Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- 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 JSIJ125X25-30
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder handles heavy work safely. It manages about 3682 N of real work, which is roughly 313 kg lifted vertically with a 2:1 margin. The hard-anodized aluminium barrel keeps the overall build shorter and more compact than a same-bore ISO 15552 unit.
The external adjuster lets you shorten the extend stroke on-site by up to 30 mm, meaning the usable extend travel is 0-25 mm while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder. It uses a G1/2 port and runs at 30-500 mm/s. Note this SKU lacks a magnet and cannot take a CMSE/DMSE sensor.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | 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 JSIJ125X25-30 Is Used
Heavy Pressing
Tune the exact 0-25 mm extend contact point on-site for a heavy pressing or staking operation without shimming.
Short Clamping
Provides massive 6136 N clamping force in a tight JIS footprint, adjusting the stroke window to protect the part.
End Stop Tuning
Use the 30 mm adjuster to set a precise lower end position for heavy material stops in a high-force line.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X25-30 the Right Cylinder?
For lighter jobs step down to the 100 mm bore (3927 N push at 0.5 MPa), or step up if you need the absolute maximum 1251 kgf at 1.0 MPa. The -30 mm adjuster is perfect for sharing one spare across slight stroke variants and tuning the end position on-site. Mounting options include FA, LB, TC, TCM1 and TCM2. Because this plain cylinder drifts on air loss, use an external rod lock or pilot-operated check valve to hold a load. Add the -S variant if you need CMSE/DMSE sensors.
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 JSIJ125X25-30 FAQ
At 0.5 MPa it pushes 6136 N and pulls 5734 N. At 0.7 MPa it pushes 8590 N and pulls 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. This 125 mm bore unit uses a G1/2 port.
The nominal 25 mm extend stroke is the maximum. The external stop screw lets you shorten that extend travel on-site by up to 30 mm, yielding a usable extend stroke of 0-25 mm. The retract end is fixed. This mechanism sets the end position and is not a load lock.
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Covers non-human-caused product damage.
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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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