Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X40SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X40SR 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, 40mm stroke; the return spring resets the rod when air is released.
- BoreØ16 mm
- Stroke40 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 PTBR16X40SR
The AirTAC PTBR16X40SR is a JIS pen-size single-acting pull cylinder with a 16 mm bore and 40 mm stroke. Air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out, ensuring fail-safe extension on air loss. It yields 65 N of net pull at 0.5 MPa and 101.2 N at 0.7 MPa.
You bolt this actuator straight to a fixture via the direct M5x0.8 front-cover thread, keeping the assembly short. The SUS316L stainless barrel shrinks envelope size for tight jigs. A fixed TPU bumper cushions the end strokes, and the built-in magnet (-S) tracks position with reed or electronic switches.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X40SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X40SR |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø16 mm |
| Rod diameter | Ø5 mm |
| Stroke | 40 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 PTBR16X40SR
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 16 | Bore size in mm. |
| ×40 | 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 PTBR16X40SR Is Used
Fail-Safe Hold-Down Clamp
Clamps a workpiece by pulling air to retract, with the spring maintaining downward pressure if the air supply drops.
Retract-to-Open Gate
Uses the 65 N net pull to hold a diverter gate shut during transit, springing back to the open position at rest.
Web Tensioner
Maintains steady tension on a filament or web by pulling against the spring force, mounted via the front-cover thread.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR16X40SR the Right Cylinder?
When sizing, plan for a safe working load of about 39 N, which is roughly 60 percent of the 65 N net pull at 0.5 MPa, to account for seal friction. Dropping to a 12 mm bore drops net pull to 33.1 N at 0.5 MPa, while this 16 mm unit provides a stronger return. For vertical lifting, the 65 N pull at 0.5 MPa holds or pulls about 3.3 kg with a 2:1 safety margin.
Because the spring holds the rod extended, this model suits hold-down clamps where air loss keeps the tool safely engaged. The rod is only 5 mm thick, so over the 40 mm stroke or under off-axis loads, add an external linear bearing to prevent side-load damage. Confirm the R axial inlet and front-mount thread match your manifold geometry.
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 PTBR16X40SR FAQ
The net pull force is 65 N 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 retract the rod. The spring automatically extends the rod as a fail-safe on air loss.
It mounts directly via the M5x0.8 front-cover thread, eliminating extra brackets. The -S suffix indicates a built-in piston magnet compatible with AirTAC reed or electronic solid-state switches. The SUS316L stainless barrel provides corrosion resistance for tight jigs.
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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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