Airtac JSI Series Standard Cylinder JSI125X100
The AirTAC Airtac JSI Series Standard Cylinder JSI125X100 is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 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 JSI125X100
Delivering massive thrust in a tight footprint, the AirTAC JSI125X100 is a JIS-standard double-acting profile cylinder that occupies less machine space than an equivalent ISO 15552 unit. It pushes with 6136 N and pulls with 5734 N at 0.5 MPa, operating through a G1/2 port. The extruded hard-anodized aluminum barrel sheds 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 suffix, it cannot host CMSE or DMSE position switches. For sizing real tasks, plan for roughly 3682 N of actual work at 0.5 MPa, which translates to lifting about 313 kg vertically with a 2:1 safety margin. The adjustable 33 mm air cushions at both ends absorb kinetic energy smoothly, and the unit runs at speeds of 30-500 mm/s.
Airtac JSI Series Standard Cylinder JSI125X100 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X100 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 JSI125X100
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×100 | 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 JSI125X100 Is Used
Heavy Stamping Press
Generates 6136 N of push at 0.5 MPa to form thick sheet metal housings in automotive assembly lines.
Injection Mold Clamp
Holds large mold halves securely shut during plastic injection cycles, utilizing the 5734 N pull force.
Pallet Destacker
Lifts heavy loaded pallets weighing up to 313 kg vertically with a safe 2:1 mechanical margin.
Is the Airtac JSI Series Standard Cylinder JSI125X100 the Right Cylinder?
As the largest bore in the JSI range, there is no larger standard size to step up to; if 6136 N at 0.5 MPa is insufficient, you must add external pressure or duplicate the action. Stepping down to a JSI100 drops the push force to 3927 N at 0.5 MPa, making the 125 mm bore essential for heavy presses. Remember that this plain cylinder will drift if air is lost or the valve is centered, as the cushions only decelerate the piston near stroke ends and do not act as a brake. For suspended loads, specify an external rod lock or a pilot-operated check valve. You can mount it via LB foot, FA/FB flange, CA/CB/CR clevis, or TC trunnion, and pair it with an I, Y, F, or U knuckle.
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 JSI125X100 FAQ
This model features a G1/2 port and delivers 6136 N push / 5734 N pull at 0.5 MPa, 8590 N push / 8028 N pull at 0.7 MPa, and a theoretical maximum of 1251 kgf at 1.0 MPa. It uses an M27x2.0 rod thread and runs at 30-500 mm/s.
The JSI is a JIS-standard profile cylinder that is physically shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore, saving valuable space on machinery without sacrificing the 33 mm cushion stroke.
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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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