Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR 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, 20mm stroke; the return spring resets the rod when air is released.
- BoreØ16 mm
- Stroke20 mm
- Port sizeM5×0.8
- Front-mount threadM5×0.8
- Acting typePull, single acting
- ReturnSpring
About the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR
The AirTAC PTBR16X20SR is a JIS pen-size single-acting pull cylinder. Air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out. This provides a fail-safe extended state on air loss, ideal for holding parts in place when pressure drops. It yields about 65 N net pull at 0.5 MPa.
You mount it directly via the front-cover M5x0.8 thread, eliminating extra brackets. The SUS316L stainless barrel resists corrosion, and the -S suffix adds a piston magnet for position sensing. A fixed TPU bumper cushions the stroke ends. Because pull acts on the smaller rod-side area, this output is lower than the matching push-type bore.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 20 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 PTBR16X20SR
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 16 | Bore size in mm. |
| ×20 | 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 PTBR16X20SR Is Used
Fail-Safe Hold-Down Clamp
Keeps a workpiece clamped under tension. The spring holds the rod out during air loss, and the direct front thread mounts flush to the jig.
Retract-to-Open Gate
Pulls a lightweight diverter gate back to allow parts to pass. Releasing air safely springs the gate closed to block the lane.
Web Tensioner
Maintains steady pulling tension on a film or wire strip. The compact SUS316L barrel fits tight spaces, and the magnet confirms rod position.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20SR the Right Cylinder?
This 16 mm bore generates 65 N net pull at 0.5 MPa and 101.2 N at 0.7 MPa. If you need less force, the 12 mm bore offers 33.1 N at 0.5 MPa. For heavier tasks, stepping up is not available as 16 mm is the largest pen-size option. Plan for a safe working load of roughly 39 N (about 60 percent of the 0.5 MPa rating) to account for seal friction.
The fail-safe spring holds the rod extended by default. The direct M5x0.8 front-cover thread bolts straight to your fixture, and the R axial inlet keeps plumbing in line. The built-in magnet works with reed or electronic switches. Confirm your stroke needs, as the thin Ø5 mm rod requires an external guide for off-axis loads.
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 PTBR16X20SR FAQ
It provides 65 N net pull at 0.5 MPa and 101.2 N at 0.7 MPa. Because it is single-acting pull, a minimum pressure of 0.2 MPa is required to overcome the spring and move the rod. If air is lost, the spring pushes the rod out to a fail-safe extended position.
It mounts directly via the front-cover M5x0.8 thread. The R back cover features an axial air inlet for in-line plumbing. The -S suffix indicates a built-in piston magnet, allowing you to attach reed or electronic switches for position detection.
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Standard models usually ship in 3-4 days.
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