Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-30
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-30 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 JSIJ40X25-30
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings on-site stroke flexibility to tight machinery. The hard-anodized aluminum barrel makes it shorter and more compact than a same-bore ISO 15552 unit. It handles about 377 N of real work safely, which means you can lift roughly 32 kg vertically with a 2:1 margin.
The external adjuster lets you shorten the extend stroke by up to 30 mm on-site, meaning the 25 mm nominal stroke can be fine-tuned down to zero without swapping the cylinder. Air connects via a G1/4 port, and adjustable air cushions of 20.5 mm decelerate the piston at both ends. This plain SKU lacks a magnet, so it cannot take CMSE or DMSE sensors.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-30 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-30 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 JSIJ40X25-30
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×25 | 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 JSIJ40X25-30 Is Used
Short-Stroke Clamping
Adjust the extend stop precisely to clamp delicate workpieces without over-traveling, tuning the 25 mm stroke down to the exact millimeter needed.
Transfer Arm Positioning
Fine-tune the end position of a transfer gate on-site after mounting, allowing perfect alignment with moving conveyor parts.
Compact Sorting Diverter
Fit a short JIS profile body into a tight sorting module and dial in the extend window to deflect parts of varying sizes accurately.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-30 the Right Cylinder?
When sizing, the neighbouring 32 mm bore offers 402 N push at 0.5 MPa, while the 50 mm bore jumps to 982 N if you need more force. This 40 mm bore provides a solid 628 N push and 528 N pull at 0.5 MPa. The adjustable stroke is ideal when you need to fine-tune an end position after installation or want a shared spare across slight stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this is a no-magnet SKU, you cannot fit position sensors; choose the -S variant for CMSE or DMSE switches. For any stroke over 300 mm, always use a guide to prevent rod side-loading.
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 JSIJ40X25-30 FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it provides 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. The air port size is G1/4.
The 25 mm nominal stroke is the maximum extend length. The external adjuster lets you shorten the extend stroke on-site by up to 30 mm, reducing the usable extend stroke down to zero. The retract end remains fixed. Note that this stop only sets the end position; it does not hold the load on air loss, so use an external rod lock for holding.
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Standard models are processed and dispatched in 3-5 business days.
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