Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 80mm stroke, G1/4 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.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S
Generating 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder builds into a notably shorter assembly than a same-bore ISO 15552 unit. The hard-anodized aluminium extrusion omits tie rods entirely, keeping the envelope clean while housing an integrated piston magnet for CMSE/DMSE position switches.
A 20 mm external stop screw lets you trim the extend stroke down to 60 mm on-site without swapping the cylinder, leaving the retract end fixed. It handles about 589 N of real work safely, which translates to roughly 50 kg lifted vertically with a 2:1 margin. The G1/4 ports and 20.5 mm adjustable air cushions manage the kinetic energy smoothly.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| 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, 20.5 mm |
| Max standard stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×80 | 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 JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S Is Used
Clamp Position Trimming
Dial in the exact clamping depth on machining fixtures by turning the 20 mm adjuster, ensuring parts seat correctly without re-engineering the pneumatic setup.
Transfer Gate Timing
Synchronize diverter gates on a packaging line by shortening the extend stroke on-site, matching varying product widths without replacing the actuator.
Vertical Lift Stops
Lift 50 kg loads vertically using the 0.5 MPa thrust, tweaking the upper stop position precisely to avoid over-travel into mezzanine structures.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S the Right Cylinder?
This 50 mm bore sits comfortably in the mid-range, stepping up from the 40 mm class (628 N push at 0.5 MPa) and down from the 63 mm class (1559 N). The 20 mm adjuster is ideal when you need to fine-tune the extend end position across multiple stations or standardize one spare for slightly different stroke needs. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. Because it carries the -S suffix, it accepts CMSE/DMSE sensors directly in the side groove. For any stroke over 300 mm, always guide the load 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 JSIJ32~50 Adjustable Cylinder JSIJ50X80-20S FAQ
At 0.5 MPa it pushes 982 N and pulls 825 N; at 0.7 MPa it pushes 1374 N and pulls 1154 N. The theoretical maximum is 200 kgf at 1.0 MPa. It uses a G1/4 port, an M18x1.5 rod thread, and adjustable 20.5 mm cushions at both ends.
The 80 mm nominal stroke is the maximum length. The external adjuster lets you shorten the extend stroke by up to 20 mm on-site, giving a usable extend range of 60 to 80 mm. The retract end remains fixed, and this mechanism only sets the end position—it does not lock the load.
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