Airtac JSI Series Standard Cylinder JSI63X300S
The AirTAC Airtac JSI Series Standard Cylinder JSI63X300S is a genuine double acting JIS-standard air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 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 JSI63X300S
Delivering 1559 N of push force at 0.5 MPa, this double-acting 63 mm bore JIS-standard profile cylinder is purpose-built for tight machinery envelopes. It is notably shorter and more compact than an equivalent ISO 15552 cylinder of the same bore, saving valuable real estate without sacrificing power. 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 roughly 935 N of real work at 0.5 MPa, which translates to lifting about 79 kg vertically with a 2:1 safety 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 precise position detection. The unit features a 20 mm carbon steel rod with a hard chrome plating, an M18x1.5 rod-end thread, and a G3/8 air port. Adjustable air cushions at both ends provide 29 mm of deceleration to absorb kinetic energy at stroke ends. For tasks requiring opposing movements from a single unit, consider the JSID double-rod variant, or the JSIJ for adjustable stroke requirements.
Airtac JSI Series Standard Cylinder JSI63X300S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI63X300S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 JSI63X300S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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 JSI63X300S Is Used
Pallet Diversion Gate
Pushes 60 kg loaded pallets onto a secondary packaging line using the 1559 N push force, relying on the 300 mm stroke to clear the main conveyor path completely.
Component Press Fixture
Drives a 300 mm downward stroke to seat bearings into housings, utilizing the adjustable 29 mm cushioning to prevent impact damage at the bottom of the press cycle.
Vertical Lift Gate
Raises a 75 kg access door on a packaging machine, staying within the 79 kg safe vertical lift limit while the -S magnet tracks the full open and closed positions via DMSE sensors.
Is the Airtac JSI Series Standard Cylinder JSI63X300S the Right Cylinder?
When sizing this 63 mm bore actuator, verify your actual load requirements against its 1559 N push and 1402 N pull capabilities at 0.5 MPa. If your application demands less force, stepping down to the 50 mm bore yields 982 N of push force. Conversely, heavier payloads up to 2513 N push necessitate moving to the 80 mm bore. This model includes the -S piston magnet, making it fully compatible with CMSE and DMSE sensors for closed-loop positioning. For applications needing a different stroke format, the JSIJ allows for adjustable stroke lengths.
At a 300 mm stroke, the 20 mm rod is susceptible to bending under lateral stress, so external guide rails must support the payload to prevent side-loading damage. Furthermore, standard air cushions only decelerate the piston near the end of travel and do not act as a brake. If the air supply drops or the valve is centered, the piston will drift; to maintain a vertical load safely, install an external rod lock or a pilot-operated check valve.
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 JSI63X300S FAQ
This 63 mm bore cylinder features a G3/8 air port and an M18x1.5 rod thread. The force output is 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 an extruded hard-anodized aluminum barrel without external rods to achieve this space saving, making it ideal for tight machine layouts.
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Standard models are processed and dispatched in 3-5 business days.
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