Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø50mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 20.5 mm
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S
Generating 982 N of push force at 0.5 MPa, this 50 mm bore JIS profile cylinder is built for tight machinery where every millimeter counts. Its extruded hard-anodized aluminum barrel makes it noticeably shorter than a same-bore ISO 15552 unit. The G1/4 port feeds a double-acting single-rod system that safely handles about 589 N of real work, which is roughly 50 kg lifted vertically with a 2:1 margin.
The -20 code means an external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable forward range of 55-75 mm without swapping the cylinder. Because this is the -S variant, a built-in piston magnet works directly with CMSE/DMSE sensors in the side grooves. The retract end remains fixed, and while the adjustable cushions decelerate the piston, you will need an external rod lock or pilot-operated check valve to hold a suspended load securely.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 75 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 JSIJ50X75-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×75 | 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 JSIJ50X75-20S Is Used
Tooling Positioner
Dial in the exact clamping reach on a machining fixture by trimming the extend stroke 55-75 mm on-site to accommodate different part heights.
Transfer Diverter
Adjust the pusher extension length precisely without changing the cylinder mount, ensuring packages of varying widths divert correctly onto secondary lines.
Sorting Gate
Fine-tune the gate stroke on a compact sorting station where the shorter JIS profile saves valuable floor space compared to standard ISO 15552 units.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ50X75-20S the Right Cylinder?
When sizing, the neighboring 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore steps up to 1559 N, so this 50 mm bore sits right in the middle for medium-duty work. The adjustable stroke is highly useful when you want to fine-tune an end position on-site or keep one shared spare across multiple stroke variants. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. The -S magnet supports CMSE/DMSE switches for position confirmation. For any stroke length at or above 300 mm, always guide the load to prevent side-load damage to 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 JSIJ50X75-20S FAQ
This 50 mm bore cylinder features a G1/4 air port and a 20 mm piston rod. It generates 982 N push and 825 N pull at 0.5 MPa, 1374 N push and 1154 N pull at 0.7 MPa, with a theoretical maximum of 200 kgf at 1.0 MPa.
The nominal extend stroke is 75 mm. The -20 code indicates an external adjuster that lets you shorten the forward stroke by up to 20 mm on-site, yielding a usable range of 55-75 mm. The retract end is fixed, and this mechanism sets the end position rather than locking the load.
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