The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX800-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 800mm 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 SAIJ50X800-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 800 mm stroke and a 30 mm adjustment range, it provides a usable travel window of 770-800 mm. This allows you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stoppers. The 50 mm bore delivers 982 N of push thrust at 0.5 MPa and 1374 N at 0.7 MPa.
This unit uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT (tapered) port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. It operates at speeds from 30 to 800 mm/s and utilizes adjustable air cushions at both ends to decelerate the load smoothly.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX800-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 800 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. |
| ×800 | 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 retract position within the 770-800 mm window during product size changes without machining new hard stops.
Adjust the travel end on the fly for packaging lines handling varying package lengths, using the rear screw to set the precise stop point.
Trim up to 30 mm of stroke during initial setup to align tooling perfectly, absorbing mechanical tolerances without cylinder removal.
Choose this 50 mm bore when your application requires roughly 982 N of push force at 0.5 MPa; stepping up to a 63 mm bore increases that to 1559 N, while dropping to a 40 mm bore reduces it to 628 N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product changeovers, offering flexibility a fixed-stroke SAI cannot match. To replace this cylinder, match the 50 mm bore, 800 mm stroke, 30 mm adjustment, PT G1/4 ports, and the SUS420J2 rod material.
Because the nominal stroke is 800 mm, an external guide is recommended to prevent excessive side-loading on the rod and rod thread. Note that the rear adjuster acts as a travel stop, not a lock; the SAIJ does not hold loads without live air. For true load-holding without pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Quick checklist
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, providing a usable travel window of 770-800 mm. It acts as a mechanical stop at the retract end, meaning the cylinder still requires live air to move and does not lock the load in place.
At 0.5 MPa operating pressure, the SAIJ50X800-30 provides 982 N of push thrust and 825 N of pull thrust. At 0.7 MPa, the push force increases to 1374 N.
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