Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X275-20S
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X275-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 275mm 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
- Stroke275 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 JSIJ63X275-20S
You get a usable extend range of 255 to 275 mm, letting you fine-tune the end position without swapping the actuator. The hard-anodized aluminum barrel uses no tie rods, making the body shorter and more compact than a same-bore ISO 15552 cylinder. A built-in magnet (-S) allows CMSE or DMSE sensors to drop directly into the side grooves for position detection.
The G3/8 port and M18x1.5 rod thread match the standard 63 mm architecture, while adjustable air cushions at both ends absorb kinetic energy near the stroke limits. Remember that the cushion only decelerates the piston; a plain cylinder cannot hold a load on air loss, so fit an external rod lock or pilot-operated check valve if you need drift protection.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X275-20S Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X275-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 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 JSIJ63X275-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | 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 JSIJ63X275-20S Is Used
End-Position Trimming
Dial in the exact extend stop on a clamping fixture by turning the external adjuster, shaving up to 20 mm off the 275 mm stroke without changing the cylinder.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X275-20S the Right Cylinder?
The 20 mm adjustable window is ideal when you need to share one spare cylinder across slightly different stroke variants or trim the extend end-position on the machine. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. The -S suffix means the piston magnet is already inside for CMSE/DMSE switches. Because the 275 mm stroke exceeds 300 mm only marginally, side loads are minimal, but for any stroke over 300 mm you should always guide the rod to prevent binding.
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 JSIJ63X275-20S 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. This 63 mm bore cylinder uses a G3/8 air port and an M18x1.5 rod thread.
The 275 mm nominal stroke is the maximum extend length. The external stop screw lets you shorten the extend stroke on site by up to 20 mm, giving a usable range of 255 to 275 mm. The retract end is fixed, and the adjuster sets the end position rather than locking 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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