Airtac JSI Series Standard Cylinder JSI125X200FA
The AirTAC Airtac JSI Series Standard Cylinder JSI125X200FA is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 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 JSI125X200FA
Delivering massive thrust in a tight footprint, this double-acting JIS-standard profile cylinder is shorter and more compact than an ISO 15552 unit of the same 125 mm bore. It generates 6136 N of push force and 5734 N of pull at 0.5 MPa, scaling to a theoretical maximum of 1251 kgf at 1.0 MPa. The hard-anodized aluminum extrusion omits external rods entirely, while the two-way piston seal retains grease for extended, low-friction service life.
Because this specific SKU lacks the -S magnet option, it cannot accept CMSE or DMSE position sensors. For sizing real jobs, 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. The unit operates at 30-500 mm/s, features a 33 mm adjustable air cushion at both ends, and uses a G1/2 port with an M27x2.0 rod thread.
Airtac JSI Series Standard Cylinder JSI125X200FA Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X200FA |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 JSI125X200FA
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×200 | 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 JSI125X200FA Is Used
Press Fit Assembly
Drives heavy bearings into automotive transmission housings, utilizing the 8590 N push force available at 0.7 MPa to seat components reliably.
Injection Mold Clamping
Secures medium-tonnage mold halves on an FA flange mount, where the compact JIS profile saves valuable vertical machine space.
Pallet Positioning
Indexes loaded pallets up to 313 kg onto a conveyor line, benefiting from the grease-retaining NBR seal for continuous industrial duty.
Is the Airtac JSI Series Standard Cylinder JSI125X200FA the Right Cylinder?
As the largest bore in the JSI range, there is no larger standard size to step up to if 6136 N at 0.5 MPa is insufficient; you would need to explore a multi-cylinder setup or a different series entirely. Stepping down, a 100 mm bore provides 3927 N of push force, which is the nearest alternative if this model is overpowered for your application. This specific configuration includes an FA front-flange mount, ideal for securely bolting the cylinder face to a fixed bulkhead. Because the base cylinder has no -S magnet, it cannot host reed or solid-state sensors.
Note that the 200 mm stroke falls below the 300 mm threshold where side-load guidance becomes critical, but you should still ensure axial alignment. If your process requires the load to remain suspended during air loss or valve centering, be aware the piston will drift; the end cushions only decelerate the stroke and do not act as a brake. You must integrate an external rod lock or a pilot-operated check valve for secure load holding.
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 JSI125X200FA FAQ
This 125 mm bore cylinder features a G1/2 port, an M27x2.0 rod thread, and a 32 mm piston rod. 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.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore, saving space on machinery. However, it is not dimensionally interchangeable with ISO 15552. Also, because this SKU lacks the -S magnet, it cannot accept CMSE or DMSE sensors.
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