Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R is a single acting, pull type (spring extend) pen-size mini cylinder with direct front-cover mounting (M4×0.7 thread). A single air port drives the pull stroke on a Ø8mm bore, 30mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke30 mm
- Port sizeM5×0.8
- Front-mount threadM4×0.7
- 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 PTBR8X30R
The AirTAC PTBR8X30R is a single-acting pull pen-size mini cylinder featuring a direct front-cover M4x0.7 mounting thread. Air entering the M5x0.8 port retracts the 4mm rod, while an internal spring pushes it back out, ensuring fail-safe extension upon air loss. It yields about 12.4 N of net pull at 0.5 MPa.
Built with a SUS316L stainless barrel, this slim body saves space in tight jigs. The fixed TPU bumper decelerates the stroke ends. Because pull acts on the rod-side annular area, this usable force is lower than a matching push cylinder.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 30 mm |
| Acting type | Single acting, pull type (spring extend) |
| Front-mount thread | M4×0.7 |
| 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 60 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 (M4×0.7); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Pull Force (Ø8mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 12.4 N |
| 0.7 MPa (max) | 19.9 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 PTBR8X30R
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 8 | Bore size in mm. |
| ×30 | 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 (M4×0.7). Related PBR-family variants: PBR (double acting), PSBR (single-acting push).
Where the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R Is Used
Hold-Down Clamp
Pulls a small cover down against a fixture. The spring keeps the clamp extended safely open if air pressure drops.
Retract-to-Open Gate
Uses the 12.4 N pull to retract a diverter gate on a conveyor. The direct M4x0.7 mount fits tight side frames.
Light Tensioner
Maintains steady tension on a light wire or tape web.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30R the Right Cylinder?
Select this 8mm bore, 30mm stroke model when you need 12.4 N net pull at 0.5 MPa or 19.9 N at 0.7 MPa. If your task requires less force, the 6mm bore offers 7.1 N at 0.5 MPa; for heavier loads, step up to the 10mm bore providing 23.5 N. A minimum 0.2 MPa pressure is required to overcome the spring before motion begins.
The direct front-cover thread bolts straight to your fixture, eliminating brackets. The R axial inlet keeps plumbing in line. Note the 4mm rod is for coaxial thrust only; over long strokes or off-axis loads, add an external guide to prevent side load damage.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Bolt directly through the front cover (M4×0.7)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 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 PTBR8X30R FAQ
It provides 12.4 N net pull at 0.5 MPa and 19.9 N at 0.7 MPa. A minimum of 0.2 MPa is required to overcome the spring and retract 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 M4x0.7 thread, while air enters through a separate M5x0.8 port on the R axial back cover. The SUS316L stainless barrel provides corrosion resistance in compact spaces.
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
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