Airtac JSI Series Standard Cylinder JSI125X175S
The AirTAC Airtac JSI Series Standard Cylinder JSI125X175S is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 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 JSI125X175S
Delivering massive thrust for heavy-duty automation, this double-acting JIS-standard profile cylinder generates 6136 N of push force and 5734 N of pull force at 0.5 MPa. The extruded hard-anodized aluminum barrel omits external rods entirely, making the unit noticeably shorter and more compact than a same-bore ISO 15552 cylinder to save valuable machine space. A heterogeneous two-way piston seal retains grease for long, low-friction service life.
Equipped with a built-in piston magnet, this -S variant directly accepts CMSE or DMSE reed and electronic sensors that drop into the side grooves for precise end-of-stroke detection. Plan for roughly 3682 N of real work at 0.5 MPa, which translates to lifting about 313 kg vertically with a 2:1 safety margin. The G1/2 air port feeds the 32 mm hard-chrome piston rod, while 33 mm adjustable air cushions at both ends decelerate the payload smoothly within the 30-500 mm/s speed range.
Airtac JSI Series Standard Cylinder JSI125X175S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X175S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 JSI125X175S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×175 | 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 JSI125X175S Is Used
Injection Mold Clamping
Provides the 6136 N push force required to secure heavy injection mold halves within compact machinery frames where overall cylinder length is restricted.
Palletized Goods Diversion
Drives heavy-duty diverting arms on packaging conveyors, using the 175 mm stroke to push loaded pallets onto secondary lines at speeds up to 500 mm/s.
Stamping Press Feed
Actuates robust feeding mechanisms on metal stamping lines, leveraging the 33 mm adjustable air cushions to decelerate the 32 mm rod smoothly under high kinetic loads.
Is the Airtac JSI Series Standard Cylinder JSI125X175S the Right Cylinder?
When sizing this 125 mm bore actuator, compare your actual load requirements against the neighboring bores: a 100 mm bore yields 3927 N push at 0.5 MPa, while the 125 mm provides 6136 N, and there is no larger standard JSI bore available for higher demands. The 175 mm stroke sits well within the 1500 mm maximum, avoiding the need for extended side-load guide supports required on strokes over 300 mm. Because the standard adjustable cushion only decelerates the piston near stroke end and provides no braking, you must add an external rod lock or pilot-operated check valve if the mechanism must hold a vertical load during air loss or valve centering. The included -S magnet ensures seamless integration with CMSE and DMSE position switches.
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 JSI125X175S FAQ
This 125 mm bore cylinder features a G1/2 air port and an M27x2.0 rod thread. It delivers 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push and 8028 N pull at 0.7 MPa, with a theoretical maximum force of 1251 kgf at 1.0 MPa.
The extruded aluminum profile construction is shorter and more compact than an ISO 15552 cylinder of the same bore, saving space without losing power. The -S suffix indicates a built-in magnet for CMSE/DMSE sensors, but note that air cushions only decelerate the piston; they do not lock the rod, so external holding valves are needed for fail-safe load gripping.
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Standard models are processed and dispatched in 3-5 business days.
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