Airtac PTB Single Acting Pen-Type Cylinder PTB16X20R
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X20R 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 PTB16X20R
The AirTAC PTB16X20R is a JIS pen-size single-acting pull cylinder where air entering the single M5x0.8 port retracts the rod, while an internal spring pushes it back out. It provides 65 N of net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. The R suffix denotes an axial inline air inlet for streamlined plumbing.
Because the return spring constantly pushes outward, the rod achieves a fail-safe extended state during air loss, making it reliable for hold-down and return-to-home operations. The slim SUS304 stainless body incorporates a fixed TPU bumper to soften end-of-stroke impacts. For practical sizing, plan for a safe working load of roughly 39 N, which accounts for seal friction and smooth travel.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X20R Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X20R |
|---|---|
| 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 PTB16X20R
| 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 PTB16X20R Is Used
Hold-Down Clamping
Keeps a workpiece secured by default, using air to retract the clamp and release the part for transfer.
Wire Belt Tensioner
Maintains steady outward tension on a belt or wire, pulling back only when pneumatic pressure is applied.
Retract-To-Open Gate
Holds a diverting gate closed via spring force, opening the lane momentarily when the rod is pulled inward.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X20R the Right Cylinder?
Selecting this 16 mm bore yields 65 N of usable pull at 0.5 MPa. If your task requires less force, stepping down to the 12 mm bore provides 33.1 N at the same pressure. Since 16 mm is the largest available PTB option, moving beyond 101.2 N at 0.7 MPa requires switching to a double-acting PB series. The internal spring demands a minimum 0.2 MPa operating pressure to overcome initial tension before retraction begins.
Confirm your build needs the axial R inlet configuration and a 20 mm stroke. Without the -S suffix, this unit lacks a sensor magnet. The Ø5 mm rod handles coaxial thrust well, but over its 20 mm stroke you should add an external linear bearing if the application involves any off-axis loads.
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 PTB16X20R FAQ
It delivers 65 N of net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. A minimum of 0.2 MPa is required to overcome the internal spring and initiate the retraction stroke. Upon air loss, the spring forces the rod back to the extended position.
This model uses a fixed TPU bumper at each end to decelerate the last few millimeters of travel; it is not adjustable. At higher speeds with heavy tooling, meter-out the exhaust or add an external shock absorber. This specific unit does not include a sensor magnet.
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Covers non-human-caused product damage.
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Related AirTAC PTB Pen-Size Cylinders
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