Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X15R
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X15R 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, 15mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke15 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 PTBR8X15R
The AirTAC PTBR8X15R 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, ensuring a fail-safe extended state upon air loss. It provides 12.4N of net pull at 0.5 MPa, with the spring force already deducted.
The direct M4x0.7 front-cover thread mounts straight to your fixture, eliminating extra brackets. Built with a SUS316L stainless barrel and a fixed TPU bumper, it handles light tensioning tasks.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X15R Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X15R |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 15 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 PTBR8X15R
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 8 | Bore size in mm. |
| ×15 | 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 PTBR8X15R Is Used
Hold-Down Clamping
Maintains tension on light components during machining. The spring holds the rod safely extended if air pressure drops, preventing part ejection.
Retract-to-Open Gate
Controls small diverter gates on a packaging line. Air pulls the gate closed, and venting allows the spring to snap it back to the open home position.
Light Tensioner
Applies steady pulling force to film or wire in automated assemblies. The compact pen-size body fits easily into tight machinery frames.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X15R the Right Cylinder?
When sizing this bore, the PTBR8X15R yields 12.4N net pull at 0.5 MPa. If your task requires less force, stepping down to the Ø6 bore gives 7.1N. If you need more power, moving up to the Ø10 bore provides 23.5N. This fail-safe extend design is ideal for hold-down clamping where air loss safely releases tension.
The direct front-cover M4x0.7 thread simplifies installation, while the R axial back cover keeps plumbing in line. Confirm your stroke needs and note the thin Ø4mm rod requires an external guide for any 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 PTBR8X15R FAQ
It delivers 12.4N net pull at 0.5 MPa and 19.9N 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 if air is lost.
It mounts directly via the M4x0.7 thread on the front cover, requiring no separate bracket. The barrel is constructed from SUS316L stainless steel for durability, and it uses an R axial air inlet. This specific model does not include a sensor magnet.
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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