Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 300mm 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.
- BoreØ40 mm
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- CushionAdjustable, 20.5 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder features an external adjuster that lets you shorten the extend stroke on-site by up to 20 mm. The nominal 300 mm stroke remains the maximum travel, giving you a usable extend window of 280 to 300 mm for fine-tuning the end position without swapping the actuator. It handles about 377 N of real work safely, which translates to roughly 32 kg lifted vertically with a 2:1 margin.
Built with an extruded hard-anodized aluminum barrel and a G1/4 port, this double-acting single-rod unit is notably shorter and more compact than a same-bore ISO 15552 cylinder. The -S suffix means a built-in piston magnet is present, allowing CMSE or DMSE switches to drop directly into the side grooves for position sensing. Note that the integrated air cushion only decelerates the piston near the end of travel; it does not hold the load on air loss, so fit an external rod lock or pilot-operated check valve if you need to prevent drift.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 JSIJ40X300-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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 JSIJ40X300-20S Is Used
Conveyor Diverter Tuning
Fine-tune the 300 mm extend stroke by up to 20 mm on-site to perfectly align a diverter gate without changing the cylinder mount.
Packaging Pusher Adjustment
Adapt the extend end position for varying carton sizes using the external adjuster while relying on the 628 N push force.
Vertical Lift Stops
Safely lift roughly 32 kg vertically with a 2:1 margin, setting the exact extend stop for tiered shelving placement.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20S the Right Cylinder?
When sizing this 40 mm bore actuator, the neighbouring 32 mm bore offers 402 N push at 0.5 MPa for lighter duties, while stepping up to the 50 mm bore yields 982 N for heavier cycles. The adjustable stroke is particularly useful when you need to share a spare cylinder across slightly different stroke variants or fine-tune the extend end position on-site. JSIJ mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because the 300 mm stroke is relatively long, always use external guides to prevent rod bending and manage side loads. The -S magnet supports CMSE/DMSE sensors for precise positioning.
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 JSIJ40X300-20S FAQ
This 40 mm bore cylinder uses a G1/4 air port. It generates 628 N push and 528 N pull at 0.5 MPa, increasing to 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
The external stop screw lets you shorten the extend stroke by up to 20 mm on-site, providing a usable extend range of 280 to 300 mm. The nominal 300 mm stroke is the maximum travel, and the retract end remains fixed. This mechanism sets the end position and does not lock the load.
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