Airtac JSI Series Standard Cylinder JSI125X180S
The AirTAC Airtac JSI Series Standard Cylinder JSI125X180S is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- 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 JSI Series Standard Cylinder JSI125X180S
Delivering massive thrust in a space-saving package, this double-acting JIS-standard profile cylinder pushes with 6136 N and pulls with 5734 N at 0.5 MPa. Its extruded hard-anodized aluminum barrel sheds the external rods of older designs, creating a shorter footprint than an ISO 15552 cylinder of the same 125 mm bore. The heterogeneous two-way piston seal retains grease for a long, low-friction service life.
Equipped with a G1/2 port and an M27x2.0 rod thread, the unit travels at 30-500 mm/s. The -S suffix indicates a built-in piston magnet, allowing CMSE or DMSE switches to drop directly into the side sensor grooves. For real-world sizing, plan for about 3682 N of actual work at 0.5 MPa, which means it lifts roughly 313 kg vertically with a 2:1 safety margin.
Airtac JSI Series Standard Cylinder JSI125X180S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X180S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| 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 JSI Series Standard Cylinder JSI125X180S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×180 | 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 JSI Series Standard Cylinder JSI125X180S Is Used
Heavy Press Stamping
Drives large stamping dies and metalforming presses where 6136 N of push force at 0.5 MPa is required to form thick steel blanks.
Pallet Lifting Station
Raises loaded industrial pallets in automated distribution hubs, safely moving the 313 kg vertical load capacity with a 2:1 margin.
Large Gate Actuation
Opens and closes heavy industrial fluid control gates on processing lines, utilizing the 5734 N pull force to secure the valve shut.
Is the Airtac JSI Series Standard Cylinder JSI125X180S the Right Cylinder?
If 6136 N of push at 0.5 MPa is excessive, the adjacent JSI100X200S offers 3927 N. There is no larger bore in the JSI line, so heavy loads requiring more than 8590 N at 0.7 MPa will need a different solution. The 180 mm stroke is well within the 1500 mm standard limit and avoids the side-load rod-bending risks seen in longer 300 mm+ strokes.
Remember that air cushions only decelerate the piston near the stroke ends; they do not act as a brake. If the machine loses air, the piston drifts, so install an external rod lock or pilot-operated check valve to hold a suspended load safely.
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 JSI Series Standard Cylinder JSI125X180S FAQ
At 0.5 MPa it pushes with 6136 N and pulls with 5734 N. At 0.7 MPa the push is 8590 N and pull is 8028 N. The theoretical maximum is 1251 kgf at 1.0 MPa, and the operational speed range is 30-500 mm/s.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore. The -S suffix means it has a built-in magnet for CMSE/DMSE sensors, and it uses a G1/2 air port.
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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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