Airtac JSI Series Standard Cylinder JSI125X200
The AirTAC Airtac JSI Series Standard Cylinder JSI125X200 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 JSI125X200
Generating 6136 N of push force at 0.5 MPa, this double-acting 125 mm bore JIS-standard profile cylinder is built for heavy-duty positioning. It uses a hard-anodized extruded aluminum barrel with no external rods, making it shorter and more compact than an ISO 15552 cylinder of the same bore. The heterogeneous two-way piston seal retains grease for long, low-friction life, while the 33 mm adjustable air cushions at both ends decelerate the massive moving load smoothly.
Because the 6136 N rating is theoretical, plan for about 3682 N of real work at 0.5 MPa, which translates to lifting roughly 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 in its side grooves. Pneumatic connections use a G1/2 port, and the 32 mm carbon steel rod features an M27x2.0 thread.
Airtac JSI Series Standard Cylinder JSI125X200 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X200 |
|---|---|
| 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 JSI125X200
| 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 JSI125X200 Is Used
Pallet Dispenser Ejection
Provides the heavy push force needed to separate empty pallets in automated palletizing lines, easily handling the high friction and weight.
Stamping Press Transfer
Moves heavy steel blanks between die stations in an automotive press line, utilizing the 200 mm stroke and 8590 N push at 0.7 MPa.
Heavy Carton Diverting
Actuates a robust diverting arm on a high-mass logistics conveyor, pushing densely packed freight onto a secondary sorting belt.
Is the Airtac JSI Series Standard Cylinder JSI125X200 the Right Cylinder?
As the largest bore in the JSI series, there is no larger standard size to step up to if this 125 mm model stalls; you would instead need to increase air pressure up to the 1.0 MPa maximum or use multiple cylinders. Stepping down, a 100 mm bore provides 3927 N push at 0.5 MPa, making this JSI125X200 the right choice only when that lower capacity is insufficient. For mounting, choose from LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, or an I/Y/F/U rod knuckle.
Remember that a standard pneumatic cylinder cannot hold a load in place if air pressure drops or the valve is centered; the piston will drift, as the end cushions only decelerate motion near stroke end and do not act as a brake. For suspended loads, install an external rod lock or a pilot-operated check valve. If you need position feedback, select the -S magnet variant instead of this SKU to enable CMSE or DMSE sensors.
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 JSI125X200 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull; at 0.7 MPa it yields 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. It operates at 30-500 mm/s, uses a G1/2 port, and has an M27x2.0 rod thread.
The JSI is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore, saving valuable machine space. It achieves this via an extruded aluminum barrel with no external rods, while still offering adjustable air cushions at both ends.
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