The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX180-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
The AirTAC SAIJ50X180-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window from 140 to 180 mm. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks without needing external stops. The barrel is extruded aluminum with sensor grooves on both sides for flexible mounting.
This configuration includes a SUS420J2 stainless steel rod for improved corrosion resistance and a -S magnet for position detection. It is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors. The rear adjuster acts purely as a mechanical stop to set the retract end position and does not hold the load without live air pressure.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX180-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max stroke | Up to 1200 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×180 | 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.
Quickly adjust the retract end-stop from 140 to 180 mm during packaging format changes without disassembling the machine.
Dial in the exact retract position during machine commissioning to compensate for mechanical tolerances on the fly.
Set precise travel limits for assembly presses that need to accommodate multiple part sizes on the same line.
Choose this 50 mm bore when you need more thrust than a 40 mm bore (628 N at 0.5 MPa) but want a smaller footprint than an 80 mm bore (2513 N at 0.5 MPa). The 40 mm adjustment range is ideal for product changeovers on a line, letting you dial in a new end position at commissioning without swapping the cylinder or adding external stops. For load-holding without live pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is a travel stop, not a lock.
To match this ISO 15552 replacement exactly, specify: 50 mm bore, 180 mm stroke, 40 mm adjustment, PT tapered ports, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on other variants.
Quick checklist
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can deliver up to 1374 N of push force at 0.7 MPa.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the nominal 180 mm stroke by up to 40 mm. This creates a usable travel window of 140 to 180 mm, which is set at commissioning without swapping the cylinder.
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