Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-20
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X125-20 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 JSIJ63X125-20
An external adjuster lets you shorten the extend stroke by up to 20 mm, giving a usable range of 105-125 mm without changing the unit. The hard-anodized aluminium barrel keeps the overall body shorter than a same-bore ISO 15552 cylinder. Air connects via a G3/8 port.
The retract end remains fixed while the stop screw sets the extend endpoint. This stop only sets position; it is not a load lock, so you need an external rod lock or pilot-operated check valve to hold a load against air loss. Because this SKU lacks the -S suffix, it cannot take a magnetic switch. The -S variant is required if you need CMSE or DMSE sensors.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-20 Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-20 |
|---|---|
| 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 JSIJ63X125-20
| 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 JSIJ63X125-20 Is Used
Press Stroke Tuning
Dial in the exact 105-125 mm extend reach on a light assembly press without swapping cylinders, using the external adjuster to accommodate varying material thicknesses.
Variable Length Diverter
Adjust the extend stop on a conveyor sorting arm by up to 20 mm to route different package sizes perfectly into the correct lane.
Adjustable Height Stop
Set a precise physical end-stop for incoming pallets on a gravity roller track, tweaking the 125 mm stroke on-site as pallet dimensions change.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-20 the Right Cylinder?
The adjustable 20 mm window is ideal when you need to fine-tune the extend endpoint on-site or want a single spare part to cover several stroke variants. Mounting choices include FA, LB, TC, TCM1, and TCM2 brackets. Since this is a non-magnet SKU, position sensing is not possible. For any stroke at or above 300 mm, always use a guide rail 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 JSIJ63X125-20 FAQ
This 63 mm bore cylinder pushes 1559 N and pulls 1402 N at 0.5 MPa. At 0.7 MPa it pushes 2182 N and pulls 1962 N. The theoretical maximum force is 318 kgf at 1.0 MPa. It uses a G3/8 port.
The -20 code means an external stop screw shortens the extend stroke by up to 20 mm on-site. The usable extend range is 105-125 mm, with 125 mm being the maximum. The retract end is fixed, and the stop only sets position rather than locking the load.
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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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