Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-10
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-10 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 JSIJ125X300-10
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty actuation into a footprint noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminium barrel keeps weight down while retaining rigidity. It handles about 3682 N of real work safely, translating to roughly 313 kg lifted vertically with a 2:1 margin. Air connects via a G1/2 port.
The -10 code denotes an external adjuster that lets you shorten the extend stroke on-site by up to 10 mm, giving a usable range of 290-300 mm for fine-tuning the end position without swapping the cylinder. The retract end remains fixed. This double-acting single-rod unit lacks a magnet, so it cannot take CMSE or DMSE sensors. The 33 mm adjustable air cushions at each end only decelerate the piston near stroke end; they do not hold the load on air loss, so fit an external rod lock or pilot-operated check valve for vertical holding.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-10 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-10 |
|---|---|
| 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 JSIJ125X300-10
| 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 JSIJ125X300-10 Is Used
Press Fit Tuning
Dial in the exact bottoming position of a heavy press over a 290-300 mm range using the external adjuster, avoiding mechanical hard-stops.
Pallet Stop Adjustment
Fine-tune the extend stop distance by 10 mm on-site to accommodate varying pallet widths without changing the cylinder mounting.
Heavy Fixture Actuation
Move large welding fixtures using the 6136 N push force, relying on the compact JIS profile to save valuable machine floor space.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-10 the Right Cylinder?
When sizing this 125 mm bore, stepping down to an 80 mm bore yields 2513 N push at 0.5 MPa, while this model provides 6136 N push and 5734 N pull at the same pressure. The 10 mm adjustable window is ideal for sharing a spare across stroke variants or dialing in final end positions on-site. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this SKU 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 JSIJ125X300-10 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. An external stop screw lets you shorten the extend stroke on-site by up to 10 mm, yielding a usable extend range of 290-300 mm. The retract end is fixed. This mechanism only sets the end position and does not lock the load.
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Standard models are processed and dispatched in 3-5 business days.
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