The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25R is a single acting, pull type (spring extend) pen-size mini cylinder with direct front-cover mounting (M5×0.8 thread). A single air port drives the pull stroke on a Ø16mm bore, 25mm stroke; the return spring resets the rod when air is released.
The AirTAC PTBR16X25R is a JIS pen-size single-acting pull cylinder. Air entering the M5x0.8 port retracts the rod, while a spring pushes it back out. If air pressure drops, the spring fails safe in the extended position. It provides 65 N of net pull at 0.5 MPa and 101.2 N at 0.7 MPa.
You bolt this 16 mm bore actuator straight to a fixture via the direct M5x0.8 front-cover thread. The SUS316L stainless barrel shrinks footprint for tight jigs. A fixed TPU bumper cushions the end strokes. Plan for a safe working load of about 39 N, which is roughly 60 percent of the rated 0.5 MPa force.
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25R |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type (spring extend) |
| Front-mount thread | M5×0.8 |
| Port size | M5×0.8 |
|---|---|
| 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 100 mm |
The spring holds the rod extended; applying air retracts it, and removing air lets the spring push the rod back out. Front cover carries the mounting thread (M5×0.8); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 65.0 N |
| 0.7 MPa (max) | 101.2 N |
These are usable pull forces after the return spring is subtracted, 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.
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) 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: direct front-cover thread (M5×0.8). Related PBR-family variants: PBR (double acting), PSBR (single-acting push).
Spring pressure keeps the clamp extended on a part. Apply air to retract and release the workpiece.
Air retracts the rod to pull a lightweight diverter gate open. Loss of air safely springs the gate shut.
Holds a tensioning roller out against material. Pneumatic pressure pulls the roller back to slacken the line.
This PTBR16X25R offers 65 N net pull at 0.5 MPa. Stepping down to a 12 mm bore drops usable pull to 33.1 N, while this 16 mm unit reaches 101.2 N at the 0.7 MPa maximum. The direct M5x0.8 front mount and R axial inlet streamline plumbing. Confirm your required stroke and the front thread engagement before ordering.
The spring requires 0.2 MPa minimum pressure to move the rod. The thin Ø5 mm piston rod handles coaxial thrust well, but add an external guide for off-axis loads. For vertical lifts, expect to pull about 3.3 kg safely with a 2:1 margin.
Quick checklist
It delivers 65 N net pull at 0.5 MPa and 101.2 N at 0.7 MPa. The internal spring requires a minimum of 0.2 MPa to retract the rod. If air loss occurs, the spring pushes the rod back out to a fail-safe extended state.
It mounts directly via the M5x0.8 thread on the front cover. The R back cover provides an axial M5x0.8 air inlet for in-line plumbing. The SUS316L stainless barrel resists corrosion in tight jigs.
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