Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S
Generating 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder delivers a 350 mm extend stroke that can be shortened by up to 20 mm on site. A built-in magnet (-S) allows CMSE or DMSE switches to drop directly into the side grooves for precise position detection. The extruded hard-anodized aluminium barrel omits tie rods entirely, making the body noticeably shorter and more compact than a same-bore ISO 15552 cylinder. It breathes through a G1/4 port and features a 20 mm external adjuster window.
The external stop screw lets you fine-tune the extend end position between 330 and 350 mm without swapping the cylinder, while the retract end remains fixed. In practical terms it handles about 589 N of safe working load, roughly 50 kg lifted vertically with a 2:1 margin. Adjustable 20.5 mm air cushions at both ends absorb kinetic energy at stroke extremes, but remember the cushion only decelerates; a plain cylinder cannot hold a load on air loss, so fit an external rod lock or pilot-operated check valve if drift is unacceptable.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 350 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 JSIJ50X350-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×350 | 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 JSIJ50X350-20S Is Used
Transfer Push-Off
Fine-tune the 350 mm extend push-off distance on a conveyor line by up to 20 mm to accommodate varying package widths without changing the cylinder.
Vertical Lift Stop
Lift a 50 kg payload vertically and use the external adjuster to set the exact raise height, relying on the compact JIS profile to save vertical space.
Clamp Positioning
Adjust the extend clamping depth on the fly to account for material thickness variations, using the built-in magnet to confirm the clamp is engaged.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X350-20S the Right Cylinder?
When sizing, the 50 mm bore sits neatly between the 40 mm (628 N push at 0.5 MPa) and the 63 mm (1559 N push at 0.5 MPa) options. This model is ideal when you need on-site end-position tuning across shared spare variants, as the 20 mm adjuster window absorbs mechanical tolerance variations. JSIJ mounting options include Basic, FA, LB, TC, TCM1 and TCM2 brackets. The -S suffix confirms the piston magnet is present for CMSE/DMSE sensors. Because the 350 mm stroke is relatively long, always support the load with an external guide to prevent rod bending and premature seal wear from side loads.
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 JSIJ50X350-20S FAQ
This 50 mm bore cylinder pushes 982 N and pulls 825 N at 0.5 MPa. At 0.7 MPa it pushes 1374 N and pulls 1154 N. The theoretical maximum force is 200 kgf at 1.0 MPa. It uses a G1/4 air port and features a 20 mm M18x1.5 rod thread.
The nominal 350 mm extend stroke is the maximum. An external stop screw lets you shorten the extend stroke on site by up to 20 mm, giving a usable extend range of 330 to 350 mm for fine-tuning the end position. The retract end is fixed, and this stop mechanism is not a load lock.
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