Airtac JSI Series Standard Cylinder JSI40X225
The AirTAC Airtac JSI Series Standard Cylinder JSI40X225 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 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 JSI40X225
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than a comparable ISO 15552 unit. The extruded hard-anodized aluminum barrel omits external rods entirely, while a specialized two-way piston seal retains grease for extended, low-friction operation. Air connections use a G1/4 port.
Because this specific SKU lacks the -S magnet suffix, it cannot accept CMSE or DMSE position switches. For practical sizing, plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin. The unit operates at 30-800 mm/s and relies on a 20.5 mm adjustable air cushion at both ends to decelerate the stroke smoothly.
Airtac JSI Series Standard Cylinder JSI40X225 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X225 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 JSI40X225
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×225 | 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 JSI40X225 Is Used
Package Diverting
Pushes small totes at 90 degrees on a packaging line using 528 N of pull force at 0.5 MPa to retract the diverter arm quickly.
Pneumatic Clamping
Secures aluminum extrusions during a cutting operation, applying a safe 377 N of real-world clamping pressure without deforming the profile.
Component Insertion
Presses bronze bushings into machined housings on an assembly carousel, utilizing the 225 mm stroke to clear the tooling during part loading.
Is the Airtac JSI Series Standard Cylinder JSI40X225 the Right Cylinder?
When sizing this 225 mm stroke model, consider the neighboring bores: a JSI32 offers 402 N push at 0.5 MPa for lighter jobs, while stepping up to a JSI50 provides 982 N for heavier demands. Since this stroke exceeds 300 mm, ensure external guide rails are used to prevent rod bending and absorb side loads. This non-magnet version cannot hold a position if air pressure drops, as the cushion only decelerates the piston near stroke end rather than locking it; install a pilot-operated check valve for vertical load holding. Mounting options include LB foot, FA/FB flange, or TC trunnion.
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 JSI40X225 FAQ
The JSI40X225 has a 40 mm bore and a G1/4 port. It generates 628 N push and 528 N pull at 0.5 MPa, 879 N push and 739 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa.
It is a JIS-standard profile cylinder that is physically shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore, saving space without losing force capacity.
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Standard models are processed and dispatched in 3-5 business days.
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