
The AirTAC JSIJ32~50 Adjustable Cylinder JSIJ32X300-50S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø32mm bore and 300mm stroke, G1/8 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.
The hard-anodized aluminum extruded barrel keeps the assembly light, while the G1/8 port matches the bore size.
The -50 code means an external adjuster can shorten the 300 mm extend stroke on site by up to 50 mm, yielding a usable 250-300 mm range without changing the cylinder itself. The -S suffix adds a built-in piston magnet for CMSE/DMSE switches in the side grooves. Note that the air cushion only decelerates the piston near the ends; for load holding on air loss you need an external rod lock or pilot-operated check valve.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ32X300-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 300 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 mm |
| Max standard stroke | Up to 1000 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 | 346 N | 346 N |
| 0.7 MPa | 484 N | 484 N |
| Max (@1.0 MPa) | 70 kgf | |
JSIJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative).
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 32 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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.
Fine-tune the extend position of a small clamping jaw on site across a 250-300 mm window without swapping cylinders.
Fits into tight machinery spaces thanks to the JIS profile build, pushing light parts with 402 N at 0.5 MPa.
Stepping down is not an option here. The adjustable stroke is ideal for fine-tuning the extend end position on site or keeping one shared spare for slightly different stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because the 300 mm stroke creates leverage, always use an external guide to prevent rod bending and side loads. The -S magnet enables CMSE/DMSE sensors.
Quick checklist
This 32 mm bore cylinder pushes 402 N and pulls 345 N at 0.5 MPa. At 0.7 MPa it pushes 563 N and pulls 483 N. The theoretical maximum force is 82 kgf at 1.0 MPa. It uses a G1/8 air port and features a 12 mm rod with an M10x1.25 thread.
The nominal 300 mm extend stroke is the maximum. An external stop screw lets you shorten the extend stroke on site by up to 50 mm, giving a usable range of 250-300 mm. The retract end remains fixed. This stop sets the end position and does not lock the load.
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