Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S
Delivering 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder is built for applications needing exact end-position tuning on site. An external adjuster lets you shorten the extend stroke by up to 20 mm, giving a usable range of 480-500 mm while the retract end stays fixed. The hard-anodized aluminum barrel omits tie rods entirely, making the body shorter and more compact than a same-bore ISO 15552 unit.
Because the -S suffix includes a piston magnet, you can fit CMSE or DMSE reed and electronic switches directly into the side grooves for position sensing. The G1/4 port feeds the double-acting single-rod mechanism, and adjustable air cushions at both ends absorb kinetic energy. In practical terms, this actuator handles about 589 N of safe working load, which means it can lift roughly 50 kg vertically with a 2:1 safety margin. Note that the cushion only decelerates the load; you will need an external rod lock or pilot-operated check valve to hold a suspended load if air pressure drops.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 500 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 JSIJ50X500-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×500 | 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 JSIJ50X500-20S Is Used
Press Stroke Tuning
Dial in the exact 480-500 mm extend position on a light-duty assembly press without swapping mechanical spacers.
Divertor Gate Adjustment
Fine-tune the extend reach of a sorting gate by up to 20 mm to accommodate different package widths on the fly.
Vertical Lift Dampening
Lift 50 kg loads vertically while the adjustable end cushion absorbs kinetic energy near the top of the 500 mm stroke.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X500-20S the Right Cylinder?
When sizing this 50 mm bore, compare it against its neighbors: a 40 mm bore gives 628 N of push at 0.5 MPa, while a 63 mm bore provides 1559 N. This model hits a solid middle ground for medium-duty tasks. The 20 mm adjustable window is highly useful when you want to fine-tune a stopping point without physically remounting the cylinder, or when consolidating spare parts across slightly different stroke variants. You can mount it using FA, LB, TC, TCM1, or TCM2 brackets. Because the stroke is 500 mm, always use an external guide rail to prevent rod bending and side-load damage. The built-in magnet supports CMSE/DMSE sensors for precise switching.
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 JSIJ50X500-20S FAQ
At 0.5 MPa it provides 982 N push and 825 N pull. At 0.7 MPa it provides 1374 N push and 1154 N pull. The theoretical maximum force is 200 kgf at 1.0 MPa. It uses a G1/4 air port and features a 20 mm adjustable air cushion at both ends.
The nominal 500 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 20 mm, yielding a usable extend range of 480-500 mm. The retract end remains fixed. This mechanism sets the end position and does not lock the load.
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