
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-50 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
Delivering 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder builds shorter than a same-size ISO 15552 unit while completely avoiding external tie rods. The hard-anodized aluminum barrel keeps the assembly light, and the G1/4 port matches the standard bore mapping.
An external stop screw lets you trim the extend stroke by up to 50 mm on-site, dropping the usable forward travel from the 80 mm maximum down to 30 mm without swapping the cylinder. This on-site tuning means the unit handles about 589 N of real work safely, or roughly 50 kg lifted vertically with a 2:1 margin. The retract end stays fixed, and the adjustable air cushions only decelerate the piston near the ends rather than holding the load.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-50 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M18×1.5 |
| 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, 20.5 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
| 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.
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×80 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Dial in the exact clamp reach on a machining fixture by trimming the extend stroke up to 50 mm on-site, ensuring parts seat correctly without rebuilding the actuator.
Set a precise diverter arm angle on a packaging line by shortening the forward travel from the 80 mm maximum, accommodating different box widths on the fly.
Fit a short-stroke pusher into a tight machine cell using the compact JIS profile, adjusting the push distance locally as pallet sizes change.
Size this 50 mm bore against the 40 mm and 63 mm neighbors: the 40 mm yields 628 N push at 0.5 MPa while the 63 mm jumps to 1559 N, so pick the 50 mm when you need its specific 982 N output. The 50 mm extend-shortening window is ideal for sharing a single spare across multiple stroke variants or fine-tuning an end position after a fixture change. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because this SKU lacks the -S magnet, it cannot take CMSE or DMSE sensors; add the -S variant for position detection. For any stroke at or over 300 mm, guide the load externally to prevent side-load wear on the rod seal.
Quick checklist
At 0.5 MPa it pushes 982 N and pulls 825 N. At 0.7 MPa it pushes 1374 N and pulls 1154 N. The theoretical maximum force is 200 kgf at 1.0 MPa. The cylinder features a 20 mm rod, an M18x1.5 rod thread, and a G1/4 air port.
The nominal stroke is 80 mm, which is the maximum forward travel. The external adjuster lets you shorten the extend stroke on-site by up to 50 mm, giving a usable extend range of 30 to 80 mm. The retract end remains fixed. This mechanism sets the end position and does not hold the load; use an external rod lock or pilot-operated check valve if you need to hold a load on air loss.
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