Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20
The AirTAC SAIJ80X250-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 230 to 250 mm usable travel window, allowing you to dial back the nominal 250 mm stroke by up to 20 mm during commissioning. Delivering 2513 N of push force at 0.5 MPa, it handles substantial pneumatic workloads.
This variant uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and accepts PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20 |
|---|---|
| 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 | 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 SAIJ80AX250-20
| 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 SAIJ80AX250-20 Is Used
Machine Changeover
Quickly fine-tune the 230 to 250 mm travel window during product size changes on a packaging line without swapping out the entire cylinder.
End-Stop Calibration
Dial in the exact retract position during initial machine commissioning, absorbing mechanical tolerances by trimming up to 20 mm off the stroke.
Material Handling
Drive heavy diverters or lifting gates using the 2513 N push force, adjusting the travel end to accommodate varying package dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-20 the Right Cylinder?
Select this 80 mm bore cylinder when an application requires 2513 N push force at 0.5 MPa but needs precise end-position tuning without external stops. If your load demands less force, stepping down to a 63 mm bore yields 1559 N; if you need more power, a 100 mm bore provides 3927 N. The adjustable rear screw is strictly a travel stop, not a locking device, so it will not hold the load without live air.
For a 250 mm stroke, the 25 mm rod diameter provides good rigidity, but an external guide is recommended to prevent excessive side-loading on long extensions. This SAIJ model is dimensionally interchangeable per ISO 15552, uses PT ports, and omits FB, CA, CB, and CR mounting styles.
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 SAIJ80AX250-20 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 acts as a mechanical stop that lets you shorten the effective stroke from 250 mm down to 230 mm. It sets the travel end and relies on the air cushion for deceleration, but it does not lock or hold the load without continuous air pressure.
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