Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X250-20S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X250-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 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 JSIJ63X250-20S
The hard-anodized aluminum extruded body is noticeably shorter than a same-bore ISO 15552 unit, saving valuable machine space. A built-in piston magnet (-S) allows CMSE or DMSE sensors to drop directly into the side grooves for position detection.
The -20 code denotes an external adjuster that shortens the extend stroke on-site by up to 20 mm, giving a usable range of 230 to 250 mm while the retract end remains fixed. Pneumatic connections use a G3/8 port, and the adjustable air cushions decelerate the load smoothly at both ends.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X250-20S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X250-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 JSIJ63X250-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×250 | 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 JSIJ63X250-20S Is Used
Tooling Clamp Depth Setter
Dial in the exact 230 to 250 mm clamping reach on a machining fixture using the external adjuster, accommodating different part heights without changing the cylinder.
Transfer Pusher Tuning
Fine-tune the extend stop to position products accurately on a moving belt, compensating for minor frame offsets directly at the machine.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X250-20S the Right Cylinder?
The 20 mm adjustable window is ideal if you need to dial in a final extend position on-site or want a single spare part covering several stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because this is a 250 mm stroke, ensure adequate external guide rails to prevent side-load wear on the rod seals.
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 JSIJ63X250-20S FAQ
The theoretical maximum force is 318 kgf at 1.0 MPa.
The -20 indicates an external stop screw that lets you shorten the extend stroke by up to 20 mm on-site. The nominal 250 mm stroke is the maximum, giving a usable extend range of 230 to 250 mm, while the retract end remains fixed. This mechanism only sets the end position and does not hold the load on air loss.
Authorized Export Seller
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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