Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S is a genuine double acting, double rod, adjustable stroke 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, double rod, adjustable stroke
- 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 JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S
An external adjuster lets you shorten the extend stroke by up to 20 mm, giving a usable range of 280-300 mm, while the retract end stays fixed. The hard-anodized aluminium barrel makes it shorter and more compact than a same-bore ISO 15552 unit.
This -S variant carries a built-in piston magnet for CMSE/DMSE sensors that drop directly into the side grooves. Air connects via the G3/8 port, and adjustable 29 mm cushions decelerate the load at both ends. Remember that a plain cylinder drifts on air loss; the cushion only slows the piston near the end of travel, so fit an external rod lock or pilot-operated check valve if you need to hold a load.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| 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 | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 kgf | |
JSIJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative).
Model Code: Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke 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 JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S Is Used
Press Fit Tuning
Use the 20 mm extend window to dial in the exact pressing depth of bearings without changing the cylinder mounting.
Transfer Diverter
Adjust the extend stop on-site to match different box widths on a sorting line, keeping the retract position fixed.
Vertical Lift Stop
Fine-tune the upper lift limit of a 79 kg payload using the external adjuster, avoiding mechanical hard stops.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S the Right Cylinder?
The -20 mm adjustable window is ideal when you need to fine-tune an end position without swapping cylinders, or when you want a shared spare across slightly different stroke variants. JSIJ mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because the stroke is 300 mm, you must support the load with external guides to prevent rod bending and side-load damage. The -S magnet supports CMSE/DMSE switches for position sensing.
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 JSIJ63~80 Adjustable Cylinder JSIJ63X300-20S FAQ
At 0.5 MPa it pushes 1559 N and pulls 1402 N. At 0.7 MPa it pushes 2182 N and pulls 1962 N. The theoretical maximum force is 318 kgf at 1.0 MPa. The air port size is G3/8.
The nominal 300 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke by up to 20 mm on-site, giving a usable extend range of 280-300 mm. The retract end is fixed, and this stop sets position only, not load holding.
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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.
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Most inquiries answered within 7-8 hours.
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