Airtac JSI Series Standard Cylinder JSI125X230S
The AirTAC Airtac JSI Series Standard Cylinder JSI125X230S 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 JSI125X230S
Delivering massive thrust for heavy-duty automation, this double-acting 125 mm bore cylinder pushes with 6136 N and pulls with 5734 N at 0.5 MPa. As a JIS-standard profile unit, its extruded hard-anodized aluminum body is notably shorter and more compact than an ISO 15552 cylinder of the same bore, saving valuable machine space. The internal two-way piston seal retains grease for a long, low-friction service life.
Because this SKU includes the -S magnet, you can drop CMSE or DMSE reed and electronic switches directly into the side sensor grooves for position detection. For real-world sizing, plan for about 3682 N of actual work at 0.5 MPa, which translates to lifting roughly 313 kg vertically with a 2:1 safety margin. The unit features a G1/2 port, an M27x2.0 rod thread, and adjustable 33 mm air cushions at both ends to decelerate the piston smoothly.
Airtac JSI Series Standard Cylinder JSI125X230S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X230S |
|---|---|
| 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 JSI125X230S
| 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 JSI125X230S Is Used
Stamping Press Feeder
Clamps and pushes heavy steel coils or blanks into a mechanical press, utilizing the 6136 N push force to overcome material friction and weight.
Pallet Handling Stopper
Acts as a heavy-duty end-stop or positioning gate on roller conveyors, securely halting loaded pallets weighing up to 313 kg vertically.
Injection Mold Ejection
Provides the high pull force required to extract large molded plastic parts from deep cavities, relying on the 5734 N pull at 0.5 MPa.
Is the Airtac JSI Series Standard Cylinder JSI125X230S the Right Cylinder?
When sizing this 125 mm bore model, verify your force requirements carefully since there is no larger standard JSI bore. If your application only needs 3927 N of push force at 0.5 MPa, stepping down to the 100 mm bore saves significant physical envelope and air consumption. This 230 mm stroke is well within standard limits, but for any stroke at or above 300 mm you must use a guide rail to prevent rod bending under side loads. The included -S magnet pairs perfectly with CMSE or DMSE sensors for end-of-stroke confirmation. Remember that standard pneumatic cylinders drift when air is lost or a valve is centered; the air cushion only decelerates the piston near the end caps and will not hold a load. For suspended loads, 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 JSI125X230S FAQ
This 125 mm bore cylinder uses a G1/2 air port and an M27x2.0 rod thread. The thrust ratings 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 is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. It uses an extruded aluminum barrel without external rods, and this specific SKU includes a built-in magnet (-S) for mounting CMSE or DMSE sensors in the side grooves.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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