Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50S 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 SAIJ80X240-50S
The AirTAC SAIJ80X240-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, utilizing a G3/8 PT tapered port and a 25 mm carbon steel rod. By integrating a magnet, it directly supports AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-position detection.
This model provides a 190-240 mm usable travel window, allowing you to trim the nominal 240 mm stroke by up to 50 mm during commissioning. The extruded aluminum barrel features sensor grooves on both sides, and the mounting hardware is limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50S |
|---|---|
| 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 SAIJ80X240-50S
| 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 SAIJ80X240-50S Is Used
Product Changeovers
Dial in the 190-240 mm travel window on the fly to accommodate varying package sizes on a packaging line without changing the cylinder.
End-Position Tuning
Fine-tune the retraction point during machine commissioning to perfect the seating force of a 25 mm carbon steel rod without adding external stops.
Assembly Stations
Use the adjustable stroke to set precise pressing depths, relying on the G3/8 PT port and air cushioning to manage the 2513 N thrust smoothly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50S the Right Cylinder?
Choose this adjustable-stroke cylinder when your machine setup requires fine end-position tuning or frequent product-size changeovers without swapping out the entire actuator. If you need less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa; stepping up to a 100 mm bore provides 3927 N. Since the 240 mm stroke is under the 300 mm threshold, side-load stress is moderate, but external guides are still recommended for heavy off-center loads.
The rear adjuster acts strictly as a mechanical stop to set the retraction end-point and relies on the integrated air cushion for deceleration. It does not hold the load without continuous live air pressure. For true load-holding capabilities without pneumatic pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock. This unit is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ80X240-50S 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 0.7 MPa, the push force increases to 3518 N.
The rear adjuster allows you to mechanically shorten the effective stroke by up to 50 mm, creating a 190-240 mm travel window. It functions as a hard stop for end-position tuning and does not lock the load without live air.
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