Airtac JSI Series Standard Cylinder JSI40X240
The AirTAC Airtac JSI Series Standard Cylinder JSI40X240 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 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 JSI40X240
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore double-acting actuator fits tight machinery where a same-bore ISO 15552 cylinder would be too long. The extruded hard-anodized aluminum barrel removes external rods to resist wear, while the two-way piston seal retains grease for low-friction life. It is a practical choice for about 377 N of real work, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin.
Air connects via a G1/4 port, driving the 16 mm rod at 30-800 mm/s with 20.5 mm adjustable air cushions at both ends. Because this specific SKU lacks the -S magnet, it cannot host CMSE or DMSE position switches. For applications needing dual rod outputs or adjustable end-positions, consider the related JSID or JSIJ series.
Airtac JSI Series Standard Cylinder JSI40X240 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X240 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 JSI40X240
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×240 | 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 JSI40X240 Is Used
Package Diverter
Pushes light cartons off a sorting line using 628 N of thrust, fitting neatly into the conveyor frame.
Small Part Clamp
Secures aluminium extrusions during a sawing operation, clamping with a safe working load of 377 N.
Gate Actuator
Cycles a 240 mm stroke to open and close a lightweight machine guard door at 30-800 mm/s.
Is the Airtac JSI Series Standard Cylinder JSI40X240 the Right Cylinder?
If 628 N at 0.5 MPa is insufficient, the next size up is the 50 mm bore giving 982 N push; if you have excess capacity, dropping to the 32 mm bore yields 402 N. This 240 mm stroke is well within the 1200 mm maximum, but at this length you should support the load with an external guide to prevent rod bending and premature seal wear. Since air exhaust or a centred valve will let the piston drift, install an external rod lock or pilot-operated check valve if the load must be held. The cushion only decelerates the piston near the stroke ends and acts purely as an end-of-stroke buffer.
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 JSI40X240 FAQ
This 40 mm bore model uses a G1/4 port and generates 628 N push / 528 N pull at 0.5 MPa, and 879 N push / 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet, so CMSE or DMSE switches cannot be used. You would need the -S variant for sensing. It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC JSI Cylinders
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