
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X175-50S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 175mm 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.
Its hard-anodized extruded aluminum barrel makes it shorter and more compact than a same-bore ISO 15552 unit.
The -50S code brings an external adjuster that shortens the extend stroke on-site by up to 50 mm, yielding a usable 125-175 mm range while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder, which is ideal for sharing spares across stroke variants. The built-in magnet (-S) accepts CMSE/DMSE sensors in the side grooves.
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X175-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 175 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).
| 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).
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×175 | 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.
Dial in the exact 125 to 175 mm extend position on-site to clamp varying part widths without machining new hard stops.
Shorten the extend stroke by up to 50 mm to accommodate different product lengths on a packaging line without changing the cylinder.
Keep one -50S unit as a universal replacement, adjusting the external stop screw to match the exact stroke of neighboring machines.
The adjustable stroke shines when you need on-site end-position tuning or want one shared spare across multiple stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. The -S magnet enables CMSE/DMSE position sensing. Because the 175 mm stroke exceeds 300 mm only in longer models, remember to guide the load here to prevent rod side-load wear.
Quick checklist
The theoretical maximum force is 318 kgf at 1.0 MPa. It uses a G3/8 air port.
The -50 code means an external stop screw lets you shorten the extend stroke on-site by up to 50 mm. The nominal 175 mm stroke is the maximum, giving a usable extend range of 125-175 mm, while the retract end remains fixed. The stop sets the end position and is not a load lock.
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