Airtac JSI Series Standard Cylinder JSI40X310S
The AirTAC Airtac JSI Series Standard Cylinder JSI40X310S is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 310mm 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
- Stroke310 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 JSI40X310S
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore unit handles 310 mm of travel with a built-in magnet for position sensing. As a JIS-standard profile cylinder, it is noticeably shorter and more compact than an ISO 15552 cylinder of the same bore, saving valuable space on tight machinery. The extruded hard-anodized aluminum barrel eliminates external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life.
Because the -S suffix denotes a piston magnet, you can drop CMSE or DMSE reed and electronic switches directly into the side sensor grooves. Plan for roughly 377 N of real work at 0.5 MPa, which means it lifts about 32 kg vertically with a 2:1 safety margin. The unit features a G1/4 air port, an M14x1.5 rod thread, and adjustable 20.5 mm air cushions at both ends to decelerate the payload smoothly.
Airtac JSI Series Standard Cylinder JSI40X310S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X310S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 310 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 JSI40X310S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×310 | 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 JSI40X310S Is Used
Packaging Diverter
Pushes lightweight cardboard cartons across a 310 mm transfer gap with a safe working load of 377 N at 0.5 MPa.
Small Parts Elevator
Raises electronic component trays weighing up to 32 kg vertically, relying on the -S magnet for precise top-position confirmation.
Tooling Indexer
Shifts an auxiliary machining head along a 310 mm path, using the hard-anodized barrel to withstand repetitive industrial cycling.
Is the Airtac JSI Series Standard Cylinder JSI40X310S the Right Cylinder?
For lighter duties, the 32 mm bore offers 402 N of push at 0.5 MPa, whereas stepping up to the 50 mm bore yields 982 N if you need to move heavier fixtures. This 310 mm stroke is well within the 1200 mm maximum for the 40 mm bore, but at this length you should support the load with external guides to prevent rod bending and premature seal wear from side loads. Remember that a standard cylinder drifts when air is lost or the valve is centered; the cushions only decelerate the piston near the end of stroke and will not hold a load. For vertical applications requiring position holding, fit 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 JSI40X310S FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it delivers 879 N push and 739 N pull, with a theoretical maximum of 128 kgf at 1.0 MPa. The air port is G1/4, the rod is 16 mm, and the rod-end thread is M14x1.5.
It is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore, giving you a space-saving footprint without sacrificing the 310 mm stroke. The -S magnet allows CMSE or DMSE sensors to slot directly into the side grooves for position detection.
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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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