Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-40S 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 SAIJ80BX250-40S
The AirTAC SAIJ80X250-40-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 250 mm nominal stroke that can be dialed back by up to 40 mm, providing a usable travel window of 210-250 mm for precise end-position tuning at commissioning.
This variant includes a SUS304 stainless steel rod (code B) for enhanced corrosion resistance and pairs with PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet supports position detection with AirTAC CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40S |
|---|---|
| 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 SAIJ80BX250-40S
| 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 SAIJ80BX250-40S Is Used
Adjustable Machine Stops
Dial in the exact 210-250 mm retract position during setup or product changeover without installing external physical stops on the machinery frame.
Stainless Rod Actuation
Leverage the SUS304 stainless steel rod for medium-force pushing (2513 N at 0.5 MPa) in environments where moisture or light corrosion is a concern.
Sensor-Ready Positioning
Utilize the integrated magnet with DMSE electronic sensors to confirm the adjusted end-of-stroke position in automated assembly lines.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40S the Right Cylinder?
The 40 mm adjustment window is ideal for product-size changeovers on a line, allowing you to fine-tune the retract end-position without swapping the cylinder or bolting on external stops. For a fixed travel length without the need for commissioning adjustments, the standard SAI series is a simpler alternative.
Because the 250 mm stroke exceeds the 300 mm threshold, an external guide is recommended to prevent side-loading damage to the M20x1.5 rod thread and the SUS304 rod. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Remember that neither the rear adjuster nor the variable air cushions at both ends function as a lock; for fail-safe load holding without live air, consider the SAIL or BSAI series.
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 SAIJ80BX250-40S FAQ
The maximum thrust is 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 250 mm down to 210 mm. This creates a 40 mm tuning window for precise end-position calibration without changing the cylinder itself.
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