Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-75
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X125-75 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 JSIJ63X125-75
The extruded hard-anodized aluminium barrel makes it shorter than an equivalent ISO 15552 cylinder, saving valuable machine space without losing power. A G3/8 port supplies air to the double-acting double rod, while adjustable air cushions of 29 mm at each end absorb end-of-stroke impact.
The -75 code means an external adjuster can shorten the extend stroke on-site by up to 75 mm, giving a usable range of 50 to 125 mm. You can fine-tune the end position without swapping the cylinder, which is ideal for shared spares across stroke variants. Note that this plain SKU lacks a magnet and cannot take a CMSE or DMSE sensor; the retract end remains fixed.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-75 Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-75 |
|---|---|
| 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 JSIJ63X125-75
| 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 JSIJ63X125-75 Is Used
Variable Stroke Clamping
Dial in the exact 50 to 125 mm clamp reach on-site to accommodate different part heights without changing the cylinder.
Adjustable Transfer Stop
Use the external adjuster to set a precise stop position for varying product lengths on a packaging line.
Shared Spare Cylinder
Keep one cylinder as a universal spare, shortening the extend stroke as needed to fit multiple machine configurations.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-75 the Right Cylinder?
The adjustable stroke is perfect for on-site end-position tuning, letting one spare cover several stroke variants. JSIJ mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because this SKU lacks the -S suffix, it cannot accept magnetic sensors. For any stroke over 300 mm, always use a guide rail to prevent side-load damage. Remember that the air cushion only decelerates; for a held load, fit an external rod lock or pilot-operated check valve.
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 JSIJ63X125-75 FAQ
This 63 mm bore cylinder uses a G3/8 port and a 20 mm rod. The theoretical maximum force is 318 kgf at 1.0 MPa.
The nominal 125 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 75 mm, giving a usable extend range of 50 to 125 mm. The retract end is fixed, and this stop sets position only; it does not lock 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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Most inquiries answered within 7-8 hours.
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