Airtac JSI Series Standard Cylinder JSI125X1000FB
The AirTAC Airtac JSI Series Standard Cylinder JSI125X1000FB is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 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 JSI125X1000FB
Delivering massive thrust for heavy machinery, the AirTAC JSI125X1000FB pushes with 6136 N and pulls with 5734 N at 0.5 MPa. Built to JIS standards, this double-acting profile cylinder features an extruded hard-anodized aluminum barrel that is notably shorter and more compact than an equivalent ISO 15552 model of the same 125 mm bore. The internal two-way piston seal retains grease, ensuring low-friction operation over a long service life, while the adjustable 33 mm air cushions at both ends decelerate the heavy piston smoothly.
Because this SKU lacks the -S magnet suffix, it cannot accept CMSE or DMSE position switches without modification. For real-world sizing, plan for a safe working load of about 3682 N, which is roughly 60 percent of the 0.5 MPa push rating. In vertical lifting applications, this translates to lifting about 313 kg with a 2:1 safety margin. The unit connects via G1/2 ports and uses an M27x2.0 rod thread.
Airtac JSI Series Standard Cylinder JSI125X1000FB Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X1000FB |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 JSI125X1000FB
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×1000 | 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 JSI125X1000FB Is Used
Automotive Body Press
Provides the 8590 N push force at 0.7 MPa needed to clamp heavy stamping dies in automotive assembly lines.
Large Injection Molding
Actuates heavy mold halves over the 1000 mm travel, relying on external guides to maintain precise alignment.
Palletizer Ejection
Pushes fully loaded pallets off a conveyor, safely handling the 313 kg vertical lift equivalent with a 2:1 margin.
Is the Airtac JSI Series Standard Cylinder JSI125X1000FB the Right Cylinder?
When sizing this 125 mm bore, stepping down to a 100 mm cylinder reduces the 0.5 MPa push force to 3927 N, while no larger JSI bore exists above 125 mm. This specific model uses an FB flange mount, providing a rigid bolted interface for heavy structural attachment. Because the stroke is 1000 mm, the extended 32 mm rod is highly susceptible to side-loading and bending forces; always use external guide rails to support the load and prevent cylinder damage.
Note that a standard cylinder does not hold its position if air pressure drops or the valve is centered, as the piston will drift. The end cushions only decelerate motion near stroke end and do not act as a brake. To safely suspend a load, install an external rod lock or a pilot-operated check valve.
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 JSI125X1000FB FAQ
At 0.5 MPa this 125 mm bore cylinder pushes with 6136 N and pulls with 5734 N. At 0.7 MPa it pushes 8590 N and pulls 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses G1/2 air ports and an M27x2.0 rod thread.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore, saving machine space. It uses an FB flange mount. Note that because this specific SKU lacks the -S magnet, it cannot support CMSE or DMSE sensors.
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1-Year Warranty
Covers non-human-caused product damage.
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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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