Airtac JSI Series Standard Cylinder JSI40X275S
The AirTAC Airtac JSI Series Standard Cylinder JSI40X275S is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 275mm 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
- Stroke275 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 JSI40X275S
Delivering 628 N of push force at 0.5 MPa, the AirTAC JSI40X275S is a double-acting JIS-standard profile cylinder built for tight machinery layouts. Its extruded hard-anodized aluminum barrel omits external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. The 275 mm stroke operates at 30-800 mm/s, and the G1/4 port feeds the 16 mm rod to generate 528 N of pull force.
Because the SKU includes the -S suffix, a built-in piston magnet enables CMSE or DMSE switches to drop directly into the side sensor grooves. The heterogeneous two-way piston seal retains grease for low-friction life. For real-world sizing, plan for about 377 N of actual work at 0.5 MPa, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin.
Airtac JSI Series Standard Cylinder JSI40X275S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X275S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 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 JSI40X275S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | 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 JSI40X275S Is Used
Package Diverting
Pushes lightweight cartons off a packaging conveyor using 628 N of push force, fitting neatly into tight transfer stations.
Small Part Ejection
Ejects molded plastic parts from a 40 mm bore tooling plate, using the 275 mm stroke to clear the mold area completely.
Clamp Actuation
Actuates a secondary clamping jaw on an aluminum machining fixture, where the compact JIS profile saves valuable Z-axis space.
Is the Airtac JSI Series Standard Cylinder JSI40X275S the Right Cylinder?
If 628 N of push is too much, the smaller JSI32 bore drops the 0.5 MPa push force to 402 N; stepping up to the JSI50 increases it to 982 N. This 275 mm stroke falls safely within the 1200 mm maximum, but at this length you should support the load to prevent rod bending and side-load wear. Since air cushions only decelerate the piston near the end caps, fit an external rod lock or pilot-operated check valve if the load must be held during a pressure loss or valve centering. The -S magnet pairs directly with CMSE/DMSE sensors.
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 JSI40X275S FAQ
The 40 mm bore generates 628 N push and 528 N pull at 0.5 MPa, or 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum is 128 kgf at 1.0 MPa. It uses a G1/4 air port and an M14x1.5 rod thread.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. It uses an extruded aluminum barrel instead of external rods, and the -S magnet allows CMSE/DMSE sensors to track position.
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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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