Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-40 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 SAIJ80AX250-40
The AirTAC SAIJ80X250-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2513N of push force at 0.5MPa and provides a usable travel window of 210 to 250mm, letting you trim the retract position by up to 40mm. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops during machine commissioning.
This SKU is equipped with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, paired with a G3/8 PT tapered port. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. It supports AirTAC CMSE reed and DMSE electronic sensors, though this specific configuration ships without a magnet.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-40 |
|---|---|
| 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 SAIJ80AX250-40
| 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 SAIJ80AX250-40 Is Used
Product Size Changeovers
Quickly reconfigure the retract end position by up to 40mm when running different package sizes on the same conveyor line, avoiding physical hardware swaps.
Machine Commissioning
Fine-tune the 210 to 250mm travel window during setup to dial in exact stopping points without machining custom external spacers.
Variable End-Stop Positioning
Provide a mechanical dead-stop for a 2513N thrust application, allowing the rear screw to absorb final position variance rather than relying solely on the sensor signal.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-40 the Right Cylinder?
Choose this 80mm bore when an application requires roughly 2513N of thrust at 0.5MPa, stepping up from a 63mm bore that yields 1559N, or down from a 100mm bore providing 3927N. The 40mm adjustment range is ideal for product changeovers on a packaging line, allowing operators to dial in the exact end position without replacing the actuator. When specifying an ISO 15552 replacement, match the 80mm bore, 250mm nominal stroke, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), which omits FB, CA, CB, and CR brackets.
Because the 250mm stroke exceeds 300mm? No, but at 250mm it approaches unsupported lengths where side loads become critical. The 25mm rod diameter and M20x1.5 rod thread handle moderate side loading, but an external guide rail is still recommended for heavy off-center loads. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For dead-pilot or fail-safe load holding, select an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ80AX250-40 FAQ
At 0.5MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7MPa, the push force increases to 3518N.
The rear adjuster screw allows you to shorten the effective stroke from its 250mm nominal length down to 210mm. This creates a 40mm adjustable travel window for fine-tuning the end position at commissioning without changing the cylinder.
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