Airtac JSI Series Standard Cylinder JSI40X225S
The AirTAC Airtac JSI Series Standard Cylinder JSI40X225S 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 JSI40X225S
Delivering 628 N of push force at 0.5 MPa, the AirTAC JSI40X225S is a double-acting JIS-standard profile cylinder built for tight machinery layouts. Because it uses an extruded hard-anodized aluminum barrel instead of external rods, the overall envelope is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. The internal two-way piston seal retains grease for a long, low-friction service life.
This -S variant includes a built-in piston magnet so CMSE or DMSE switches can drop directly into the side sensor grooves. Plan for around 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 port, an M14x1.5 rod thread, and adjustable air cushions at both ends to decelerate the piston smoothly over its 225 mm stroke.
Airtac JSI Series Standard Cylinder JSI40X225S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X225S |
|---|---|
| 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 JSI40X225S
| 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 JSI40X225S Is Used
Package Diverting
Pushes small cartons off a sorting line using the 628 N push rating, fitting neatly into compact conveyor framing.
Small Part Ejection
Ejects molded plastic parts from a press, utilizing the 225 mm stroke to clear the tooling area completely.
Bin Tray Indexing
Shifts lightweight storage trays horizontally, safely moving loads under the 32 kg vertical lift equivalent.
Is the Airtac JSI Series Standard Cylinder JSI40X225S the Right Cylinder?
When sizing this 40 mm bore, stepping down to a 32 mm version drops the 0.5 MPa push force to 402 N, while stepping up to a 50 mm bore raises it to 982 N. Because this is a 225 mm stroke, ensure your guiding structure handles any side-load to prevent rod bending, as the piston rod alone should not support lateral forces. The -S magnet is required if you intend to use CMSE or DMSE position sensors. Remember that air loss or a centered valve will cause the piston to drift; the end cushions only decelerate motion near stroke end rather than locking the load, so fit an external rod lock or pilot-operated check valve if you need to hold position.
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 JSI40X225S 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.
The JSI is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. It achieves this by using an extruded aluminum barrel without external rods, saving space while retaining dual-end adjustable air cushions.
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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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