Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X25-20S
The AirTAC JSIJ100~125 Adjustable Cylinder JSIJ100X25-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø100mm bore and 25mm 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
- Stroke25 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 JSIJ100X25-20S
The hard-anodized aluminum profile barrel makes it shorter and more compact than a same-bore ISO 15552 cylinder.
The external stop screw provides a 20 mm window to shorten the extend stroke on site, giving a usable range of 5 to 25 mm from the nominal maximum while the retract end stays fixed. Air connects via a G1/2 port, and the built-in magnet works with CMSE/DMSE sensors in the side grooves. The 33 mm adjustable air cushions at both ends decelerate the load smoothly, though a plain cylinder drifts on air loss, so fit an external rod lock for held loads.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X25-20S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X25-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 25 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 JSIJ100X25-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 100 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | 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 JSIJ100X25-20S Is Used
Short-Stroke Clamping
Uses the 5 to 25 mm adjustable window to dial in exact clamping pressure on heavy machined parts without repositioning the fixture.
Heavy Product Stopping
Halts large pallets on a conveyor line, relying on the 33 mm cushions to absorb impact while the magnet confirms the stop position.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X25-20S the Right Cylinder?
The adjustable stroke is ideal for sharing one spare across multiple stroke variants or fine-tuning the end position without swapping the cylinder. You can mount it using FA, LB, TC, TCM1, or TCM2 brackets. The -S suffix means the piston magnet is present for CMSE/DMSE switches. Because the nominal stroke is 25 mm, side-load guide concerns are minimal, but always guide the rod for any stroke over 300 mm.
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 JSIJ100X25-20S FAQ
At 0.5 MPa it pushes 3927 N and pulls 3574 N. At 0.7 MPa it pushes 5497 N and pulls 5003 N. The theoretical maximum is 801 kgf at 1.0 MPa. The air port size is G1/2.
The nominal 25 mm stroke is the maximum extend length. The external adjuster lets you shorten the extend stroke on site by up to 20 mm, giving a usable range of 5 to 25 mm. The retract end is fixed, and the stop screw sets the end position rather than locking the load.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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