Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X60SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X60SR 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, 60mm stroke; the return spring resets the rod when air is released.
- BoreØ8 mm
- Stroke60 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 PTBR8X60SR
The AirTAC PTBR8X60SR is a JIS pen-size single-acting pull cylinder with a 60 mm stroke and built-in magnet. 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 12.4 N of net pull at 0.5 MPa and 19.9 N at 0.7 MPa. The SUS316L stainless barrel keeps the slim body corrosion-resistant for tight jigs.
You mount this cylinder directly via its front-cover M4x0.7 thread, eliminating separate brackets. Because the pull acts on the smaller rod-side annular area, this usable force is lower than a matching push-type unit. A fixed TPU bumper cushions the stroke ends, and the piston magnet works with reed or electronic switches for position sensing.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X60SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X60SR |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø8 mm |
| Rod diameter | Ø4 mm |
| Stroke | 60 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 PTBR8X60SR
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 8 | Bore size in mm. |
| ×60 | 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 PTBR8X60SR Is Used
Fail-Safe Hold-Down Clamp
Secures light machined parts under a fixture. The spring keeps the clamp extended safely during air pressure drops, retracting only when air is applied.
Retract-to-Open Gate
Controls a small diverter gate on a compact packaging line. The direct M4x0.7 front mount bolts straight to the frame, saving space and simplifying assembly.
Light Tensioning Arm
Maintains steady tension on a delicate wire or film web. The SUS316L barrel resists moisture, while the single-acting design cuts plumbing to one solenoid.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR8X60SR the Right Cylinder?
At the maximum 60 mm stroke for this bore, the PTBR8X60SR yields 12.4 N net pull at 0.5 MPa. If you need less force, stepping down to a 6 mm bore gives 7.1 N. If your jig requires more power, a 10 mm bore provides 23.5 N.
Remember the spring requires a minimum 0.2 MPa to function. The thin 4 mm rod handles coaxial thrust well, but over this long 60 mm stroke, you should add an external linear bearing to prevent side-loading damage. Confirm you need the R axial inlet and the S magnet option when ordering.
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 PTBR8X60SR FAQ
The net pull force is 12.4 N at 0.5 MPa and 19.9 N at 0.7 MPa. Because it is a single-acting pull cylinder, a minimum operating pressure of 0.2 MPa is required to overcome the internal spring and retract the rod.
It mounts directly via the front-cover M4x0.7 thread. The built-in piston magnet (-S option) supports both reed and electronic switches for position confirmation. Air plumbing connects to the R axial back cover inlet.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC PTBR Pen-Size Cylinders
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