
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X175-20 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 175mm 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 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings compact power to tight assemblies. Its extruded hard-anodized aluminum barrel is noticeably shorter than an ISO 15552 cylinder of the same bore, saving machine footprint without losing strength.
The external adjuster lets you shorten the extend stroke on site by up to 20 mm, giving a usable range of 155 to 175 mm so you can fine-tune the end position without swapping the actuator. It handles about 377 N of real work, roughly 32 kg lifted vertically with a 2:1 margin. Pneumatic connections use a G1/4 port, and the retract end remains fixed.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X175-20 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×175 | 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 extend contact point within the 155 to 175 mm window on site to compensate for varying material thicknesses without machining new spacers.
Fit a short-stroke diverter into a tight transfer station, exploiting the compact JIS profile to save space while pushing light packages.
Keep one actuator on the shelf and adjust the stop screw down 20 mm to serve multiple machines with slightly different nominal extend requirements.
Size both ways against the bore scale: the 32 mm bore offers 402 N push at 0.5 MPa for lighter duties, while the 50 mm bore steps up to 982 N if your payload grows. The 20 mm adjustable window is ideal for sharing one spare across several stroke variants or trimming a tooling offset on the floor. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because this plain SKU lacks a magnet, it cannot take a CMSE or DMSE sensor; specify the -S variant if you need position detection. For any stroke at or above 300 mm, always guide the load to prevent side-load wear on the rod seal.
Quick checklist
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it provides 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. The air port is G1/4.
An external stop screw shortens the extend stroke by up to 20 mm on site, yielding a usable extend range of 155 to 175 mm while the retract end stays fixed. This mechanism only sets the end position; it does not hold the load on air loss. For load holding you must add an external rod lock or pilot-operated check valve.
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