Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R 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 Ø10mm bore, 40mm stroke; the return spring resets the rod when air is released.
- BoreØ10 mm
- Stroke40 mm
- Port sizeM5×0.8
- Front-mount threadM4×0.7
- Acting typePull, single acting
- ReturnSpring
About the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R
The AirTAC PTBR10X40R is a JIS pen-size single-acting pull cylinder with a 10mm bore and 40mm stroke. Air entering the M5x0.8 port retracts the rod, while an internal spring pushes it back out. This provides 23.5N of net pull force at 0.5MPa, increasing to 36.7N at the 0.7MPa maximum. Because pull acts on the smaller rod-side area, this force is lower than a matching push-type cylinder.
You bolt this unit straight to a fixture via its direct M4x0.7 front-cover thread, while the R back cover provides an axial inline air inlet. The SUS316L stainless barrel keeps the slim body compact for tight jigs. If air pressure drops, the spring ensures fail-safe extension, pushing the rod out. A fixed TPU bumper cushions the end strokes, and since this unit lacks the S suffix, it does not have a sensor magnet.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø10 mm |
| Rod diameter | Ø4 mm |
| Stroke | 40 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 (Ø10mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 23.5 N |
| 0.7 MPa (max) | 36.7 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 PTBR10X40R
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 10 | 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 (M4×0.7). Related PBR-family variants: PBR (double acting), PSBR (single-acting push).
Where the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R Is Used
Hold-Down Clamp
Uses the fail-safe extended position to hold a workpiece securely, retracting only when air is applied to release the part.
Retract-to-Open Gate
Direct M4x0.7 front-mount thread bolts the slim body straight to a conveyor diverter, pulling the gate open on signal.
Web Tensioner
Maintains steady tension on a filament or tape line, with the spring keeping the rod extended against the material path.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR10X40R the Right Cylinder?
When sizing this 10mm bore, plan for a safe working load of about 14N, which is roughly 60% of the 23.5N net pull at 0.5MPa to account for seal friction. Stepping down to an 8mm bore yields 12.4N, while moving up to a 12mm bore provides 33.1N at the same pressure. This makes the PTBR10X40R a solid middle ground for light tooling.
Remember the spring requires a minimum 0.2MPa to function. The thin 4mm rod handles coaxial thrust well, but over this 40mm stroke or under off-axis loads, you should add an external linear bearing. The fixed TPU bumper only decelerates the last few millimeters, so meter-out the exhaust if moving real mass at higher speeds.
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 PTBR10X40R FAQ
It provides a net pull of 23.5N at 0.5MPa and 36.7N at the 0.7MPa maximum. The internal spring requires at least 0.2MPa to retract the rod, and the cylinder fails safe to the extended position on air loss.
It mounts directly via the M4x0.7 thread on the front cover, eliminating separate brackets. The R back cover features an axial inline air inlet, and the body uses a SUS316L stainless barrel.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC PTBR Pen-Size Cylinders
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