Airtac JSI Series Standard Cylinder JSI40X25SH
The AirTAC Airtac JSI Series Standard Cylinder JSI40X25SH is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 JSI40X25SH
Delivering 628 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than a same-bore ISO 15552 unit. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while a two-way piston seal retains grease for a long, low-friction service life. Because the -S magnet is present, CMSE or DMSE reed and electronic switches drop directly into the side grooves for position sensing.
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 G1/4 port feeds the 16 mm rod, and the -H option specifies a Viton/FKM high-temperature seal variant for demanding environments. Adjustable 20.5 mm air cushions at both ends absorb impact energy near the stroke limits.
Airtac JSI Series Standard Cylinder JSI40X25SH Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X25SH |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 JSI40X25SH
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | 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 JSI40X25SH Is Used
PCB Edge Clamping
Uses the 628 N push force to secure circuit boards during automated soldering, fitting easily into dense electronics assembly machinery.
Carton Flap Folding
Executes rapid 25 mm strokes to fold small cardboard flaps on high-speed packaging lines without consuming excessive vertical space.
Small Part Ejection
Pushes lightweight plastic components out of molding fixtures, leveraging the compact profile to minimize press footprint.
Is the Airtac JSI Series Standard Cylinder JSI40X25SH the Right Cylinder?
For sizing context, stepping down to a 32 mm bore drops the push force to 402 N, while moving up to a 50 mm bore increases it to 982 N at 0.5 MPa. This 40 mm bore with a 25 mm stroke fits perfectly into tight clamping mechanisms. If your application must hold a load vertically during an air loss or valve centering event, note that the piston will drift; the integrated cushion only decelerates the stroke end and acts as no brake. You must fit an external rod lock or pilot-operated check valve for secure load holding. Mounting options include LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, or an I/Y/F/U rod knuckle.
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 JSI40X25SH FAQ
This 40 mm bore cylinder features a G1/4 port and generates 628 N push / 528 N pull at 0.5 MPa, 879 N push / 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 shorter and more compact than an ISO 15552 cylinder of the same bore. The included -S magnet allows CMSE/DMSE switches to be installed in the side grooves for position detection.
Authorized Export Seller
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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