Airtac JSI Series Standard Cylinder JSI40X275
The AirTAC Airtac JSI Series Standard Cylinder JSI40X275 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 JSI40X275
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore unit is built around a JIS-standard extruded aluminium profile that is noticeably shorter than an equivalent ISO 15552 cylinder. The hard-anodized barrel omits external rods to resist wear, while the internal two-way piston seal retains grease for low-friction service over long cycles. Operating pressure spans 0.15-1.0 MPa, and the G1/4 port matches the bore size.
For practical sizing, plan for roughly 377 N of real work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin. Because this specific SKU lacks the -S magnet, it cannot host CMSE or DMSE position switches. If your sequence control requires sensing, you must select the -S variant instead.
Airtac JSI Series Standard Cylinder JSI40X275 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X275 |
|---|---|
| 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 JSI40X275
| 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 JSI40X275 Is Used
Package Diverting
Pushes lightweight cardboard cartons off a sorting line using 628 N of thrust, fitting neatly into tight transfer chutes.
Parts Ejection
Clears small moulded plastic components from a press bed, utilizing the 275 mm stroke to clear the machine platen completely.
Pallet Positioning
Indexes empty pallets into a wrapping station where the compact JIS profile saves valuable floor space on the conveyor frame.
Is the Airtac JSI Series Standard Cylinder JSI40X275 the Right Cylinder?
When sizing this 275 mm stroke actuator, consider the adjacent bores: stepping down to a 32 mm bore drops the 0.5 MPa push force to 402 N, while stepping up to a 50 mm bore increases it to 982 N. Since this 275 mm stroke exceeds 300 mm, ensure external guide rails are used to prevent rod bending and absorb side loads. Remember that the adjustable end cushions only decelerate the piston near stroke end; they do not act as a brake. To prevent drift from gravity or air loss, install an external rod lock or a pilot-operated check valve.
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 JSI40X275 FAQ
This 40 mm bore cylinder features a G1/4 port and an M14x1.5 rod thread. The thrust output is 628 N push and 528 N pull at 0.5 MPa, increasing to 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet option, so it cannot accept CMSE or DMSE switches in the side grooves. You would need the -S variant for position sensing.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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