Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20S 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 SAIJ80X240-20S
The AirTAC SAIJ80X240-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 240 mm stroke that can be dialed back by up to 20 mm, giving you a precise 220-240 mm usable travel window to perfectly tune end positions during machine commissioning. Featuring a carbon steel rod and a built-in magnet (-S) for CMSE reed and DMSE electronic sensors, it delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa.
This adjustable model uses an extruded aluminum barrel with sensor grooves on both sides and omits the FB, CA, CB, and CR mounts found on fixed variants, supporting only the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting set. The rear adjustment screw acts purely as a travel stop to set the retract end position, meaning it will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20S |
|---|---|
| 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 SAIJ80X240-20S
| 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 SAIJ80X240-20S Is Used
Machine Commissioning Tuning
Dial in the exact 220-240 mm retract position during initial setup without physically swapping out the cylinder or adding external shims.
Product Size Changeovers
Quickly adjust the end-stop by up to 20 mm on a packaging line when switching to a slightly different product size.
Mid-Range Thrust Actuation
Leverage the 2513 N push force at 0.5 MPa for moving heavier pallets or actuators that require precise end-position tweaking.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20S the Right Cylinder?
Choose this 80 mm bore when you need higher mid-range thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but want to avoid the bulk of a 100 mm bore (3927 N). The adjustable 220-240 mm window is ideal for product changeovers where exact end-of-stroke positioning varies slightly, eliminating the need to swap cylinders or add external stops. For position holding without continuous air pressure, this cylinder is not a lock; consider the AirTAC SAIL or BSAI series instead.
To match this ISO 15552 interchangeable cylinder for replacements, confirm the 80 mm bore, 240 mm stroke, 20 mm adjustment range, PT tapered port thread (G3/8), and the -S magnet option. Because the stroke is 240 mm, ensure your mounting setup handles side loads properly by using an external guide if the rod is unsupported.
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 SAIJ80X240-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it delivers a maximum push force of 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 240 mm nominal stroke by up to 20 mm, creating a 220-240 mm usable travel window. It only sets the end position and does not lock the load without live air pressure.
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