Airtac JSI Series Standard Cylinder JSI50X425
The AirTAC Airtac JSI Series Standard Cylinder JSI50X425 is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 425mm 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
- Stroke425 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 JSI50X425
Delivering 982 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable space on tight machines by being noticeably shorter than an ISO 15552 cylinder of the same 50 mm bore. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while a two-way piston seal retains grease for a long, low-friction service life. Plan for roughly 589 N of real work at 0.5 MPa, which translates to lifting about 50 kg vertically with a 2:1 safety margin.
Featuring a 425 mm stroke and a G1/4 air port, the unit operates at 30-800 mm/s with adjustable 20.5 mm air cushions at both ends to decelerate the piston smoothly. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches; you would need the -S variant for sensor grooves to be active. For tasks requiring adjustable reach, consider the related JSIJ type, or the JSID for a double-rod setup.
Airtac JSI Series Standard Cylinder JSI50X425 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X425 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 425 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 JSI50X425
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×425 | 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 JSI50X425 Is Used
Carton Diverting
Pushes corrugated cartons across a packaging conveyor using 982 N of thrust at 0.5 MPa, with the 425 mm stroke covering wide belt transfers.
Vertical Part Lifting
Hoists 50 kg tote bins between lower and upper roller lanes, relying on the compact JIS profile to fit within tight vertical elevators.
Guard Door Actuation
Opens and closes heavy machine safety guards, utilizing the hard-anodized barrel for reliable, low-friction cycling in industrial environments.
Is the Airtac JSI Series Standard Cylinder JSI50X425 the Right Cylinder?
When sizing this 50 mm bore, stepping down to a 40 mm bore drops the 0.5 MPa push force to 628 N, while stepping up to a 63 mm bore raises it to 1559 N. Because this is a 425 mm stroke, external guides are strongly recommended to prevent rod bending and premature seal wear under side loads. A plain cylinder drifts when air is lost or the valve is centered, so fit an external rod lock or pilot-operated check valve if the load must be held. Mounting options include LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, plus I, Y, F, or U rod knuckles.
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 JSI50X425 FAQ
At 0.5 MPa it provides 982 N push and 825 N pull; at 0.7 MPa it provides 1374 N push and 1154 N pull. The theoretical maximum force is 200 kgf at 1.0 MPa. It features a 50 mm bore, 425 mm stroke, G1/4 port, M18x1.5 rod thread, and 20.5 mm cushions.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. The air cushions only decelerate the piston near stroke end and do not act as a brake; the piston will drift if air is lost, so an external rod lock is needed to hold a load.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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