Airtac JSI Series Standard Cylinder JSI63X275S
The AirTAC Airtac JSI Series Standard Cylinder JSI63X275S is a genuine double acting JIS-standard air cylinder with a Ø63mm bore and 275mm stroke, G3/8 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.
- BoreØ63 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM18×1.5
- CushionAdjustable, 29 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 JSI63X275S
Delivering 1559 N of push force at 0.5 MPa, this 63 mm bore double-acting actuator fits tighter machine envelopes than a same-size ISO 15552 cylinder. 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. Plan for about 935 N of real work at 0.5 MPa, which safely lifts a 79 kg vertical load with a 2:1 margin.
Because this SKU includes the -S magnet, you can drop CMSE or DMSE reed and electronic switches directly into the side sensor grooves for position detection. Air enters via the G3/8 port, and adjustable air cushions at both ends absorb kinetic energy near stroke end. The M18x1.5 rod thread handles the 275 mm extension smoothly across the 30-800 mm/s speed range.
Airtac JSI Series Standard Cylinder JSI63X275S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI63X275S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 JSI63X275S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | 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 JSI63X275S Is Used
Carton Diverting
Pushes medium-weight cartons across a packaging conveyor using 1559 N of thrust, with the 275 mm stroke clearing the belt width completely.
Pallet Push-Off
Stages 79 kg tote boxes off an accumulation roller bed, where the compact JIS profile saves valuable floor space compared to standard ISO 15552 units.
Clamp Actuation
Secures aluminum extrusions in a machining fixture, relying on the -S magnet and DMSE sensors to confirm the clamp reaches full extension before milling starts.
Is the Airtac JSI Series Standard Cylinder JSI63X275S the Right Cylinder?
When sizing this 63 mm bore class, stepping down to a 50 mm bore lowers the push force to 982 N at 0.5 MPa, while stepping up to an 80 mm bore raises it to 2513 N. This JSI63X275S variant provides a balanced 1559 N output for medium-duty handling. The integrated -S magnet pairs perfectly with CMSE or DMSE switches, so you avoid the sensor blind spots of a non-magnetized unit.
At a 275 mm stroke, support the rod end with an external guide to prevent side-load bending and premature seal wear. Remember that standard air cushions only decelerate the piston near the stroke ends; they do not act as a brake. If your application must hold a vertical load during air loss or valve centering, install an external rod lock or a pilot-operated check valve to stop 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 JSI63X275S FAQ
This 63 mm bore cylinder uses a G3/8 air port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push and 1962 N pull at 0.7 MPa, with a theoretical maximum of 318 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 uses the same LB, FA, FB, CA, CB, and TC mounting styles but saves space, and this -S variant includes a magnet for CMSE/DMSE sensors.
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