Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-100
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-100 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke300 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 JSIJ125X300-100
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a tight footprint. The extruded hard-anodized aluminium profile is noticeably shorter than a same-bore ISO 15552 unit. It handles about 3682 N of real work safely, which means lifting roughly 313 kg vertically with a 2:1 margin. Air connects via a G1/2 port.
The external stop screw lets you trim the extend stroke on-site by up to 100 mm, dropping the usable travel from the 300 mm maximum down to 200 mm without swapping the cylinder. The retract end remains fixed. Note this plain SKU lacks a magnet and cannot take CMSE/DMSE sensors. The 33 mm adjustable air cushions at both ends only decelerate the load near stroke end; they do not hold it on air loss, so fit an external rod lock for vertical safety.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-100 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-100 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 JSIJ125X300-100
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | 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 JSIJ125X300-100 Is Used
Heavy Pallet Lifts
Raises loaded pallets in packaging lines, using the 100 mm extend adjuster to fine-tune the exact discharge height on-site.
Press Ejection
Pushes finished parts out of a forming press, dialing back the 300 mm stroke by up to 100 mm to clear changing tooling.
Heavy Sorter Divert
Drives a heavy-duty diverter arm on a conveyor, shortening the extend stroke on the floor to match varying package widths.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-100 the Right Cylinder?
When sizing this actuator, the 125 mm bore sits at the top edge of the JSIJ range, delivering 6136 N push at 0.5 MPa. If your application only needs 3927 N, step down to the 100 mm bore. The 100 mm adjuster window is ideal for sharing one spare cylinder across several stroke variants, as you can fine-tune the end position on-site. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this unit lacks the -S suffix, it cannot accept magnetic sensors. For the 300 mm stroke, always support the load with external guides 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 JSIJ125X300-100 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa it provides 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. The air port size is G1/2.
The nominal 300 mm stroke is the maximum travel. An external stop screw lets you shorten the extend stroke by up to 100 mm on-site, giving a usable extend range of 200-300 mm. The retract end is fixed, and this stop mechanism 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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