Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S
The AirTAC SAIJ80X240-30-S is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the retract stroke by up to 30 mm. This yields a usable travel window of 210-240 mm, allowing you to dial in the exact end position during commissioning without adding external stops. Built with a carbon steel piston rod and PT tapered G3/8 ports, it delivers 2513 N of push thrust at 0.5 MPa and 4523 N at 0.9 MPa.
Because this is an -S variant, the extruded aluminum barrel includes a magnet for position sensing. It works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The rear adjuster acts purely as a travel stop for end-position tuning, meaning it cannot hold a load without live air pressure. For load-holding requirements, explore the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAIJ80X240-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SAIJ80X240-30S Is Used
Machine Changeover
Dial in the 210-240 mm travel window during product size changes to set new end positions rapidly without changing the cylinder.
End-Position Tuning
Fine-tune the retract stop during commissioning to absorb mechanical tolerances and achieve precise clamping without external shims.
Variable Stops
Adjust the stroke on the fly for diverter gates or positioning stops handling varying package sizes on a packaging line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-30S the Right Cylinder?
Selecting this 80 mm bore makes sense when your application requires the 2513 N push force at 0.5 MPa, bridging the gap between the 63 mm bore (1559 N) and the 100 mm bore (3927 N). The adjustable 30 mm stroke window is ideal for machines that undergo frequent product-size changeovers, replacing the need to physically swap out a fixed-stroke SAI cylinder. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB and rear pivot options.
To match this ISO 15552 cylinder for a retrofit, specify: 80 mm bore, 240 mm nominal stroke, 30 mm adjustment range, PT G3/8 port thread, and the -S magnet. The 25 mm rod and M20x1.5 thread provide robust side-load resistance, but because the stroke is 240 mm, you should still use an external guide to prevent rod binding. Note that the rear adjuster and variable air cushions decelerate the load but do not function as a lock.
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 SAIJ80X240-30S FAQ
The rear adjuster acts as a mechanical stop that shortens the effective stroke by up to 30 mm, giving a usable travel window of 210-240 mm. It sets the end position but does not lock the load without live air pressure.
At 0.5 MPa operating pressure, it provides 2513 N of push thrust and 2268 N of pull thrust. At 0.9 MPa, the push force increases to 4523 N.
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