The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-100 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 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 185 mm travel by up to 100 mm. This creates a wide 85-185 mm usable window, perfect for dialing in exact end positions during commissioning without swapping hardware. It delivers 982 N of push force at 0.5 MPa and features a SUS420J2 stainless steel piston rod for improved corrosion resistance.
This model uses PT tapered port threads (G1/4) and relies on variable air cushions at both ends to decelerate the load. The rear adjuster acts purely as a travel stop, meaning it cannot hold a load without continuous live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-100 |
|---|---|
| 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.
Leverage the 85-185 mm travel window to accommodate varying package sizes on the same machine without physically replacing the cylinder.
Fine-tune the retract stroke during initial commissioning to achieve exact material placement, avoiding the need for external mechanical stops.
Actuate diverter arms at varying distances to route products of different lengths down a single conveyor line.
Choose this 50 mm bore when an application requires around 982 N of thrust at 0.5 MPa but demands highly flexible end-position tuning. If you need less force, the 40 mm bore provides 628 N; if your load is heavier, stepping up to the 63 mm bore yields 1559 N. The massive 100 mm adjustment range on this SKU is ideal for product changeovers on a packaging line, whereas a fixed-stroke SAI cylinder is better suited for repetitive single-purpose tasks.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 185 mm stroke, PT port threads, and your required mounting style. SAIJ supports a reduced set of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this unit lacks the -S magnet option, it cannot host CMSE or DMSE sensors without modification.
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. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster screw lets you shorten the effective travel from its 185 mm nominal stroke down to 85 mm. It acts as a mechanical stop to set the retract position and does not lock the load without live air.
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