The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 185mm 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 SAIJ50X185-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 185 mm stroke that can be fine-tuned down by up to 10 mm, giving operators a precise 175-185 mm usable travel window during commissioning. Delivering 982 N of push force at 0.5 MPa, it bridges the gap between lighter 40 mm bores and heavier 63 mm units.
This variant features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet enables position detection with AirTAC CMSE reed or DMSE electronic solid-state switches.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 185 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. |
| ×185 | 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.
Dial in the exact 175-185 mm retraction point during machine commissioning to perfect part seating without swapping out the entire actuator.
Quickly adjust the rear stopper by up to 10 mm to accommodate slight variations in product sizes on a fast-paced packaging line.
Use the 982 N push force to secure workpieces, relying on the SUS420J2 stainless rod to resist corrosion in coolant-heavy environments.
Selecting this 50 mm bore makes sense when an application requires approximately 982 N of thrust at 0.5 MPa, avoiding the excess bulk of a 63 mm cylinder (which provides 1559 N). The 10 mm adjustment window is ideal for dialing in exact end positions without adding external stops. If your machine requires true load-holding without live air pressure, note that this rear adjuster acts only as a travel stop; you should instead explore an AirTAC SAIL or BSAI locking cylinder.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 50 mm bore, 185 mm stroke, 10 mm adjustment range, G1/4 port, PT tapered thread, and the -S magnet option. Because the stroke is under 300 mm, side-load stress is manageable, though long unsupported loads still require an external guide. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
Quick checklist
At a 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 1374 N push at 0.7 MPa.
The rear adjusting screw acts as a mechanical stop that shortens the effective stroke. For this model, it creates a 175-185 mm usable travel window, allowing fine-tuning of the end position without replacing the cylinder.
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