Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-40S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X125-40S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 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 JSIJ63X125-40S
An external adjuster lets you shorten the extend stroke on-site by up to 40 mm, giving a usable range of 85-125 mm without changing the unit. The hard-anodized aluminum extruded barrel makes it shorter and more compact than a same-bore ISO 15552 cylinder.
This -S variant includes a built-in piston magnet for CMSE/DMSE switches that drop into the side grooves. Pneumatic connections use a G3/8 port. Remember that the adjustable stop sets the end position but does not lock the load; use an external rod lock or pilot-operated check valve to hold a suspended weight.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-40S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-40S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 JSIJ63X125-40S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×125 | 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 JSIJ63X125-40S Is Used
Press Fit Tuning
Fine-tune the 85-125 mm extend stroke on-site to set precise insertion depth for bearing press fits without swapping cylinders.
Variable Stop Diverter
Adjust the extend end position on the fly to handle different package sizes on a single diverter line using the 40 mm window.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-40S the Right Cylinder?
The JSIJ series mounting options include Basic, FA, LB, TC, TCM1, and TCM2. The -40 mm adjustable window is ideal for sharing a single spare cylinder across multiple stroke variants or fine-tuning the extend end on-site. Because this model includes the -S magnet, it accepts CMSE/DMSE sensors for position feedback. For any stroke at or over 300 mm, always guide the load to prevent side-load damage to the piston rod.
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 JSIJ63X125-40S FAQ
The theoretical maximum force is 318 kgf at 1.0 MPa. The air port size is G3/8.
The nominal stroke is 125 mm. The external adjuster lets you shorten the extend stroke on-site by up to 40 mm, yielding a usable extend range of 85-125 mm. The retract end is fixed. This stop sets the end position and does not hold the load.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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