Airtac JSI Series Standard Cylinder JSI125X230
The AirTAC Airtac JSI Series Standard Cylinder JSI125X230 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 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 JSI125X230
Delivering 6136 N of push force at 0.5 MPa, this double-acting 125 mm bore cylinder is built for heavy-duty automation. As a JIS-standard profile unit, its extruded hard-anodized aluminum barrel omits external rods, making it shorter and more compact than an equivalent ISO 15552 cylinder of the same bore. The internal two-way piston seal actively retains grease, ensuring low-friction operation over a long service life.
With a 230 mm stroke, it provides substantial travel while offering a practical safe working load of about 3682 N for real-world tasks. This translates to lifting roughly 313 kg vertically with a 2:1 safety margin, letting you match the cylinder to heavy part weights directly. The unit features a G1/2 port, a 32 mm piston rod with an M27x2.0 thread, and adjustable 33 mm air cushions at both ends to smooth out deceleration. Note that this specific SKU lacks a magnet, so it cannot accept CMSE or DMSE position switches without upgrading to the -S variant.
Airtac JSI Series Standard Cylinder JSI125X230 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X230 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 JSI125X230
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×230 | 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 JSI125X230 Is Used
Heavy Pallet Lifting
Drives the elevation platform on automated pallet handlers, using its 6136 N push force to raise heavy loads smoothly within packaging lines.
Stamping Press Feed
Pushes thick metal blanks into a hydraulic stamping press, where the 33 mm adjustable air cushions absorb the kinetic energy at the end of the 230 mm stroke.
Large Mold Actuation
Indexes heavy injection molds along an assembly track, benefiting from the compact JIS profile to save valuable machine floor space.
Is the Airtac JSI Series Standard Cylinder JSI125X230 the Right Cylinder?
When sizing this 125 mm bore model, consider the adjacent JSI options to match your exact force requirements. Stepping down to the 100 mm bore drops the 0.5 MPa push force to 3927 N, while the 125 mm bore used here provides 6136 N; as 125 is the largest available JSI bore, any higher force demands a different cylinder family entirely. For this 230 mm stroke, side-load risks are moderate, so ensure your mounting—whether LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, or an I/Y/F/U rod knuckle—aligns the load precisely to prevent rod bending. Remember that a standard cylinder drifts when air is lost or the valve is centered; the air cushion only decelerates the piston near stroke end and acts as no lock. To hold a suspended load safely, install an external rod lock or a pilot-operated check valve.
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 JSI125X230 FAQ
This 125 mm bore cylinder features a G1/2 port and an M27x2.0 rod thread. The thrust outputs are 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push and 8028 N pull at 0.7 MPa, with a theoretical maximum of 1251 kgf at 1.0 MPa. It operates at speeds between 30 and 500 mm/s.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore, utilizing an extruded aluminum barrel without external rods. It does not hold its load if air pressure is lost; the cushions only decelerate the piston near stroke ends, so an external rod lock is needed for holding.
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Standard models are processed and dispatched in 3-5 business days.
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