Airtac PTB Single Acting Pen-Type Cylinder PTB16X25CB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB16X25CB 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 PTB16X25CB
The AirTAC PTB16X25CB is a JIS pen-size single-acting pull cylinder with a 16 mm bore and 25 mm stroke. Air entering the single M5x0.8 port retracts the rod, while an internal spring pushes it back out upon exhaust release. This fail-safe extended state is ideal for holding parts when air pressure drops. The CB double clevis back cover accommodates pivoting mountings.
Delivering 65 N of net pull at 0.5 MPa and 101.2 N at the 0.7 MPa maximum, the force acts on the rod-side annular area. The SUS304 stainless build incorporates a fixed TPU bumper at each end to decelerate motion. Plan for a safe working load of about 39 N, which accounts for friction and smooth travel.
Airtac PTB Single Acting Pen-Type Cylinder PTB16X25CB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB16X25CB |
|---|---|
| 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 PTB16X25CB
| 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 PTB16X25CB Is Used
Pivoting Hold-Down Clamp
Uses the CB clevis to swing clear of a workstation. Air pulls the rod to release the part, and the spring failsafe extends it to clamp securely during air loss.
Wire Belt Tensioner
Maintains constant tension on a conveyor belt. The spring keeps the rod extended to take up slack, while air retracts the assembly to relax the belt for maintenance.
Return-to-Home Actuator
Pushes a lightweight slider back to its starting position. The single air line simplifies valving, and the spring guarantees the mechanism returns home if pneumatic power fails.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB16X25CB the Right Cylinder?
This 16 mm bore provides 65 N net pull at 0.5 MPa. If your pivoting application requires less force, the 12 mm bore offers 33.1 N, but stepping up is not an option as 16 mm is the largest available PTB size. The internal return spring demands a minimum 0.2 MPa pressure to overcome its resistance before retraction begins.
The Ø5 mm piston rod is designed strictly for coaxial thrust; over the 25 mm stroke, any off-axis load requires an external guide or linear bearing to prevent binding. Confirm the CB clevis pin size matches your jig, and note this unit lacks a sensor magnet.
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 PTB16X25CB FAQ
The net pull force is 65 N at 0.5 MPa and 101.2 N at the 0.7 MPa maximum. Because an internal spring opposes the air stroke, a minimum pressure of 0.2 MPa is required before the rod begins to move. Without air, the spring holds the rod in the extended position.
It uses a fixed TPU bumper at each end to decelerate the stroke over the last few millimeters. This bumper is not adjustable. At higher speeds with real tooling mass, you should meter-out the exhaust or add an external shock absorber to prevent bottoming out.
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Related AirTAC PTB Pen-Size Cylinders
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