Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X25-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 25mm 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
- Stroke25 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 JSIJ63X25-20S
Its extruded hard-anodized aluminium barrel omits external rods, making the body noticeably shorter and more compact than a same-bore ISO 15552 cylinder. The integrated G3/8 port keeps airflow generous for the 30-800 mm/s speed range.
The -20 code means an external adjuster can shorten the extend stroke on-site by up to 20 mm, giving a usable 5-25 mm range while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder, and the built-in magnet (-S) accepts CMSE/DMSE sensors in the side grooves.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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 JSIJ63X25-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | 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 JSIJ63X25-20S Is Used
Short-Stroke Clamping
Dial in the exact 5-25 mm clamp extension on-site to grip varying part thicknesses without re-engineering the fixture.
Transfer Diverters
Fine-tune the diverting finger position on a packaging line to handle different carton widths using the external stop screw.
Sensor Equipped Pushing
Use the built-in magnet with CMSE/DMSE switches to confirm part placement, adjusting the push depth for delicate components.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20S the Right Cylinder?
The adjustable-stroke window is ideal when you need to dial in a precise 5-25 mm extend end-position on-site, or when you want one shared spare across several stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. The -S suffix confirms the piston magnet is present for CMSE/DMSE switches. Because the stroke is short, side-load risks are minimal, but for any application exceeding 300 mm you should guide the rod to prevent 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 JSIJ63X25-20S FAQ
The theoretical maximum force is 318 kgf at 1.0 MPa. The air port size is G3/8.
The nominal 25 mm stroke is the maximum. The external adjuster lets you shorten the extend stroke on-site by up to 20 mm, yielding a usable extend range of 5-25 mm. The retract end is fixed. This stop sets the end position but does not lock the load; for load holding on air loss you need an external rod lock or pilot-operated check valve.
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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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