Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20
Delivering 982 N of push force at 0.5 MPa, this 50 mm bore pneumatic actuator brings precise on-site end-position tuning to compact assembly machinery. An external stop screw lets technicians shorten the extend stroke by up to 20 mm, meaning the usable extension range is 30-50 mm while the retract end remains fixed. This on-site adjustability lets you fine-tune the stroke without swapping the cylinder, and the hard-anodized aluminum profile barrel keeps the overall build shorter than a same-bore ISO 15552 unit.
In practical terms, the unit handles a safe working load of roughly 589 N, which translates to lifting about 50 kg vertically with a 2:1 safety margin. The G1/4 port feeds the double-acting single-rod system, and adjustable air cushions of 20.5 mm at each end absorb kinetic energy near stroke end. Note that this plain SKU lacks a magnet and cannot take a CMSE or DMSE sensor; for position feedback you need the -S variant.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 JSIJ50X50-20
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×50 | 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 JSIJ50X50-20 Is Used
Press Fit Tuning
Shortens the extend stroke by up to 20 mm on-site to set exact pressing depth for small bearing inserts without machining new stopper blocks.
Divertor Gate Adjustment
Fine-tunes the extend position of a sorting flap by 30-50 mm to accommodate different package widths on a shared production line.
Compact Ejector Station
Uses the shorter JIS profile to fit a tight ejection mechanism, retracting parts quickly while the external adjuster dials in the exact kick distance.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X50-20 the Right Cylinder?
When sizing this actuator, the 50 mm bore sits comfortably in the mid-range, offering significantly more thrust than a 40 mm bore (628 N push at 0.5 MPa) but less than the 63 mm class (1559 N). The adjustable stroke feature is ideal for machines that share a common spare across slightly different stroke variants, as the 20 mm window allows on-site end-position tuning to compensate for mechanical drift. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because this is a plain non-magnetized model, it cannot support magnetic sensing. For any application involving a stroke of 300 mm or more, always use an external guide rail to prevent excessive side-loading on the piston rod.
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 JSIJ50X50-20 FAQ
At 0.5 MPa it provides 982 N push and 825 N pull. At 0.7 MPa the forces are 1374 N push and 1154 N pull. The theoretical maximum force is 200 kgf at 1.0 MPa. This 50 mm bore unit uses a G1/4 air port and features a 20 mm piston rod with an M18x1.5 rod-end thread.
The nominal stroke is 50 mm, which is the maximum extension. An external stop screw allows you to shorten the extend stroke on-site by up to 20 mm, giving a usable extend range of 30-50 mm. The retract end is fixed. This mechanism only sets the end position and does not lock the load; for load holding on air loss, you must use an external rod lock or pilot-operated check valve.
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