Airtac JSI Series Standard Cylinder JSI125X180
The AirTAC Airtac JSI Series Standard Cylinder JSI125X180 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 JSI125X180
Delivering massive thrust for heavy machinery, the AirTAC JSI125X180 generates 6136 N of push force and 5734 N of pull at 0.5 MPa. Built to JIS standards, this double-acting actuator features an extruded hard-anodized aluminium barrel that is noticeably shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore, saving valuable machine space.
The robust construction uses a heterogeneous two-way piston seal that retains grease for a long, low-friction service life. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position sensors. For sizing practical payloads, plan for about 3682 N of real work at 0.5 MPa, which safely lifts around 313 kg vertically with a 2:1 margin.
Airtac JSI Series Standard Cylinder JSI125X180 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X180 |
|---|---|
| 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 JSI125X180
| 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 JSI125X180 Is Used
Heavy Stamp Press Feed
Pushes thick steel blanks into a 200-ton mechanical press, utilizing the 6136 N push force to overcome material friction and die resistance.
Pallet Dispenser Gate
Actuates the heavy diverter gate on an automated palletizing line, where the 313 kg safe vertical lift capacity easily manages the gate weight.
Injection Mold Clamp
Provides the secondary clamping force on a large plastic injection molding machine, taking advantage of the 180 mm stroke to clear the mold area.
Is the Airtac JSI Series Standard Cylinder JSI125X180 the Right Cylinder?
When sizing this 125 mm bore, stepping down to a 100 mm JSI yields 3927 N push at 0.5 MPa, while the 125 mm bore used here tops out at a theoretical 1251 kgf at 1.0 MPa. As this is the largest available JSI bore, there is no larger standard option for higher force demands. The G1/2 port and M27x2.0 rod thread handle the necessary high airflow and heavy mounting loads.
Remember that a standard cylinder will drift and cannot hold a load if air pressure drops or the valve is centered; the adjustable 33 mm cushions only decelerate the piston near stroke ends, so add an external rod lock or pilot-operated check valve for suspended loads. Since this SKU has no magnet, you must select a -S variant if your application requires CMSE or DMSE electronic switches.
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 JSI125X180 FAQ
This 125 mm bore cylinder provides 6136 N push and 5734 N pull at 0.5 MPa, increasing to 8590 N push and 8028 N pull at 0.7 MPa. The theoretical maximum force is 1251 kgf at 1.0 MPa, and the operating speed range is 30-500 mm/s.
No, this specific SKU does not include a magnet. To use CMSE or DMSE electronic switches in the side sensor grooves, you must purchase the -S variant of this JIS-standard profile cylinder, which is also shorter and more compact than a same-bore ISO 15552 unit.
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