Airtac JSI Series Standard Cylinder JSI125X175
The AirTAC Airtac JSI Series Standard Cylinder JSI125X175 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 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 JSI125X175
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore double-acting actuator tackles heavy industrial tasks while maintaining a smaller footprint than a same-size ISO 15552 cylinder. The hard-anodized aluminum extrusion omits external rods entirely, and its two-way piston seal retains grease for a long, low-friction service life. Plan for roughly 3682 N of actual work at 0.5 MPa, which translates to lifting about 313 kg vertically with a 2:1 safety margin.
This specific SKU lacks the -S magnet, so it cannot accept CMSE or DMSE position switches without changing to the -S variant. It features a G1/2 port, an M27x2.0 rod thread, and a 33 mm adjustable air cushion at both ends to smooth out the 175 mm stroke within its 30-500 mm/s operating speed range.
Airtac JSI Series Standard Cylinder JSI125X175 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X175 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 JSI125X175
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×175 | 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 JSI125X175 Is Used
Stamping Press Feeder
Pushes heavy coil steel into a mechanical press, using the full 6136 N at 0.5 MPa to overcome material friction without stalling.
Pallet Dispenser
Lifts empty wooden pallets weighing up to 313 kg vertically from a magazine stack, operating comfortably within a 2:1 safety margin.
Injection Mold Ejector
Provides the brute extraction force needed to strip large molded plastic parts from deep cavities during automated unloading.
Is the Airtac JSI Series Standard Cylinder JSI125X175 the Right Cylinder?
As the largest bore in the JSI series, there is no larger standard size to step up to if 6136 N at 0.5 MPa is insufficient; you would need to parallel two cylinders or change series entirely. Stepping down, the 100 mm bore provides 3927 N of push force at 0.5 MPa, offering a lighter 801 kgf theoretical maximum if you do not need this model's 1251 kgf peak. Because this is a plain cylinder without a -S magnet, you must use external mechanical limit switches for end-position detection.
Air loss or a centered valve will cause the piston to drift, as the end cushions only decelerate motion near stroke limits rather than locking the rod. Install an external rod lock or pilot-operated check valve to suspend heavy loads safely. The 175 mm stroke is well within standard limits, but always mount via the LB foot, FA/FB flange, or TC trunnion options to prevent rod bending under high side loads.
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 JSI125X175 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. This 125 mm bore cylinder uses a G1/2 air port and an M27x2.0 rod thread.
No, this specific SKU does not include the -S magnet option, meaning CMSE and DMSE switches cannot be used. You must specify the -S variant if you require magnetic position sensing in the side grooves.
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