Airtac JSI Series Standard Cylinder JSI40X40
The AirTAC Airtac JSI Series Standard Cylinder JSI40X40 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 JSI40X40
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore unit handles compact automation tasks with ease. Built to JIS standards, its extruded hard-anodized aluminum profile is purposefully shorter than an ISO 15552 cylinder of the same bore, saving valuable machine space. The two-way piston seal retains grease for a long, low-friction service life.
Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches. For sizing your task, 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. It features a G1/4 port and adjustable air cushions at both ends to decelerate the piston smoothly.
Airtac JSI Series Standard Cylinder JSI40X40 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X40 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 JSI40X40
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×40 | 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 JSI40X40 Is Used
Small Part Clamping
Ideal for holding plastic or aluminum components during CNC drilling, utilizing its 628 N push force to secure parts without deformation.
Package Diverting
Provides a fast 40 mm stroke to push lightweight cardboard cartons from a main conveyor belt onto a secondary packaging line.
Press Fit Pins
Drives small dowel pins into electronic assemblies, relying on the hard-anodized barrel for consistent alignment over thousands of cycles.
Is the Airtac JSI Series Standard Cylinder JSI40X40 the Right Cylinder?
When sizing this actuator, compare it against its neighbors: a JSI32 offers 402 N push at 0.5 MPa, while stepping up to a JSI50 provides 982 N. This 40 mm bore sits perfectly in the middle for medium-duty clamping. Note that a standard cylinder drifts if air pressure is lost or the valve is centered, as the cushions only decelerate at stroke end and do not act as a brake. For secure load holding, install an external rod lock or a pilot-operated check valve.
Since this configuration has no -S suffix, it cannot support magnetic sensors. If your application requires position feedback, select the JSI40X40-S variant instead to enable CMSE or DMSE switches. With a 40 mm stroke, side-load concerns are minimal, but always ensure rigid mounting using LB foot, FA flange, or TC trunnion brackets.
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 JSI40X40 FAQ
This 40 mm bore cylinder features a G1/4 air port and an M14x1.5 rod thread. It generates 628 N push and 528 N pull at 0.5 MPa, increasing to 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
The JSI series uses an extruded aluminum barrel without external rods, making it physically shorter and more compact than an ISO 15552 cylinder of the same bore. This profile design is ideal for tight machine layouts while still offering adjustable air cushions at both ends.
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Genuine AirTAC parts produced by AirTAC factory.
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.
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