Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR
The AirTAC Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR is a single acting, pull type (spring extend) pen-size mini cylinder with direct front-cover mounting (M5×0.8 thread). A single air port drives the pull stroke on a Ø12mm bore, 75mm stroke; the return spring resets the rod when air is released.
- BoreØ12 mm
- Stroke75 mm
- Port sizeM5×0.8
- Front-mount threadM5×0.8
- Acting typePull, single acting
- ReturnSpring
About the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR
The AirTAC PTBR12X75SR is a JIS pen-size single-acting pull cylinder featuring a 12mm bore and 75mm stroke. A spring holds the rod extended, while supplying air to the M5x0.8 port retracts it. Releasing air pressure lets the spring push the rod back out, providing a fail-safe extended state on air loss. It yields about 33.1 N of net pull at 0.5 MPa.
This model bolts directly to a fixture via its M5x0.8 front-cover thread, eliminating extra brackets. The SUS316L stainless barrel resists corrosion in tight spaces. A fixed TPU bumper cushions the stroke ends. Because the -S suffix denotes a built-in magnet, you can track rod position using reed or electronic switches.
Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR Technical Specifications
| Model | Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR |
|---|---|
| Series | PTBR JIS pen-size front-mount cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 75 mm |
| Acting type | Single acting, pull type (spring extend) |
| Front-mount thread | M5×0.8 |
| 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 75 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 (M5×0.8); barrel is SUS316L. Forces below are NET spring-deducted values. Confirm against the product label.
Net Pull Force (Ø12mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 33.1 N |
| 0.7 MPa (max) | 51.8 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 PTBR12X75SR
| PTBR | JIS pen-size front-mount single acting, pull type (spring extend) series. |
|---|---|
| 12 | Bore size in mm. |
| ×75 | 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 (M5×0.8). Related PBR-family variants: PBR (double acting), PSBR (single-acting push).
Where the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR Is Used
Fail-Safe Hold-Down Clamp
Secures a workpiece while air pressure pulls the rod back. If air drops, the spring pushes the rod out to maintain a safe, clamped position.
Retract-to-Open Gate
Uses the direct front-cover thread to mount on a conveyor diverter. Air retracts the gate to allow passage, and the spring extends it closed by default.
Tensioning Mechanism
Pulls a belt or cable under precise force. The slim SUS316L body fits into compact jigs where maintaining consistent tension is critical.
Is the Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR the Right Cylinder?
When sizing this 12mm bore, note it provides 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa. Stepping down to a 10mm bore yields 23.5 N at 0.5 MPa, while moving up to a 16mm bore offers 65.0 N. Plan for a safe working load of roughly 20 N, which is about 60 percent of the 0.5 MPa figure, to account for seal friction. For vertical lifts, expect to pull or hold about 1.7 kg with a sane 2:1 margin.
The spring requires a minimum 0.2 MPa to move. The thin Ø5 mm piston rod handles coaxial thrust well, but over this 75mm stroke you should add an external guide for any off-axis loads. Confirm your M5x0.8 front-mount thread engagement and select reed or electronic switches for the magnet.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Bolt directly through the front cover (M5×0.8)
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 75 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 PTBR12X75SR FAQ
It provides 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa. Because it is a single-acting pull cylinder, a minimum of 0.2 MPa is required to overcome the spring and retract the rod. The spring ensures the rod fails safe in the extended position on air loss.
It mounts directly via the M5x0.8 front-cover thread, so no separate bracket is needed. The -S suffix means it has a built-in piston magnet compatible with AirTAC reed or electronic switches. The SUS316L stainless barrel provides excellent durability in tight spaces.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PTBR Pen-Size Cylinders
Request a Quote for Airtac PTBR Single Acting Square Head Compact Cylinder PTBR12X75SR
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.