Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR 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.
- BoreØ16 mm
- Stroke25 mm
- Port sizeM5×0.8
- Front-mount threadM5×0.8
- Acting typePull, single acting
- 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 PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR
The AirTAC PTBR16X25SR is a single-acting pull-type pen cylinder featuring a direct M5x0.8 front-cover mounting thread and a SUS316L stainless barrel. Air entering the M5x0.8 port retracts the rod, while a spring extends it out, ensuring a fail-safe extended state upon air loss. It provides 65 N of net pull at 0.5 MPa and 101.2 N at 0.7 MPa.
Because pulling acts on the smaller rod-side area, this force is lower than a matching push cylinder. The fixed TPU bumper decelerates the stroke ends, and the built-in magnet (-S) supports reed or electronic switches.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR |
|---|---|
| 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.
Net Pull Force (Ø16mm)
| 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.
Model Code: Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR
| 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).
Where the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR Is Used
Hold-Down Clamp
Uses spring pressure to keep a clamp open safely, applying 65 N net pull at 0.5 MPa to retract and release the workpiece when air is applied.
Retract-to-Open Gate
Maintains a gate closed via spring force on a conveyor line, using air to pull the Ø5 mm rod back and allow product passage.
Web Tensioner
Provides fail-safe tension on a web line by holding the rod extended, retracting only when signaled by the M5x0.8 air port.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR the Right Cylinder?
For sizing, the PTBR16X25SR offers 65 N net pull at 0.5 MPa. If you need less force, the PTBR12 variant provides 33.1 N at the same pressure. Since this is the largest bore, moving up requires switching to a double-acting PBR series. The fail-safe spring-extend design keeps the rod out safely during air loss.
It bolts directly via the front-cover M5x0.8 thread, and the R axial inlet handles plumbing. The thin Ø5 mm rod requires an external guide for off-axis loads. Confirm your port size and magnet requirements when ordering.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Bolt directly through the front cover (M5×0.8)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 100 mm (single-acting limit)
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 Match bolt size and engagement to the front thread.
- check Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR FAQ
It delivers 65 N net pull at 0.5 MPa and 101.2 N at 0.7 MPa. A minimum pressure of 0.2 MPa is required before the rod can move against the spring. The spring ensures the rod fails safe extended.
It mounts directly via the front-cover M5x0.8 thread. The -S suffix indicates a built-in magnet compatible with reed or electronic switches. The SUS316L barrel provides corrosion resistance.
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 PTBR Pen-Size Cylinders
Request a Quote for Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X25SR
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.