Airtac JSI Series Standard Cylinder JSI125X200FB
The AirTAC Airtac JSI Series Standard Cylinder JSI125X200FB 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 JSI125X200FB
Delivering massive thrust in a tight footprint, the AirTAC JSI125X200FB is a double-acting JIS-standard profile cylinder that is physically shorter and more compact than an ISO 15552 unit of the same 125 mm bore. It generates 6136 N of push force at 0.5 MPa, making it a powerhouse for heavy-duty machinery. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life.
Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches. For practical sizing, plan for about 3682 N of real work at 0.5 MPa, which safely lifts roughly 313 kg vertically with a 2:1 margin. The unit features a G1/2 port, an M27x2.0 rod thread, and an FB flange mount interface for secure attachment.
Airtac JSI Series Standard Cylinder JSI125X200FB Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X200FB |
|---|---|
| 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 JSI125X200FB
| 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 JSI125X200FB Is Used
Heavy Press Clamping
Provides 6136 N of push force at 0.5 MPa to secure thick steel plates in an automotive stamping press.
Injection Molding Ejector
Uses the 200 mm stroke to push heavy molded plastic parts clear of the tool cavity before robotic extraction.
Pallet Stopper Gate
Acts as a robust 125 mm bore stopper mechanism in high-mass pallet conveyor lines, halting loads safely.
Is the Airtac JSI Series Standard Cylinder JSI125X200FB the Right Cylinder?
If 6136 N at 0.5 MPa is excessive, the next bore down is the JSI100, which outputs 3927 N of push force. There is no larger bore in the JSI series, so for forces beyond 6136 N you must split the load across two cylinders. The FB flange mount provided on this model handles high axial loads securely. Note that a standard cylinder drifts when air is lost or the valve is centered; the adjustable 33 mm air cushions only decelerate the piston near stroke ends. To hold a load securely, install an external rod lock or a pilot-operated check valve. Without the -S magnet, this version cannot host 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 JSI125X200FB FAQ
The JSI125X200FB delivers 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 max of 1251 kgf at 1.0 MPa. The air port is G1/2 and the piston speed range is 30-500 mm/s.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore. It uses an FB flange mount, but since this SKU lacks the -S magnet, it cannot accept CMSE or DMSE sensors.
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Standard models are processed and dispatched in 3-5 business days.
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