Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20R
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20R 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 PTBR16X20R
The AirTAC PTBR16X20R is a JIS pen-size single-acting pull cylinder with a 16mm bore and 20mm stroke. Air entering the M5x0.8 port retracts the rod, while a spring pushes it back out, ensuring fail-safe extension on air loss. It delivers 65 N net pull at 0.5 MPa and 101.2 N at 0.7 MPa.
This model bolts directly to a fixture via its M5x0.8 front-cover thread, saving space in tight assemblies. The SUS316L stainless barrel provides corrosion resistance, and a fixed TPU bumper cushions the stroke ends. Plan for a safe working load of about 39 N, which is roughly 60 percent of the rated figure, to account for seal friction.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20R Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20R |
|---|---|
| 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 PTBR16X20R
| 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 PTBR16X20R Is Used
Hold-Down Clamping
Pulls a clamp down onto a workpiece with 65 N of force, releasing automatically to a safe extended position if air pressure drops.
Retract-to-Open Gate
Uses the direct M5x0.8 front-mount thread to secure a diverter gate that springs open on air loss to clear the conveyor path.
Wire Tensioner
Maintains steady pulling tension on a filament line, with the SUS316L barrel resisting humidity in the production environment.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X20R the Right Cylinder?
Select this 16mm bore actuator when you need 65 N of net pull at 0.5 MPa. If your task requires less force, stepping down to a 12mm bore yields 33.1 N at 0.5 MPa. For heavier tensioning, this 16mm bore is the largest available in the series, offering 101.2 N at the 0.7 MPa maximum. The spring requires at least 0.2 MPa to move the rod. The thin Ø5 mm piston rod handles coaxial thrust well, but over long strokes or off-axis loads you should add an external guide to prevent side load damage. Confirm the R axial inlet and direct M5x0.8 front-cover thread match your jig.
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 PTBR16X20R FAQ
It provides a net pull of 65 N at 0.5 MPa and 101.2 N at 0.7 MPa. Because it is a single-acting pull cylinder, a minimum of 0.2 MPa is required to overcome the spring and retract the rod. The spring holds the rod extended on air loss.
It mounts directly via an M5x0.8 thread on the front cover, eliminating separate brackets. The barrel is made of SUS316L stainless steel for durability. This specific configuration includes an R axial back cover inlet and does not have a sensor magnet.
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Standard models usually ship in 3-4 days.
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Related AirTAC PTBR Pen-Size Cylinders
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