Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-100S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X125-100S 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 JSIJ63X125-100S
The external adjuster allows you to shorten the forward stroke by up to 100 mm, giving a usable range of 25-125 mm without swapping the cylinder. The retract end remains fixed. Because the nominal 125 mm stroke is the maximum, you can fine-tune the end position perfectly during machine commissioning.
Built to JIS standards with an extruded hard-anodized aluminium profile barrel, the body is noticeably shorter and more compact than a same-bore ISO 15552 cylinder. It uses a G3/8 port, an M18x1.5 rod thread, and 29 mm adjustable air cushions at both ends. The -S suffix indicates a built-in piston magnet for CMSE/DMSE switches that mount directly into the side grooves. Note that a plain cylinder does not hold load on air loss; the cushions only decelerate, so fit an external rod lock or pilot-operated check valve for suspended loads.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-100S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-100S |
|---|---|
| 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 JSIJ63X125-100S
| 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 JSIJ63X125-100S Is Used
Variable Stroke Clamping
Dial in the exact clamping distance on parts of varying widths by adjusting the extend stroke from 25 to 125 mm on the fly.
Adjustable Transfer Stop
Act as a raised stop on a conveyor line where the required product push-back distance needs frequent on-site tuning without changing actuators.
Tiered Pallet Positioning
Extend to different nominal lengths to push pallets into multiple staging zones, using the external adjuster to set the exact resting position.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-100S the Right Cylinder?
The 63 mm bore hits a strong middle ground. The adjustable stroke is invaluable when you need to share one spare across multiple stroke variants or dial in a precise end position on-site. JSIJ mounting options include Basic, FA, LB, TC, TCM1, and TCM2. The -S magnet supports CMSE/DMSE sensors for position feedback. For any stroke length of 300 mm or more, always use a guide rail to prevent rod side-load damage.
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 JSIJ63X125-100S FAQ
The theoretical maximum force is 318 kgf at 1.0 MPa. This 63 mm bore cylinder uses a G3/8 port and has a 29 mm adjustable cushion at each end.
The external adjuster lets you shorten the extend stroke on-site by up to 100 mm. With a nominal stroke of 125 mm, the usable extend range is 25-125 mm. The retract end is fixed, and the stop sets the end position rather than acting as a load lock.
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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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