Airtac JSI Series Standard Cylinder JSI125X15
The AirTAC Airtac JSI Series Standard Cylinder JSI125X15 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 15mm 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
- Stroke15 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 JSI125X15
Delivering massive thrust in a tight footprint, this double-acting JIS-standard profile cylinder pushes with 6136 N and pulls with 5734 N at 0.5 MPa. The extruded hard-anodized aluminum barrel omits external rods entirely, making the unit notably shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore. A heterogeneous two-way piston seal retains grease for a long, low-friction service life.
For real-world sizing, plan for about 3682 N of actual work at 0.5 MPa, which safely lifts roughly 313 kg vertically with a 2:1 margin. The unit features a 32 mm carbon steel rod, M27x2.0 rod-end thread, and G1/2 air ports. Note this specific SKU lacks the -S magnet, meaning it cannot accept CMSE or DMSE position sensors.
Airtac JSI Series Standard Cylinder JSI125X15 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X15 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 15 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 JSI125X15
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×15 | 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 JSI125X15 Is Used
Heavy Press Stamping
Drives small high-tonnage stamping dies in automotive component lines where a 15 mm rapid impact stroke and 6136 N force are required.
Injection Molding Ejector
Ejects dense plastic or aluminum cast parts from molds, using its 313 kg vertical lift capacity to clear heavy tooling safely.
Pallet Stopper Gate
Acts as a heavy-duty stopper block on high-mass pallet conveyors, absorbing kinetic energy through its 33 mm adjustable cushions.
Is the Airtac JSI Series Standard Cylinder JSI125X15 the Right Cylinder?
As the largest bore in the JSI range, there is no larger standard size to step up to if you need more force; you would instead look at the 100 mm bore, which provides 3927 N push at 0.5 MPa. For any application requiring the piston to stay put after air loss or valve centering, remember the adjustable air cushion only decelerates the stroke at the ends and does not act as a brake. An external rod lock or pilot-operated check valve is required to hold loads securely.
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 JSI125X15 FAQ
At 0.5 MPa it delivers 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. Operating speed ranges from 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. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE switches; you must specify the -S variant for sensing.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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