The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X125-100S 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.
Delivering 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder brings on-site flexibility to demanding pneumatics. Its hard-anodized extruded aluminum barrel keeps the overall body shorter and more compact than a same-bore ISO 15552 unit. The integrated -S magnet allows CMSE/DMSE sensors to drop directly into the side grooves for precise position detection.
The external stop screw provides a 100 mm adjustment window, letting you tune the usable extend stroke down from the 125 mm maximum to as little as 25 mm without swapping the cylinder. In practical terms, it handles a safe working load of roughly 589 N, which translates to lifting about 50 kg vertically with a 2:1 safety margin. Pneumatic connections use a G1/4 port, and the retract end remains fixed while you fine-tune the extend position.
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X125-100S |
|---|---|
| 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.
Adjusts the extend position on-site to clamp parts of varying heights without changing out the entire actuator.
Fine-tunes the gate extension length to accommodate different box widths on a packaging line.
Sets a precise upper travel limit for a 50 kg material lift, preventing mechanical overrun.
When sizing this unit, consider the neighboring bores: a 40 mm bore yields 628 N of push at 0.5 MPa, while a 63 mm bore steps up to 1559 N. The 50 mm bore is the ideal middle ground for medium-duty tasks. The adjustable stroke is particularly useful when you need to share a single spare cylinder across multiple stroke variants or fine-tune the end position on-site. JSIJ mounting options include FA, LB, TC, TCM1, and TCM2. The built-in -S magnet supports CMSE/DMSE switches. For any stroke length of 300 mm or longer, always use a guide rail to prevent excessive side loading and premature seal wear.
Quick checklist
At 0.5 MPa this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At 0.7 MPa it delivers 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 extend stroke is 125 mm, but the external adjuster lets you shorten that travel by up to 100 mm on-site. This means the usable extend stroke can be set anywhere from 25 mm to 125 mm. The retract end position remains fixed. Note that this stop mechanism only sets the end position; it does not lock the load.
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