Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-30
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-30 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 JSIJ40X125-30
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings compact power to tight assemblies. Its extruded hard-anodized aluminium barrel omits tie rods entirely, making the body shorter and more compact than a same-bore ISO 15552 unit. The G1/4 port feeds the 16 mm rod, yielding a practical safe working load of about 377 N, which translates to lifting roughly 32 kg vertically with a 2:1 margin.
The -30 code defines an external adjuster that lets you shorten the extend stroke on site by up to 30 mm, giving a usable range of 95 to 125 mm while the retract end stays fixed. You can fine-tune the end position without physically swapping the cylinder. Because this specific SKU lacks the -S magnet option, it cannot accept CMSE or DMSE sensors. Note that the adjustable stop sets position only; for load holding on air loss you must fit an external rod lock or pilot-operated check valve, as the 20.5 mm air cushions only decelerate the piston.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-30 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-30 |
|---|---|
| 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 JSIJ40X125-30
| 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 JSIJ40X125-30 Is Used
Clamp Stroke Trimming
Dial in the exact clamping depth on machining fixtures by shortening the extend stroke up to 30 mm on site without changing the cylinder body.
Transfer Stopper Tuning
Adjust the stopper finger position on the fly to accommodate different product sizes passing down the line, using the full 125 mm or down to 95 mm.
Compact Part Ejection
Fit a powerful 628 N ejection stroke into a tight machine envelope thanks to the short JIS profile barrel that beats ISO 15552 length limits.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-30 the Right Cylinder?
When sizing, the 32 mm bore offers a lighter 402 N push at 0.5 MPa, while the 50 mm bore steps up to 982 N if your payload exceeds the 377 N safe working load of this 40 mm unit. The adjustable stroke is ideal when you need to share one spare across several stroke variants or dial in an exact end position on the machine. Mounting choices include FA, LB, TC, TCM1, and TCM2 brackets. For any stroke at or over 300 mm, always guide the load to prevent side-load damage to the front cover. Remember this plain version has no magnet, so position sensing is impossible without switching to an -S SKU.
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 JSIJ40X125-30 FAQ
At 0.5 MPa it pushes 628 N and pulls 528 N. At 0.7 MPa the push is 879 N and the pull is 739 N. The theoretical maximum force is 128 kgf at 1.0 MPa. It uses a G1/4 port, a 16 mm rod with an M14x1.5 thread, and has 20.5 mm adjustable air cushions at both ends.
The nominal 125 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on site by up to 30 mm, giving a usable extend range of 95 to 125 mm. The retract end remains fixed. This mechanism only sets the end position and does not lock the load.
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