Airtac JSI Series Standard Cylinder JSI40X550
The AirTAC Airtac JSI Series Standard Cylinder JSI40X550 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 550mm 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
- Stroke550 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 JSI40X550
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 an ISO 15552 cylinder of the same 40 mm bore. The extruded hard-anodized aluminum barrel features no external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life across the 550 mm stroke. Air connects via a G1/4 port, and the unit runs at 30-800 mm/s.
Because this SKU lacks the -S magnet, it cannot accept CMSE or DMSE position sensors. For real-world sizing, 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 adjustable air cushions at both ends only decelerate the piston near stroke end; they do not function as a lock.
Airtac JSI Series Standard Cylinder JSI40X550 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X550 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 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 JSI40X550
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×550 | 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 JSI40X550 Is Used
Package Diverting
Pushes lightweight cardboard cartons at 30-800 mm/s across sorting lanes using a safe working load of 377 N.
Textile Loom Tensioning
Moves guide bars through the 550 mm travel, benefiting from the grease-retaining two-way piston seal for continuous duty.
Vertical Part Lifting
Raises small plastic bins weighing up to 32 kg vertically, matching the 2:1 safety margin derived from the 0.5 MPa push force.
Is the Airtac JSI Series Standard Cylinder JSI40X550 the Right Cylinder?
If 628 N of push at 0.5 MPa is insufficient, stepping up to the JSI50X550 provides 982 N, whereas dropping down to the JSI32X550 limits you to 402 N. For this 550 mm stroke, external guide rails are strongly recommended to prevent rod bending and absorb side loads, as long strokes are highly susceptible to deflection. Without an -S magnet, this specific SKU cannot host sensors, and since standard air cushions only decelerate the piston, an external rod lock or pilot-operated check valve is required to hold a load securely if air pressure is lost.
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 JSI40X550 FAQ
The JSI40X550 delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push and 739 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa. It uses a G1/4 air port and features a 16 mm piston rod with an M14x1.5 thread.
As a JIS-standard profile cylinder, the JSI40X550 is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. It uses a hard-anodized aluminum extrusion without external rods, saving footprint while retaining full functionality.
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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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