Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X40-20S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X40-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 40mm 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
- Stroke40 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 JSIJ63X40-20S
The nominal 40 mm stroke is the maximum, yielding a usable extend range of 20 to 40 mm, while the retract end remains fixed. This on-site tuning lets you fine-tune the end position without physically swapping the cylinder. Built with an extruded hard-anodized aluminum barrel, the body is notably shorter and more compact than a same-bore ISO 15552 unit.
The -S suffix indicates a built-in piston magnet for CMSE/DMSE switches that mount directly into the side barrel grooves. Pneumatic connections use a G3/8 port, and the unit features a 20 mm rod, an M18x1.5 rod-end thread, and 29 mm adjustable air cushions at both ends. Note that a plain cylinder does not hold a load on air loss; the cushions only decelerate the piston near the stroke ends. For a held load, you must fit an external rod lock or a pilot-operated check valve.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X40-20S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X40-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 40 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 JSIJ63X40-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×40 | 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 JSIJ63X40-20S Is Used
Short-Stroke Clamping
Dials in the exact clamping contact point on-site by shortening the extend stroke up to 20 mm, accommodating varying part tolerances without changing hardware.
Sensor-Ready Ejection
Uses the built-in magnet and CMSE/DMSE switches to confirm part ejection, while the adjustable stop screw fine-tunes the ejection distance within the 20 to 40 mm window.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X40-20S the Right Cylinder?
The adjustable stroke is ideal when you need to dial in a precise end position on the machine or want to standardize one spare part across several slightly different stroke variants. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2 brackets. The included -S magnet supports CMSE/DMSE sensors for position confirmation. Because this is a short 40 mm stroke, side-load risks are minimal, but for any stroke over 300 mm you should always use a guide rail to prevent rod binding.
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 JSIJ63X40-20S FAQ
The theoretical maximum force is 318 kgf at 1.0 MPa.
An external stop screw lets you shorten the extend stroke on-site by up to 20 mm. The nominal 40 mm stroke is the maximum, so the usable extend range is 20 to 40 mm. The retract end is fixed, and this mechanism sets the end position rather than locking the load.
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