Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S
The AirTAC JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø100mm bore and 300mm stroke, G1/2 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.
- BoreØ100 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM26×1.5
- CushionAdjustable, 33 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S
The hard-anodized aluminum extrusion omits tie rods entirely, and the G1/2 port handles the air volume needed for dynamic cycling between 30 and 800 mm/s. An integrated piston magnet (-S) allows CMSE or DMSE switches to drop directly into the side sensor grooves.
The -20 code defines a 20 mm external adjuster window that lets you shorten the extend stroke on-site from the 300 mm maximum down to 280 mm without swapping the cylinder, while the retract end remains fixed. Note that the adjustable stop only sets the end position; it does not lock the load, so you must add a pilot-operated check valve or external rod lock if you need to hold a suspended weight against gravity.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 300 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M26×1.5 |
| 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, 33 mm |
| Max standard stroke | Up to 1500 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).
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3525 N | 3525 N |
| 0.7 MPa | 4935 N | 4935 N |
| Max (@1.0 MPa) | 719 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).
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 100 | 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.
Where the Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S Is Used
Press Stroke Tuning
Dial in the exact 280 to 300 mm extend contact point on a light assembly press without machining new spacers or removing the cylinder from the machine.
Pallet Stop Gate
Control pallet flow on a 200 kg vertical lift line; the 100 mm bore provides the thrust needed, and the -S magnet confirms gate position for the PLC.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S the Right Cylinder?
When sizing this actuator, stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, while moving up to a 125 mm bore raises it to 6136 N. The 20 mm extend-shortening window is especially useful when you want a shared spare across slightly different stroke variants or need to fine-tune the end position after mechanical mounting. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. Because the -S variant includes a magnet for CMSE/DMSE sensors, you can track position along the full travel. With a 300 mm stroke, always support the load with an external guide to prevent rod bending and excessive side loading.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X300-20S FAQ
The theoretical maximum force is 801 kgf at 1.0 MPa. The air port size is G1/2.
The 300 mm stroke is the maximum extend travel. The external adjuster lets you shorten the extend stroke by up to 20 mm on-site, giving a usable extend range of 280 to 300 mm. The retract end is fixed, and this mechanism only sets the end position—it does not lock the load.
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Standard models are processed and dispatched in 3-5 business days.
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