Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20
Delivering 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder keeps your envelope tight. Its extruded hard-anodized aluminium barrel is noticeably shorter than a same-bore ISO 15552 unit, saving machine footprint without losing power. The G1/4 port drives a 30-800 mm/s speed range.
The external adjuster lets you shorten the 400 mm extend stroke by up to 20 mm on-site, giving a usable 380-400 mm range for fine end-position tuning. It handles about 589 N of real work safely, roughly 50 kg lifted vertically with a 2:1 margin. This base SKU lacks a magnet and cannot take a CMSE/DMSE sensor. The air cushion only decelerates the piston; use an external rod lock for held loads.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 JSIJ50X400-20
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×400 | 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 JSIJ50X400-20 Is Used
Press Fit Tuning
Dial in the exact 380-400 mm extend position on-site via the 20 mm adjuster to seat bearings without bottoming out the assembly.
Transfer Stopper
Acts as a height-specific gate for varied product sizes, using the external stop screw to tweak the extend endpoint on the fly.
Vertical Lift Limit
Lifts roughly 50 kg vertically with a 2:1 safety margin, while the adjuster sets the precise raise height to prevent collisions.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X400-20 the Right Cylinder?
For sizing, the adjacent 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore jumps to 1559 N. Choose this 50 mm option when your load sits near 589 N. The -20 mm adjustable window is ideal for sharing a spare across stroke variants or finalizing end positions without swapping the cylinder. Mounting options include FA, LB, TC, TCM1, and TCM2. Because the 400 mm stroke invites rod bending, always use an external guide to absorb side loads. You must select the -S variant if you need CMSE/DMSE magnetic sensing.
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 JSIJ50X400-20 FAQ
At 0.5 MPa it provides 982 N push and 825 N pull. At 0.7 MPa it yields 1374 N push and 1154 N pull. The theoretical maximum is 200 kgf at 1.0 MPa. This 50 mm bore uses a G1/4 air port and features a 20 mm adjustable air cushion at each end.
The nominal 400 mm stroke is the maximum. The external adjuster lets you shorten the extend stroke by up to 20 mm on-site, providing a usable range of 380-400 mm. The retract end remains fixed. This mechanism sets the end position and does not lock the load.
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