Airtac JSI Series Standard Cylinder JSI40X900S
The AirTAC Airtac JSI Series Standard Cylinder JSI40X900S is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 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 JSI40X900S
Generating 628 N of push force at 0.5 MPa, this double-acting 40 mm bore unit is a JIS-standard profile cylinder that occupies less machine space than an equivalent ISO 15552 model. Its extruded hard-anodized aluminum barrel lacks external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life. Because the -S suffix provides a built-in magnet, you can drop CMSE or DMSE reed and electronic switches directly into the side grooves for position detection.
For practical sizing, plan for about 377 N of real work at 0.5 MPa, which safely lifts a 32 kg part vertically with a 2:1 margin. The G1/4 port feeds the 16 mm carbon steel rod, and the 900 mm stroke operates at speeds of 30-800 mm/s across a 0.15-1.0 MPa pressure range.
Airtac JSI Series Standard Cylinder JSI40X900S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X900S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 JSI40X900S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×900 | 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 JSI40X900S Is Used
Carton Push-Off Arm
Uses the 900 mm stroke to push packaged boxes cleanly from a wide packaging conveyor into a side divert lane.
Vertical Parts Elevator
Lifts 32 kg tote bins between floor levels on a materials handling line, relying on the 628 N push rating at 0.5 MPa.
Sample Tube Extraction
Pulls long test racks out of laboratory incubators, where the compact JIS profile saves valuable bench space.
Is the Airtac JSI Series Standard Cylinder JSI40X900S the Right Cylinder?
When sizing this 40 mm bore, dropping down to a 32 mm JSI drops the 0.5 MPa push force to 402 N, while stepping up to a 50 mm bore increases it to 982 N. The 900 mm stroke is a long extension, so you must support the load with external guides to prevent rod bending and premature seal wear. If the air supply drops or the valve is centered, the piston drifts because the adjustable 20.5 mm cushions only decelerate the stroke end rather than locking the load; add an external rod lock or pilot-operated check valve for secure holding.
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 JSI40X900S FAQ
The 40 mm bore provides 628 N push and 528 N pull at 0.5 MPa, or 879 N push and 739 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa. The air port is G1/4.
Yes, the -S suffix means it has a piston magnet for CMSE and DMSE switches in the side grooves. 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.
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Most inquiries answered within 7-8 hours.
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