Airtac JSI Series Standard Cylinder JSI50X50S
The AirTAC Airtac JSI Series Standard Cylinder JSI50X50S is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 50mm 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.
- BoreØ50 mm
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM18×1.5
- 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 JSI50X50S
Delivering 982 N of push force at 0.5 MPa, the AirTAC JSI50X50S is a JIS-standard double-acting profile cylinder engineered for tight machinery layouts. Its extruded hard-anodized aluminum barrel omits external rods, making the overall body shorter and more compact than an equivalent ISO 15552 unit of the same 50 mm bore. The integrated -S piston magnet allows CMSE or DMSE switches to drop directly into the side grooves for precise position detection.
A heterogeneous two-way piston seal retains grease for a long, low-friction service life, while adjustable air cushions at both ends decelerate the rod near stroke limits. The G1/4 port and M18x1.5 rod thread match the 50 mm bore standard. Plan for roughly 589 N of actual work at 0.5 MPa, which translates to lifting about 50 kg vertically with a 2:1 safety margin.
Airtac JSI Series Standard Cylinder JSI50X50S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M18×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 JSI50X50S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×50 | 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 JSI50X50S Is Used
Package Diverting
Actuates diverting gates on medium-speed packaging conveyors, using the 50 mm stroke to push cartons cleanly onto adjacent lanes.
Pallet Stop Arms
Controls mechanical stop arms at palletizing stations, holding loads securely in place for robotic wrapping before releasing them downstream.
Clamp and Release
Secures aluminum extrusions during CNC machining operations, applying reliable clamping pressure and retracting quickly to clear the tool path.
Is the Airtac JSI Series Standard Cylinder JSI50X50S the Right Cylinder?
For lighter duties, the 40 mm bore provides 628 N of push at 0.5 MPa, whereas stepping up to the 63 mm bore yields 1559 N if you need substantially more force. Because this SKU includes the -S magnet, it is fully ready for CMSE or DMSE sensor integration. Remember that the standard air cushion only decelerates the piston near the end of travel; it will not hold a load vertically if air pressure drops. For suspended loads, install an external rod lock or a pilot-operated check valve to prevent drifting.
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 JSI50X50S FAQ
The 50 mm bore generates 982 N push and 825 N pull at 0.5 MPa, or 1374 N push and 1154 N pull at 0.7 MPa, with a theoretical maximum of 200 kgf at 1.0 MPa. The air port size is G1/4, and the rod-end thread is M18x1.5.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 50 mm bore, saving valuable space on machinery without sacrificing the 982 N push force.
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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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