16X50SR is a JIS pen-size single-acting pull cylinder. Air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out upon exhaust release. This provides a fail-safe extended state during air loss, making the unit inherently safe for return-to-home and tensioning tasks. It yields 65 N of net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum.
Built with a SUS304 stainless barrel and a slim mini body, it saves space in tight jigs and light end-of-arm tooling. The integrated piston magnet supports reed or electronic switches for position sensing. Because pulling acts on the smaller rod-side area, this output is lower than a matching push cylinder. A fixed TPU bumper decelerates the stroke endpoints, and the M10x1.0 rod-end thread handles tooling attachment.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X50SR Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X50SR |
|---|---|
| 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 PTB16X50SR
| 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 PTB16X50SR Is Used
Hold-Down Clamping
Uses the spring-extended rod to maintain firm downward pressure on a workpiece, retracting only when air is applied to release the part.
Wire Belt Tensioner
Applies consistent pulling tension on a belt or wire assembly, automatically relaxing the line when the air supply is vented.
Retract-To-Open Gate
Pulls a diverter gate closed to block product flow, relying on the spring to safely push the barrier back open upon air loss.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X50SR the Right Cylinder?
This 16 mm bore generates 65 N net pull at 0.5 MPa. Stepping down, a 12 mm bore yields 33.1 N at the same pressure, which is often too weak for rigid clamping. Stepping up is not possible as 16 mm is the largest pen-size option. Plan for a safe working load of roughly 39 N, which is about 60 percent of the rated figure, to account for seal friction and smooth travel.
The internal return spring sets a minimum 0.2 MPa pressure before motion begins. With a 50 mm stroke, the Ø5 mm rod is slender; add an external guide or linear bearing for off-axis loads to prevent side-load damage. This configuration includes the S magnet and R axial inlet for in-line plumbing.
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 PTB16X50SR FAQ
The net pull force is 65 N at 0.5 MPa and 101.2 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. Upon air loss, the spring pushes the rod to the extended position.
The S suffix indicates a built-in piston magnet for reed or electronic switches. Cushioning relies on a fixed TPU bumper at each end that decelerates the last few millimeters of travel. 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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