Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X400-20
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X400-20 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 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 JSIJ40X400-20
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder is shorter and more compact than a same-bore ISO 15552 unit. The hard-anodized aluminum barrel keeps the build clean without external tie rods. It handles about 377 N of real work safely, which means roughly 32 kg lifted vertically with a 2:1 margin. The G1/4 port supplies air for speeds of 30-800 mm/s.
The -20 code means an external adjuster can shorten the extend stroke on site by up to 20 mm, giving a usable range of 380-400 mm while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder. This plain SKU lacks a magnet and cannot take a CMSE or DMSE sensor. Note that the air cushion only decelerates the piston; it does not hold the load on air loss, so use an external rod lock for vertical holding.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X400-20 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X400-20 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 JSIJ40X400-20
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×400 | 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 JSIJ40X400-20 Is Used
Transfer Push-Off
Pushes parts off a belt with a 380-400 mm extend stroke, using the adjuster to dial in the exact push distance for different product widths.
Lift Stopper
Acts as an upper travel stop for light vertical lifts under 32 kg, where the 20 mm window fine-tunes the stopping height without changing mounts.
Pallet Diverter
Diverts lightweight pallets on a roller line, shortening the extend stroke on site to accommodate varying pallet depths.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X400-20 the Right Cylinder?
Size this 40 mm bore against the 32 mm edge (402 N push at 0.5 MPa) or the 63 mm class (1559 N). The adjustable 380-400 mm extend window lets you tune the end position on site or standardize one spare across stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. Because the 400 mm stroke is long, always support the load with an external guide to prevent rod bending and side-load wear. You cannot fit a magnetic sensor on this no-S model; choose an -S variant for CMSE or DMSE switches.
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 JSIJ40X400-20 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 and has a 16 mm rod with an M14x1.5 thread.
The nominal 400 mm stroke is the maximum. The external adjuster lets you shorten the extend stroke by up to 20 mm on site, giving a usable range of 380-400 mm. The retract end is fixed. This mechanism sets the end position and does not lock the load.
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