Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20 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 JSIJ40X300-20
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings a compact footprint to pneumatic setups. The hard-anodized aluminum barrel makes it shorter than a same-bore ISO 15552 unit. It handles about 377 N of real work, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin.
The -20 code means an external adjuster can shorten the extend stroke on-site by up to 20 mm, giving a usable range of 280-300 mm. The nominal 300 mm stroke is the maximum, and the retract end remains fixed. Air connects via a G1/4 port. Because this is a no-magnet SKU, it cannot take a CMSE or DMSE sensor.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20 |
|---|---|
| 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 JSIJ40X300-20
| 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 JSIJ40X300-20 Is Used
End-Position Tuning
Dial in the exact extend stop within a 280-300 mm window on-site to perfect a clamping distance without changing hardware.
Transfer Push-Off
Pushes parts off a line using 628 N of force at 0.5 MPa, with the 20 mm adjuster absorbing minor positional variations.
Vertical Lift Assist
Lifts roughly 32 kg vertically with a 2:1 safety margin, fitting into tight machine frames thanks to the compact JIS profile.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X300-20 the Right Cylinder?
When sizing, the 32 mm bore offers 402 N push at 0.5 MPa, while the 50 mm bore steps up to 982 N. This 40 mm model fits neatly in the middle. The adjustable stroke is ideal for fine-tuning the extend end position on-site without swapping the cylinder. Mounting options include FA, LB, TC, TCM1, and TCM2. For this 300 mm stroke, use external guides to prevent rod bending and side loads. Note that a plain cylinder drifts on air loss; add an external rod lock for held 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 JSIJ40X300-20 FAQ
At 0.5 MPa it pushes 628 N and pulls 528 N. At 0.7 MPa it pushes 879 N and pulls 739 N. The theoretical maximum force is 128 kgf at 1.0 MPa. It uses a G1/4 port.
An external stop screw lets you shorten the extend stroke by up to 20 mm on-site. The usable extend range is 280-300 mm, with 300 mm being the maximum. The retract end is fixed. This mechanism sets the end position and does not lock the load.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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