Airtac PTB Single Acting Pen-Type Cylinder PTB16X20SR
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X20SR is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø16mm bore and 20mm 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
- Stroke20 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 PTB16X20SR
The AirTAC PTB16X20SR is a JIS pen-size single-acting pull cylinder where air entering the single M5x0.8 port retracts the rod, and an internal spring pushes it back out. This fail-safe extended state is ideal for holding or returning parts when air pressure drops. You get 65 N of net pull at 0.5 MPa, with a 20 mm stroke.
It features a built-in piston magnet for position sensing alongside an R axial inlet for in-line plumbing. The SUS304 stainless body and fixed TPU bumper absorb end-of-stroke impacts. Because the return spring opposes motion, a minimum 0.2 MPa is required before the rod retracts.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X20SR Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X20SR |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 20 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 PTB16X20SR
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×20 | 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 PTB16X20SR Is Used
Hold-Down Clamping
Keeps a workpiece secured by pulling a clamp back, with the spring automatically extending the rod to release the part safely upon air loss.
Wire Belt Tensioner
Maintains steady tension on a moving belt or wire by retracting against the line, allowing the spring to compensate for slack automatically.
Retract-To-Open Gate
Pulls a lightweight diverter gate closed during operation while the spring pushes it open to a safe home position when the pneumatic signal stops.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X20SR the Right Cylinder?
This 16 mm bore provides 65 N net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. If your jig needs less force, the 12 mm bore yields 33.1 N at 0.5 MPa. For heavier loads, stepping up is impossible as 16 mm is the largest pen-size option. Plan for a safe working load of about 39 N, which is roughly 60 percent of the 0.5 MPa rating, to account for friction.
The internal spring guarantees the rod stays extended without live air, but it also sets the 0.2 MPa minimum operating threshold. The thin Ø5 mm rod handles coaxial thrust well, yet over long strokes you should add an external guide to prevent side loading. Confirm the M10x1.0 rod-end thread and axial inlet fit your manifold setup before 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 PTB16X20SR 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 holds the rod extended, a minimum pressure of 0.2 MPa is required to overcome the spring and retract the rod.
Yes, the S suffix denotes a built-in piston magnet compatible with AirTAC reed or electronic solid-state switches. The fixed TPU bumper decelerates the rod over the last few millimeters, but at high speeds with heavy tooling you should meter-out the exhaust or add an external shock absorber.
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Covers non-human-caused product damage.
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Related AirTAC PTB Pen-Size Cylinders
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