Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X225-40
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X225-40 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 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 JSIJ125X225-40
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings serious power to your pneumatic setup. The hard-anodized aluminum barrel omits external rods, making the overall body shorter and more compact than a same-bore ISO 15552 unit. A G1/2 port feeds the chamber, driving a 32 mm rod with an M27x2.0 thread at speeds of 30-500 mm/s.
The external adjuster allows you to shorten the extend stroke on-site by up to 40 mm, giving a usable range of 185-225 mm without changing the cylinder itself. This on-site tuning is ideal for dialing in the exact end position. It handles about 3682 N of real work safely, roughly 313 kg lifted vertically. Note that this non-magnetic SKU cannot take a sensor; the -S variant is required for CMSE/DMSE switches.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X225-40 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X225-40 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 JSIJ125X225-40
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×225 | 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 JSIJ125X225-40 Is Used
Press Tonnage Trimming
Dial in the exact 185-225 mm extend position on-site to accommodate different material thicknesses in a light-duty stamping press without swapping actuators.
Pallet Stopper Calibration
Adjust the 40 mm extend window to fine-tune the stopping distance for varying pallet depths on a heavy-duty conveyor line before final indexing.
Heavy Vertical Plunge
Leverage the 6136 N push force to drive a heavy assembly tooling head downward, tuning the exact bottoming position via the external stop screw.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X225-40 the Right Cylinder?
When sizing this model, stepping down to the 100 mm bore drops the 0.5 MPa push force to 3927 N, while this 125 mm unit provides 6136 N. The adjustable window shines when you need to fine-tune end positions on-site or share a single spare across multiple stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. For any stroke length over 300 mm, always use a guide rail to prevent side-load damage. Because this plain cylinder lacks a magnet, it cannot accept position 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 JSIJ125X225-40 FAQ
At 0.5 MPa it pushes 6136 N and pulls 5734 N. At 0.7 MPa the push is 8590 N and pull is 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa.
The nominal 225 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke by up to 40 mm on-site, yielding a usable range of 185-225 mm. The retract end remains fixed. This stop sets the end position but does not hold the load; use an external rod lock or pilot-operated check valve for load holding.
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