The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X100-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 100mm 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 is built for tight machinery where every millimetre counts. Its extruded hard-anodized aluminium barrel leaves out external rods, making the body noticeably shorter and more compact than a same-bore ISO 15552 unit. The integrated -S piston magnet allows CMSE or DMSE switches to clip directly into the side grooves for precise position sensing.
The -20 code means an external adjuster can shorten the extend stroke on-site by up to 20 mm, giving a usable range of 80 to 100 mm while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder, which is ideal for shared spares across stroke variants. Operating on a G1/4 port, it handles a safe working load of about 589 N, translating to roughly 50 kg lifted vertically with a 2:1 safety margin.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X100-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 100 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). |
| ×100 | 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 80 to 100 mm extend reach on a machining fixture to accommodate different part thicknesses without changing the cylinder.
Fine-tune the diverting arm end position on-site to handle varying package sizes on a packaging line.
Lift up to 50 kg in a tight vertical materials handling station where the shorter JIS profile saves valuable machine height.
When sizing this 50 mm bore, step down to a 40 mm cylinder for lighter duties (628 N push at 0.5 MPa) or move up to a 63 mm bore if your application needs 1559 N. The adjustable stroke shines when you need on-site end-position tuning or want a single spare to cover several stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because this SKU includes the -S magnet, it is ready for CMSE/DMSE sensors. For any stroke length at or over 300 mm, always use a guide rail to prevent side-load damage.
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. The air port size is G1/4.
The nominal 100 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke by up to 20 mm on-site, giving a usable extend range of 80 to 100 mm. The retract end is fixed. This stop only sets the end position; it is not a load lock.
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