Airtac JSI Series Standard Cylinder JSI50X400
The AirTAC Airtac JSI Series Standard Cylinder JSI50X400 is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 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 JSI50X400
Delivering 982 N of push force at 0.5 MPa, this double-acting 50 mm bore JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than an equivalent ISO 15552 unit. The extruded hard-anodized aluminum barrel omits external rods entirely, while a specialized two-way piston seal retains grease for extended, low-friction operation. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches.
With a 400 mm stroke, plan for roughly 589 N of actual working load at 0.5 MPa to maintain a safe 0.6 ratio, which translates to lifting about 50 kg vertically with a 2:1 margin. The unit features a G1/4 port, an M18x1.5 rod thread, and 20.5 mm adjustable air cushions at both ends to smooth out deceleration.
Airtac JSI Series Standard Cylinder JSI50X400 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X400 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 JSI50X400
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×400 | 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 JSI50X400 Is Used
Carton Pusher Diverter
Pushes medium-weight cardboard cartons across a packaging line, utilizing the 400 mm stroke to clear a wide conveyor belt.
Vertical Parts Elevator
Lifts approximately 50 kg of stacked metal trays between machine levels, requiring an external guide to stabilize the long rod extension.
Pneumatic Indexing Gate
Actuates a safety guard on an automated assembly cell, taking advantage of the compact JIS profile to fit within tight column clearances.
Is the Airtac JSI Series Standard Cylinder JSI50X400 the Right Cylinder?
When sizing this 50 mm bore option, dropping down to a 40 mm bore reduces the push force to 628 N at 0.5 MPa, whereas stepping up to a 63 mm bore increases it to 1559 N. For the 400 mm stroke specifically, you must account for side loads and rod-bending moments—using an external guide rail is strongly recommended to prevent premature seal wear. Because this is a non-magnet SKU, position sensing is unavailable unless you switch to an -S variant. Furthermore, standard air cushions only decelerate the piston near the stroke ends and will not hold a load if air pressure drops; install an external rod lock or pilot-operated check valve for vertical safety.
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 JSI50X400 FAQ
This 50 mm bore cylinder uses a G1/4 port and generates 982 N push / 825 N pull at 0.5 MPa, and 1374 N push / 1154 N pull at 0.7 MPa. The theoretical maximum force is 200 kgf at 1.0 MPa.
No, because this specific SKU does not include the -S magnet, it cannot accept CMSE or DMSE switches. You must select the -S variant to enable side-groove sensor mounting.
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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.
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Most inquiries answered within 7-8 hours.
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