The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-100S 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 SAIJ50X185-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 185 mm stroke that can be dialed back by up to 100 mm, yielding a highly flexible 85-185 mm usable travel window for precise end-position tuning during commissioning. Delivering 982 N of push thrust at 0.5 MPa (1374 N at 0.7 MPa), it handles mid-range actuation tasks with ease.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, PT tapered port threads, and a built-in magnet (-S) for electronic or reed sensing. The extruded aluminum barrel includes sensor grooves on both sides, accommodating AirTAC CMSE reed and DMSE solid-state switches to verify piston position.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-100S |
|---|---|
| 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.
Rapidly shift the 85-185 mm travel window to accommodate different package lengths on a packaging line without replacing the cylinder.
Dial in the exact retract position during machine setup to prevent mechanical crashes and ensure precise clamping or pressing depth.
Use the 100 mm adjustment range to test multiple extend distances during prototyping before locking in a final mechanical stop.
Choose this 50 mm bore cylinder when an application requires substantial on-the-fly travel adjustments without swapping out the physical actuator. The 100 mm adjustment range is ideal for machines running multiple product sizes, allowing operators to fine-tune the retract end stop quickly. If your force requirements are lower, stepping down to a 40 mm bore yields 628 N at 0.5 MPa; for heavier loads, a 63 mm bore provides 1559 N.
Because this is a double-acting cylinder, the rear adjuster and variable air cushions only decelerate the travel end—they do not hold the load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. This SAIJ model shares the standard ISO 15552 mounting interface and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts (omitting FB, CA, CB, and CR).
Quick checklist
It features a rear stopper screw that lets you shorten the effective stroke by up to 100 mm. This turns the nominal 185 mm stroke into an adjustable 85-185 mm travel window, allowing precise end-position tuning without adding external stops.
At 0.5 MPa operating pressure, it provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
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