Airtac JSI Series Standard Cylinder JSI50X800S
The AirTAC Airtac JSI Series Standard Cylinder JSI50X800S is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 800mm 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
- Stroke800 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 JSI50X800S
Delivering 982 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 equivalent of the same 50 mm bore. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life across its 800 mm travel.
Fitted with a G1/4 port and an M18x1.5 rod thread, the unit includes an -S piston magnet so CMSE or DMSE sensors can drop directly into the side grooves for position detection. 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 JSI50X800S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X800S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 800 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 JSI50X800S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×800 | 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 JSI50X800S Is Used
Textile Beam Indexing
Moves heavy fabric beams across an 800 mm gap during automated weaving machine changeovers, utilizing the 982 N push force at 0.5 MPa to shift the load smoothly.
Pallet Transfer Gate
Actuates a diverter gate over an 800 mm stroke on packaging lines, relying on the compact JIS profile to fit within tight conveyor frame clearances.
Vertical Shelf Extraction
Lifts components weighing up to 50 kg out of high-density storage racks, taking advantage of the built-in -S magnet to trigger shelf-clearance sensors.
Is the Airtac JSI Series Standard Cylinder JSI50X800S the Right Cylinder?
When sizing this 800 mm stroke model against its neighbors, stepping down to the 40 mm bore drops the 0.5 MPa push force to 628 N, whereas moving up to the 63 mm bore raises it to 1559 N. Because the standard JSI is double-acting, it will not hold a load if air pressure is lost or the valve is centered—the piston will drift, as the adjustable 20.5 mm cushions only decelerate the stroke near the end points. To secure a suspended load, specify an external rod lock or a pilot-operated check valve.
Given the 800 mm extension, carefully manage side loads to prevent rod bending by incorporating external guide rails to support the payload. The -S magnet on this SKU makes it fully compatible with reed or electronic CMSE/DMSE switches for precise end-position feedback.
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 JSI50X800S FAQ
This 50 mm bore cylinder features a G1/4 port and delivers 982 N push / 825 N pull at 0.5 MPa, 1374 N push / 1154 N pull at 0.7 MPa, with a theoretical maximum of 200 kgf at 1.0 MPa.
The JSI is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. It supports LB foot, FA/FB flange, CA/CB/CR clevis, and TC trunnion mounts, and the -S magnet allows CMSE/DMSE sensors to be fitted.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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