Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30SR 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 PTBR8X30SR
The AirTAC PTBR8X30SR is a JIS pen-size single-acting pull cylinder. 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 12.4 N of net pull at 0.5 MPa, with the spring force already deducted. A built-in magnet (-S) enables position sensing.
This model bolts directly to a fixture via its M4x0.7 front-cover thread, saving space in tight jigs. The SUS316L stainless barrel and fixed TPU bumper ensure durability.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30SR |
|---|---|
| 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 PTBR8X30SR
| 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 PTBR8X30SR Is Used
Hold-Down Clamp
Uses spring pressure to keep a workpiece clamped safely. Air retracts the pin to release the part.
Retract-to-Open Gate
Spring force holds a diverter gate closed by default. Applying air pulls the gate open.
Web Tensioner
Maintains steady tension on a lightweight film strip. Loss of air pressure safely extends the rod.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X30SR the Right Cylinder?
For this 8 mm bore, the 30 mm stroke sits well within the 60 mm limit. The net pull is 12.4 N at 0.5 MPa and 19.9 N at 0.7 MPa. If you need less force, the 6 mm bore offers 7.1 N at 0.5 MPa; for more power, the 10 mm bore provides 23.5 N. Remember the spring requires a minimum 0.2 MPa to function.
The direct M4x0.7 front-mount thread simplifies installation, while the R axial back cover keeps plumbing in line. The Ø4 mm rod is designed for coaxial thrust, so add an external guide for off-axis loads.
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 PTBR8X30SR FAQ
It provides a net pull of 12.4 N at 0.5 MPa and 19.9 N at 0.7 MPa. A minimum pressure 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 M4x0.7 thread on the front cover. The included -S magnet works with reed or electronic switches for position detection. The SUS316L stainless barrel resists corrosion in tight jigs.
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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