The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X125-10 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 125mm 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.
Generating 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder brings on-site flexibility to fixed-stroke pneumatics. Its hard-anodized aluminium barrel is noticeably shorter than a same-bore ISO 15552 unit, fitting tighter machine envelopes without losing power.
The external adjuster lets you shorten the extend stroke by up to 10 mm, giving a usable 115 to 125 mm range while leaving the retract end fixed. You can fine-tune the end position without swapping the cylinder. It handles about 589 N of real work, roughly 50 kg lifted vertically with a 2:1 margin. Pneumatic connections use a G1/4 port. Note that this base SKU lacks a magnet and cannot take CMSE or DMSE sensors.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X125-10 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 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). |
| ×125 | 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 115 to 125 mm extend position on-site to seat bearings without bottoming out the tooling.
Shorten the extend stroke by 10 mm to adjust a conveyor diverting arm for different package widths on the fly.
Use the shorter JIS profile body to fit a 50 mm bore stopper gate into a tight pallet handling cell.
Size this 50 mm bore against its neighbours: a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore jumps to 1559 N. Choose the 50 mm when you need roughly 982 N of push in a compact JIS footprint. The 10 mm adjustable window is ideal for sharing one spare cylinder across slightly different stroke variants or finalizing end positions during machine commissioning. Mounting options include FA, LB, TC, TCM1, and TCM2. For any stroke at or over 300 mm, use a guide rail to prevent side-load damage. Because this is a non-magnetized SKU, you cannot add position sensors; select the -S variant if you require CMSE or DMSE switches.
Quick checklist
At 0.5 MPa it provides 982 N push and 825 N pull. At 0.7 MPa it provides 1374 N push and 1154 N pull. The theoretical maximum force is 200 kgf at 1.0 MPa. It features a 20 mm piston rod, a G1/4 port, M18x1.5 rod thread, and 20.5 mm adjustable air cushions at both ends.
The nominal 125 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 10 mm, yielding a usable range of 115 to 125 mm. The retract end remains fixed. This stop sets the end position but does not lock the load; for load holding on air loss, use an external rod lock or pilot-operated check valve.
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