Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 135mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75
The AirTAC SAIJ80X135-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 135 mm stroke that can be dialed back by up to 75 mm, yielding a highly flexible 60 to 135 mm usable travel window for precise end-position tuning during machine commissioning. Delivering 2513 N of push force at 0.5 MPa, it bridges the gap between medium and large bore actuation.
This extruded aluminum profile cylinder includes variable air cushions at both ends and uses a robust 25 mm carbon steel piston rod with an M20x1.5 thread, which handles high side loads well. The rear stopper screw sets the retract travel limit but does not function as a lock, meaning live air pressure is required to hold a load. It supports a reduced set of ISO mounts (Basic, FA, LB, TC, FTC, TCM1, TCM2) and operates at speeds from 30 to 800 mm/s.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 135 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×135 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 Is Used
Product Changeover
Dial in the exact 60 to 135 mm retract distance on the fly when switching between product sizes on a packaging line, avoiding mechanical cylinder swaps.
Machine Setup
Fine-tune the end-of-stroke position during initial commissioning to perfectly time the 2513 N clamping or pressing action without adding external stopper blocks.
Adjustable Ejection
Control the ejection stroke of a machined part, using the 75 mm adjustment window to vary the drop distance based on downstream conveyor height.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 the Right Cylinder?
Select this 80 mm bore model when your application requires 2513 N of push force at 0.5 MPa, stepping up from the 50 mm bore (982 N) for heavier payloads, or stepping down from the 100 mm bore (3927 N) to save space. The 75 mm adjustment range is exceptionally wide, making it ideal for prototyping or product lines that undergo frequent size changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder for each new job.
For load-holding without continuous air pressure, note that this SAIJ rear adjuster acts only as a travel stop and will not brake or lock the load; you should instead specify an SAIL air-released lock cylinder or a BSAI clamp-lock variant. Since this unit lacks a magnet (-S), position sensing via CMSE or DMSE switches is not possible without modification. Ensure your setup matches the PT tapered port thread and the specified mounting hardware.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75 FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the effective stroke from 135 mm down to 60 mm. This provides a 75 mm tuning window to set the exact retract position without changing the cylinder.
At a 0.5 MPa operating pressure, it provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, the push force increases to 513 kgf.
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