Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX250-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S
The AirTAC SAIJ80X250-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 250 mm travel back by up to 75 mm, creating a highly flexible 175 to 250 mm usable window. This on-machine fine-tuning capability eliminates the need to swap cylinders or bolt on external stops during product changeovers.
Built for demanding environments, this variant features a SUS420J2 stainless steel rod for superior corrosion resistance and includes a built-in magnet for seamless position detection. It is fully compatible with AirTAC CMSE reed switches and DMSE solid-state sensors, fitting neatly into the dual-side sensor grooves. The rear adjuster acts purely as a mechanical stop to set the end position, while the adjustable air cushions at both ends manage deceleration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SAIJ80AX250-75S Is Used
Variable End-Stop Positioning
Ideal for packaging lines handling different carton sizes, allowing operators to quickly dial back the stroke from 250 mm down to 175 mm to accommodate varying package depths without changing tooling.
Machine Setup & Commissioning
Perfect for new equipment commissioning where the exact end-of-stroke contact point needs micro-adjustments on-site, using the rear stopper to perfect the kinematic chain without swapping physical cylinders.
Product Size Changeover Systems
Highly effective on automated assembly lines that run multiple product variants, enabling rapid changeover by adjusting the stroke window rather than repositioning heavy cylinder mounting brackets.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-75S the Right Cylinder?
The extensive 75 mm adjustment range is specifically chosen for machinery that processes varying product sizes, allowing operators to dial in the exact end-stop without hardware changes. Because the 250 mm stroke exceeds 300 mm only slightly, side-load is moderate, but an external guide is still recommended if the load is heavy or off-center. For exact replacement, match the 80 mm bore, 250 mm stroke, 75 mm adjustment, PT tapered ports, and the -S magnet requirement.
If your process demands holding the load in place without continuous live air pressure, note that the SAIJ rear adjuster is a travel stop and not a locking device. In those scenarios, you should explore the AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder series instead. The SAIJ80X250-75-S uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR foot and pivot options found on some standard cylinders.
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 SAIJ80AX250-75S FAQ
If you increase the supply to 0.7 MPa, the push force rises to 3518 N.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from its 250 mm nominal length down to as little as 175 mm. This creates a 175-250 mm travel window for fine-tuning end positions without replacing the cylinder.
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