Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-20
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-20 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 JSIJ40X25-20
Generating 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings on-site flexibility to compact assemblies. Its extruded hard-anodized aluminium barrel omits external rods, making the overall body shorter than a same-bore ISO 15552 unit. The G1/4 port feeds the double-acting single-rod piston, delivering reliable thrust within a tight footprint.
The external stop screw provides a 20 mm adjustable window, letting you shorten the extend stroke from the 25 mm maximum down to 5 mm without changing the hardware. This mechanism sets the exact end position and is not a load lock. It handles about 377 N of real work, roughly 32 kg lifted vertically. Note this SKU lacks a magnet, so it cannot take CMSE or DMSE sensors.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-20 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-20 |
|---|---|
| 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 JSIJ40X25-20
| 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 JSIJ40X25-20 Is Used
Probe Positioning
Dial in the exact 5 to 25 mm extension for a test probe contact point without swapping cylinders.
Ejector Pins
Fine-tune the short ejection stroke on a small fixture to accommodate varying part thicknesses.
Light Pressing
Adjust the downward travel on-site to set precise crimping depth for delicate electronic contacts.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X25-20 the Right Cylinder?
When sizing this unit, the 32 mm bore offers a lighter 402 N push at 0.5 MPa, while the 50 mm bore jumps to 982 N if you need more authority. The adjustable stroke shines when you need to fine-tune the extend end position on-site or share a single spare across multiple stroke variants. You can mount it using FA, LB, TC, TCM1, or TCM2 brackets. Because this is a no-magnet model, you cannot fit position sensors; choose an -S variant for CMSE/DMSE switches. For any stroke over 300 mm, always guide the load to prevent side-play from damaging the rod seals.
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 JSIJ40X25-20 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 is 128 kgf at 1.0 MPa. It uses a 16 mm rod, an M14x1.5 rod thread, a G1/4 port, and 20.5 mm adjustable air cushions at both ends.
The nominal stroke is 25 mm, which is the maximum extend travel. An external stop screw lets you shorten that extend stroke by up to 20 mm on-site, giving a usable range of 5 to 25 mm. The retract end remains fixed. This mechanism only sets the end position; it does not hold the load on air loss.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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