Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-40
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-40 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 JSIJ40X125-40
Generating 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings on-site extend-stroke flexibility to mid-range pneumatics. The hard-anodized aluminum barrel keeps the total length shorter than a same-bore ISO 15552 unit. It handles about 377 N of safe working load, which means you can lift roughly 32 kg vertically with a 2:1 safety margin.
The -40 code means an external adjuster can shorten the extend stroke by up to 40 mm on site, giving a usable range of 85-125 mm while the retract end remains fixed. This lets you fine-tune the end position without swapping the cylinder. The G1/4 port feeds the 20.5 mm adjustable air cushions at both ends. Note this SKU lacks a magnet and cannot take a CMSE/DMSE sensor; the -S variant is required for position detection.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-40 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-40 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 JSIJ40X125-40
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×125 | 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 JSIJ40X125-40 Is Used
Clamp Stroke Tuning
Dial in the exact 85-125 mm extend position on a machining fixture without machining custom spacers or changing the cylinder body.
Transfer Diverter
Adjust the extend stop on a conveyor sorting gate to accommodate different package sizes on the fly, ensuring positive contact without overtravel.
Press Fit Depth
Set the precise lower end position for a light-duty 32 kg vertical press operation, fine-tuning the 40 mm window to suit varying part heights.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-40 the Right Cylinder?
When sizing, the 32 mm bore offers 402 N push at 0.5 MPa for lighter duties, while the 50 mm bore steps up to 982 N if this 40 mm model is too light. The adjustable stroke is ideal for tuning end positions on site or sharing one spare across multiple stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because this is a 125 mm stroke, mount a guide to absorb side loads and prevent rod binding. Remember that air cushions only decelerate the piston; use an external rod lock or pilot-operated check valve if you need to hold a load vertically on air loss.
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 JSIJ40X125-40 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. This 40 mm bore model uses a G1/4 air port.
The nominal stroke is 125 mm, which is the maximum extend length. The external adjuster lets you shorten the extend stroke on site by up to 40 mm, giving a usable range of 85-125 mm. The retract end is fixed, and this stop only sets the end position rather than locking the load.
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Standard models are processed and dispatched in 3-5 business days.
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