Airtac JSI Series Standard Cylinder JSI80X300STC
The AirTAC Airtac JSI Series Standard Cylinder JSI80X300STC is a genuine double acting JIS-standard air cylinder with a Ø80mm bore and 300mm stroke, G3/8 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.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM22×1.5
- CushionAdjustable, 29 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 JSI80X300STC
Delivering 2513 N of push force at 0.5 MPa, the AirTAC JSI80X300STC is a double-acting JIS-standard profile cylinder built for tight machinery layouts. It is purposefully shorter and more compact than an ISO 15552 cylinder of the same 80 mm bore, saving valuable machine space without sacrificing power. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life.
This specific SKU includes a built-in piston magnet (-S), allowing CMSE or DMSE electronic switches to drop directly into the side sensor grooves for precise end-of-stroke detection. With a practical working load of roughly 1508 N, it can lift about 128 kg vertically with a 2:1 safety margin. The unit features a G3/8 port, an M22x1.5 rod thread, and adjustable 29 mm air cushions at both ends to smooth out deceleration.
Airtac JSI Series Standard Cylinder JSI80X300STC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI80X300STC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M22×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 29 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 JSI80X300STC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 80 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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 JSI80X300STC Is Used
Pallet Diversion
Uses the 2513 N push force at 0.5 MPa to positively divert heavy wooden pallets weighing up to 128 kg onto a secondary packaging line.
Press Ejection
Mounts via the TC trunnion to eject stamped metal parts from a 80-ton press, relying on the 29 mm adjustable cushions to absorb high kinetic energy.
Vertical Gate Lift
Raises a 120 kg mezzanine safety gate over the 300 mm travel, matching the vertical lift capacity while saving floor space versus standard ISO units.
Is the Airtac JSI Series Standard Cylinder JSI80X300STC the Right Cylinder?
When sizing this 80 mm bore actuator, consider the neighboring JSI variants: stepping down to the 63 mm bore drops the 0.5 MPa push force to 1559 N, while moving up to the 100 mm bore increases it significantly to 3927 N. The included TC trunnion mount provides a pivoting centerline axis that accommodates slight misalignment, which is particularly helpful for this 300 mm stroke. Because longer strokes amplify side-load risks and rod-bending moments, always use an external guide to support the load and prevent premature seal wear.
Note that a standard pneumatic cylinder drifts when air pressure is lost or the valve is centered, as the end cushions only decelerate the piston and do not act as a locking brake. If your application requires the load to be safely held in place during an air failure or emergency stop, integrate an external rod lock or a pilot-operated check valve into your circuit.
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 JSI80X300STC FAQ
This 80 mm bore cylinder delivers 2513 N push and 2268 N pull at 0.5 MPa, and 3518 N push and 3175 N pull at 0.7 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa. It uses a G3/8 air port and an M22x1.5 piston rod thread.
It is a JIS-standard profile cylinder that is physically shorter and more compact than an ISO 15552 cylinder of the same 80 mm bore, making it ideal for space-constrained machinery. The -S suffix indicates a built-in piston magnet, which is required to use CMSE or DMSE reed and electronic sensors in the side grooves.
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Standard models are processed and dispatched in 3-5 business days.
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