Airtac JSI Series Standard Cylinder JSI125X700
The AirTAC Airtac JSI Series Standard Cylinder JSI125X700 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 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 JSI125X700
Delivering massive thrust for heavy machinery, this double-acting JIS-standard profile cylinder pushes with 6136 N and pulls with 5734 N at 0.5 MPa. Built with an extruded hard-anodized aluminum barrel, the JSI125X700 is specifically engineered to be shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore, saving valuable machine space. The internal two-way piston seal retains grease for long, low-friction life.
Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches without modifying the build. For sizing context, 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 operates at 30-500 mm/s.
Airtac JSI Series Standard Cylinder JSI125X700 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X700 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 JSI125X700
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×700 | 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 JSI125X700 Is Used
Injection Mold Clamping
Provides the heavy clamping force needed to hold large injection mold halves together securely over the 700 mm opening stroke.
Pallet Dispenser Pusher
Indexes empty pallets into high-speed packaging lines, utilizing the 6136 N push force to overcome stack friction.
Heavy Press Ejection
Ejects dense stamped metal parts from large press beds, where the 313 kg safe vertical lift capacity clears the tooling.
Is the Airtac JSI Series Standard Cylinder JSI125X700 the Right Cylinder?
Choosing this 125 mm bore means stepping up to the top of the JSI range, as there is no larger standard size available; if the load permits, dropping to the 100 mm bore reduces the push force to 3927 N at 0.5 MPa. Since this 700 mm stroke is substantial, you must support the load with external guides to prevent rod bending and premature seal wear under side loading. Remember that a standard cylinder drifts when air is lost or the valve is centered, so fit an external rod lock or pilot-operated check valve if the load must be held. The adjustable 33 mm air cushions at both ends only decelerate the piston near stroke end and do not act as a brake.
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 JSI125X700 FAQ
At 0.5 MPa it pushes with 6136 N and pulls with 5734 N. At 0.7 MPa the push is 8590 N and pull is 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. The air port is G1/2 and the piston rod thread is M27x2.0.
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 does not hold position if air is lost, as the cushions only decelerate the piston. For load holding, use an external rod lock. Also, this no-magnet SKU cannot take sensors.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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