Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-50S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX250-50S 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 SAIJ80AX250-50S
The AirTAC SAIJ80X250-50-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. The integrated -S magnet enables precise end-of-stroke detection using AirTAC CMSE reed or DMSE electronic solid-state sensors housed within the dual-side barrel grooves.
With a 250mm nominal stroke and a 50mm adjustment range, this SKU provides a usable travel window of 200-250mm. This allows operators to fine-tune the retract end-position during commissioning or product changeovers without swapping the cylinder. The piston rod is constructed from SUS420J2 stainless steel (code A) for enhanced corrosion resistance, and the PT tapered port threads ensure a reliable, leak-free pneumatic connection.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-50S |
|---|---|
| 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 SAIJ80AX250-50S
| 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 SAIJ80AX250-50S Is Used
Machine Changeover
Dial in the 200-250mm retract position during product size transitions without physically replacing the cylinder or adding external shims.
End-Position Tuning
Fine-tune the final stopping point of a heavy-duty press or lift at commissioning to achieve exact alignment using the rear stopper screw.
Adjustable Diversion
Vary the stroke length of a conveyor routing gate on the fly to accommodate different package dimensions on the processing line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-50S the Right Cylinder?
The 50mm rear adjuster acts purely as a mechanical stop to set the 200-250mm travel window; it does not hold the load without live air. For load-holding requirements without continuous pneumatic pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock. Because the 250mm stroke is substantial, an external guide should be used to support the load and mitigate side-loading on the rod.
To replace this cylinder with a standard ISO 15552 unit, match the 80mm bore, 250mm stroke, PT port threads, SUS420J2 rod material, and the -S magnet option. The SAIJ mounting hardware is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, deliberately omitting the FB, CA, CB, and CR styles found on some other profiles.
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 SAIJ80AX250-50S FAQ
The maximum thrust at 1.0 MPa is 513 kgf.
The rear adjuster screw allows you to shorten the effective travel from the 250mm nominal stroke by up to 50mm, creating a 200-250mm usable window. The adjuster serves as a travel stop and does not lock the load without live air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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