Airtac PTB Single Acting Pen-Type Cylinder PTB16X25SR
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X25SR is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø16mm bore and 25mm 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
- Stroke25 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 PTB16X25SR
The AirTAC PTB16X25SR is a JIS pen-size single-acting pull cylinder where air entering one M5x0.8 port retracts the rod, and 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. Because the return spring constantly resists the air stroke, a minimum 0.2 MPa is required before motion begins.
This fail-safe extended behavior ensures the rod stays out during air loss, making it ideal for holding or tensioning tasks. The SUS304 stainless body includes a built-in magnet for position sensing. Plan for a safe working load of about 39 N (roughly 60 percent of the 0.5 MPa rating) to account for seal friction and smooth travel.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X25SR Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X25SR |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 25 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 PTB16X25SR
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 16 | Bore size in mm. |
| ×25 | 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 PTB16X25SR Is Used
Hold-Down Clamping
Uses the spring-extended position to safely clamp a workpiece by default, retracting only when air is applied to release the part.
Wire Belt Tensioner
Maintains steady pulling tension on a belt or wire during operation, automatically snapping back to the extended tension state if air pressure drops.
Retract-To-Open Gate
Pulls a lightweight diverter or gate out of the product stream on command, allowing the internal spring to close the lane automatically upon exhaust.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X25SR the Right Cylinder?
Selecting this 16 mm bore gives a usable 65 N net pull at 0.5 MPa. If your task needs less force, the 12 mm bore provides 33.1 N at the same pressure; stepping up is not possible as this is the largest PTB option. Remember the spring sets a minimum 0.2 MPa operating pressure before the rod retracts.
This configuration includes the S option for a piston magnet compatible with reed or electronic switches, and the R axial inlet for in-line plumbing. Confirm your tooling keeps side loads off the Ø5 mm rod, and verify the 25 mm stroke meets your retraction distance.
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 PTB16X25SR FAQ
It delivers 65 N of net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. The internal spring requires a minimum of 0.2 MPa before the rod can move. Without air, the spring holds the rod safely extended.
It uses a fixed TPU bumper at each end that decelerates the last few millimeters of travel; for higher speeds with real mass, meter-out the exhaust or add an external shock absorber. The built-in S magnet works with AirTAC reed or electronic switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PTB Pen-Size Cylinders
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