Airtac JSI Series Standard Cylinder JSI50X680S
The AirTAC Airtac JSI Series Standard Cylinder JSI50X680S is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 680mm 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
- Stroke680 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 JSI50X680S
Delivering 982 N of push force at 0.5 MPa, the AirTAC JSI50X680S is a double-acting JIS-standard profile cylinder built for compact machinery. Its extruded hard-anodized aluminum barrel lacks external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same 50 mm bore. The heterogeneous two-way piston seal retains grease for long, low-friction life. Because this SKU includes the -S magnet, CMSE or DMSE switches drop directly into the side grooves for position sensing.
With a 680 mm stroke and a G1/4 port, this model suits long-reach tasks while operating between 30-800 mm/s. Plan for about 589 N of real work at 0.5 MPa, which means it lifts about 50 kg vertically with a 2:1 safety margin. The M18x1.5 rod thread and 20.5 mm adjustable air cushions at both ends ensure smooth deceleration.
Airtac JSI Series Standard Cylinder JSI50X680S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X680S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 680 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 JSI50X680S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×680 | 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 JSI50X680S Is Used
Carton Diverting
Pushes packages across a wide 680 mm belt gap using the 982 N push force at 0.5 MPa without requiring a massive footprint.
Pallet Push-Off
Stages goods on a packing line where the 50 kg vertical lift equivalent handles moderate weight shifts smoothly.
Long-Reach Clamping
Secures long workpieces in a machining cell, using the built-in -S magnet to confirm full extension via DMSE sensors.
Is the Airtac JSI Series Standard Cylinder JSI50X680S the Right Cylinder?
When sizing this 50 mm bore, dropping down to a JSI40 gives 628 N push at 0.5 MPa, while stepping up to a JSI63 yields 1559 N. For the 680 mm stroke, add external guide rails to prevent rod bending and premature seal wear under side loads. Note that a standard cylinder drifts if air is lost or the valve is centered; the cushions only decelerate the piston near stroke end. Use an external rod lock or pilot-operated check valve to hold a load safely.
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 JSI50X680S FAQ
This 50 mm bore cylinder pushes 982 N and pulls 825 N at 0.5 MPa, pushes 1374 N and pulls 1154 N at 0.7 MPa, and has a theoretical max of 200 kgf at 1.0 MPa. The air port is G1/4.
The JSI series uses an extruded hard-anodized aluminum barrel without external rods, making it shorter and more compact than an ISO 15552 cylinder of the same bore while retaining dual-side sensor grooves.
Authorized Export Seller
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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