Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20LB
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X25-20LB 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 JSIJ63X25-20LB
The hard-anodized aluminum barrel keeps the overall body shorter than a same-bore ISO 15552 unit. Air connects via a G3/8 port.
The -20 code means an external adjuster can shorten the 25 mm extend stroke by up to 20 mm on-site, dropping the usable extend to 5 mm without swapping the cylinder. The retract end remains fixed. Because this SKU lacks the -S magnet, it cannot take a CMSE or DMSE sensor. Note that the adjustable air cushions only decelerate the piston near the ends; to hold a load on air loss you need an external rod lock or pilot-operated check valve.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20LB Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20LB |
|---|---|
| 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 JSIJ63X25-20LB
| 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 JSIJ63X25-20LB Is Used
Short-Stroke Clamping
Dial in the exact 5 to 25 mm clamp extension on-site to grip variable part thicknesses without machining new stops.
Transfer Gate Divert
Adjust the extend stroke on the fly to tune the divert distance for different package widths on a packing line.
Compact Ejector
Fit a high-force 63 mm ejection pusher into a tight machine cell where a longer ISO 15552 cylinder would not clear the frame.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X25-20LB the Right Cylinder?
The adjustable-stroke window is ideal if you need to dial in a precise end position across multiple fixtures or want a shared spare for slight stroke variants. This model includes an LB foot mount for direct base mounting. Since the stroke is only 25 mm, side-load guide concerns are minimal, but for any stroke over 300 mm you should always guide the rod to prevent binding. Remember that without the -S suffix, magnetic sensing is impossible.
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 JSIJ63X25-20LB 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 is G3/8.
The 25 mm nominal stroke is the maximum extend length. The external adjuster lets you shorten that extend stroke by up to 20 mm on-site, giving a usable extend range of 5 to 25 mm. The retract end is fixed, and the adjuster only sets the end position—it does not lock the load.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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