Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-10
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-10 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 JSIJ40X125-10
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder features a hard-anodized aluminum barrel that is noticeably shorter than a same-bore ISO 15552 unit. It uses a G1/4 port and a 16 mm rod with an M14x1.5 thread. The external adjuster allows you to shorten the extend stroke on site by up to 10 mm, yielding a usable forward travel of 115 to 125 mm while the retract end remains fixed.
This on-site tuning lets you fine-tune the end position without physically swapping the cylinder, making it ideal for shared spares across slightly different stroke variants. In practical terms it handles about 377 N of real work safely, translating to roughly 32 kg lifted vertically with a 2:1 margin. Note that this specific SKU lacks a magnet and cannot take a CMSE or DMSE sensor. Furthermore, the adjustable cushion only decelerates the piston near stroke end; it does not hold the load on air loss, so use an external rod lock or pilot-operated check valve for suspended loads.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-10 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-10 |
|---|---|
| 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 JSIJ40X125-10
| 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 JSIJ40X125-10 Is Used
Dial-In Clamping
Shortens the extend stroke by up to 10 mm to clamp varying part widths precisely without changing the fixture hardware.
Transfer Stopper
Adjusts the forward stop position on-site to accommodate different product lengths moving down a packaging line.
Shared Spare Unit
Keeps one cylinder in stock for multiple 125 mm stroke machines, fine-tuning the end position via the external screw.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-10 the Right Cylinder?
When sizing, the neighboring 32 mm bore provides 402 N push at 0.5 MPa for lighter duties, while the 50 mm bore steps up to 982 N if this 40 mm unit is undersized. The 10 mm adjustable window is highly useful for dialing in exact end positions on-site or keeping one spare for multiple 125 mm variants. JSIJ mounting options include FA, LB, TC, TCM1, and TCM2. Because this SKU has no -S suffix, it cannot accept a magnetic switch; order the -S version for CMSE/DMSE sensors. For any stroke at or above 300 mm, always guide the load to prevent side-load damage to 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 JSIJ40X125-10 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.
The -10 means the extend stroke can be shortened on-site by up to 10 mm via an external stop screw. The usable forward travel is 115 to 125 mm, with 125 mm being the maximum. The retract end is fixed.
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