Airtac JSI Series Standard Cylinder JSI40X800STC
The AirTAC Airtac JSI Series Standard Cylinder JSI40X800STC is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 800mm stroke, G1/4 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.
- BoreØ40 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable, 20.5 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 JSI40X800STC
Delivering 628 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than an ISO 15552 cylinder of the same 40 mm bore. 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. Because the SKU includes the -S suffix, a built-in piston magnet is present, allowing CMSE or DMSE electronic switches to drop directly into the side grooves for position sensing.
Plan for roughly 377 N of real work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin. The unit features a G1/4 air port, an M14x1.5 rod-end thread, and adjustable air cushions at both ends to smooth out deceleration over the 800 mm travel.
Airtac JSI Series Standard Cylinder JSI40X800STC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X800STC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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, 20.5 mm |
| Max standard stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 JSI40X800STC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×800 | 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 JSI40X800STC Is Used
Diverting Gate Actuation
Drives long-travel sorting gates on packaging conveyors, using the 800 mm stroke to fully open lanes for larger cartons while the TC trunnion handles the pivot arc.
Vertical Pallet Push-Off
Pushes lighter palletized goods transversely at transfer stations, safely moving loads under 32 kg with the 2:1 vertical lift margin in mind.
Test Fixture Separation
Pulls testing jigs apart slowly over the full 800 mm travel, relying on the 20.5 mm adjustable air cushions to prevent impact at the extremes of the stroke.
Is the Airtac JSI Series Standard Cylinder JSI40X800STC the Right Cylinder?
When sizing this 40 mm bore, dropping down to a 32 mm JSI reduces the push force to 402 N at 0.5 MPa, while stepping up to a 50 mm bore increases it to 982 N. The included TC trunnion mount provides a pivoting axis ideal for articulated mechanisms, but ensure your external linkage accommodates the 800 mm stroke length. Because 800 mm is a long extension, you must support the load with an external guide to prevent rod bending and premature seal wear from side-loading forces.
Remember that a standard cylinder does not hold its position if air pressure is lost or the valve is centered; the piston will drift. The adjustable cushions only decelerate the rod near the stroke ends and do not act as a brake. For a suspended 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 JSI40X800STC FAQ
At 0.5 MPa it provides 628 N push and 528 N pull; at 0.7 MPa it provides 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. The air port size is G1/4, and the piston rod thread is M14x1.5.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. The hard-anodized aluminum extrusion has no external rods, and the -S magnet allows CMSE/DMSE sensors to be fitted directly into the side grooves.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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