Airtac JSI Series Standard Cylinder JSI125X90
The AirTAC Airtac JSI Series Standard Cylinder JSI125X90 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 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 JSI125X90
Delivering 6136 N of push force at 0.5 MPa, this double-acting 125 mm bore cylinder handles heavy-duty automation with ease. Built to JIS standards, its extruded hard-anodized aluminum profile is noticeably shorter and more compact than an equivalent ISO 15552 unit, saving valuable machine space. The internal two-way piston seal retains grease for a long, low-friction service life.
Because this specific SKU lacks the -S magnet, it cannot host CMSE or DMSE position sensors. For sizing context, plan for about 3682 N of actual work at 0.5 MPa, which translates to lifting roughly 313 kg vertically with a 2:1 safety margin. The unit features a 32 mm rod, M27x2.0 rod thread, and a G1/2 port.
Airtac JSI Series Standard Cylinder JSI125X90 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X90 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 JSI125X90
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×90 | 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 JSI125X90 Is Used
Stamping Press Ejection
Provides the robust 6136 N push force needed to knock heavy stamped metal panels out of progressive die tooling.
Injection Mold Clamping
Secures heavy mold halves together in small plastic injection machines, utilizing the compact profile to fit tight guarding.
Pallet Stopper Gate
Acts as a high-strength physical stop barrier on heavy-duty pallet conveyors, halting loads weighing up to 313 kg safely.
Is the Airtac JSI Series Standard Cylinder JSI125X90 the Right Cylinder?
When sizing this 125 mm bore actuator, there is no larger standard JSI option available; if 6136 N at 0.5 MPa is insufficient, you would need to gang two cylinders or switch technologies. Stepping down to the 100 mm bore drops the output to 3927 N at 0.5 MPa, making this 125 mm unit the necessary choice for high-force tasks. The 90 mm stroke is well within standard limits and requires no special side-load considerations.
Remember that the adjustable 33 mm air cushions only decelerate the piston near the stroke ends; they do not act as a brake. If your application must hold a vertical load when air pressure drops or the valve centers, you must add an external rod lock or a pilot-operated check valve to prevent drift.
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 JSI125X90 FAQ
The JSI125X90 delivers 6136 N push and 5734 N pull at 0.5 MPa, and 8590 N push and 8028 N pull at 0.7 MPa. Its theoretical maximum force is 1251 kgf at 1.0 MPa. The air port size is G1/2, and it operates at speeds of 30-500 mm/s.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSE or DMSE magnetic switches. You would need the JSI125X90-S variant for position sensing. The cylinder still features standard mounting options like LB foot, FA flange, and TC trunnion.
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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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