Airtac PTB Single Acting Pen-Type Cylinder PTB16X45R
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X45R is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø16mm bore and 45mm 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
- Stroke45 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 PTB16X45R
The AirTAC PTB16X45R 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. Because the powered stroke pulls against the rod-side area, this 16 mm bore generates 65 N of net pull at 0.5 MPa and 101.2 N at 0.7 MPa. The slim SUS304 stainless body saves space in tight jigs, and the R axial inlet keeps plumbing perfectly in-line.
Without live air the spring holds the rod safely extended, making it ideal for return-to-home or hold-open duties. Plan for a safe working load of about 39 N, which is roughly 60 percent of the 0.5 MPa rating, to account for seal friction. The fixed TPU bumper decelerates the last few millimeters of travel, and the M10x1.0 rod end thread handles standard tooling mounting.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X45R Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X45R |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 45 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 PTB16X45R
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×45 | 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 PTB16X45R Is Used
Hold-Down Clamp
Uses the spring-extended rod to hold a part securely, requiring only a single air pulse to retract and release the workpiece.
Wire Tensioner
Maintains constant pulling tension on a wire or belt during feed operations, automatically returning to the extended position when air exhausts.
Retract-To-Open Gate
Keeps a small access gate closed by default via spring force, pulling it open only when pressurized for safe fail-secure operation.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X45R the Right Cylinder?
Choosing this 45 mm stroke model means sizing the pull force both ways. Dropping to a 12 mm bore lowers the usable pull to 33.1 N at 0.5 MPa, which is often too weak for robust clamping. Stepping up is unnecessary here since 16 mm already provides 65 N at 0.5 MPa, yielding a 2:1 vertical hold margin of about 3.3 kg. A minimum pressure of 0.2 MPa is required before the spring yields and motion begins.
The internal spring guarantees the rod fails safe in the extended position on air loss. Note the thin Ø5 mm rod is built for coaxial thrust, so over this 45 mm stroke you should add an external linear bearing if the application involves any off-axis load. Confirm your valving only requires one solenoid line to drive the retract stroke.
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 PTB16X45R FAQ
This cylinder provides a net pull force of 65 N at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. A minimum pressure of 0.2 MPa is required to overcome the internal spring before the rod retracts. Upon air loss, the spring pushes the rod back to the extended position.
It uses a fixed TPU bumper at each end to decelerate the stroke over the last few millimeters. Because it is not adjustable, running at high speeds with heavy tooling mass can bottom out the bumper. In those cases you should meter-out the exhaust or add an external shock absorber.
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Related AirTAC PTB Pen-Size Cylinders
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