Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-75
The AirTAC Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-75 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 JSIJ40X125-75
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore JIS profile cylinder brings on-site extend-stroke flexibility to compact automation. Its hard-anodized aluminium barrel omits tie rods entirely, making the body shorter and more streamlined than a same-bore ISO 15552 unit. The G1/4 port feeds the double-acting single-rod piston, driving a 125 mm nominal stroke with 30-800 mm/s speed limits.
The external -75 adjuster lets you shorten the extend stroke down to 50 mm without swapping the cylinder, while the retract end remains fixed. This on-site tuning translates to a safe working load of roughly 377 N, or about 32 kg lifted vertically with a 2:1 margin. Note that this specific SKU lacks a magnet and cannot accept CMSE/DMSE sensors; add an -S variant if you need position detection.
Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-75 Technical Specifications
| Model | Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-75 |
|---|---|
| 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 JSIJ40X125-75
| 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 JSIJ40X125-75 Is Used
Adjustable End-Stop Clamping
Dial in the exact clamping depth on machining fixtures by trimming the extend stroke from 125 mm down to 50 mm on-site without changing the cylinder body.
Variable-Length Reject Gate
Tune the pusher extension length at the line side to accommodate different product widths on a conveyor without needing a full cylinder swap.
Compact Pallet Divertor
Fit a short-stroke diverting mechanism into a tight JIS envelope, using the external adjuster to set the precise sorting stroke for mixed pallet sizes.
Is the Airtac JSIJ32~50 Adjustable Cylinder JSIJ40X125-75 the Right Cylinder?
When sizing this 40 mm bore, step down to a 32 mm bore for lighter 402 N tasks, or step up to a 50 mm bore if you need 982 N of push at 0.5 MPa. The -75 mm adjustable window is ideal for sharing a single spare across multiple stroke variants or fine-tuning the end position during machine commissioning. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because the 125 mm stroke exceeds 300 mm, ensure you use a guide rail to prevent side-load damage to the piston. This non-magnetic SKU cannot host a sensor.
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 JSIJ40X125-75 FAQ
This 40 mm bore cylinder uses a G1/4 port and delivers 628 N push / 528 N pull at 0.5 MPa, and 879 N push / 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
The nominal 125 mm extend stroke is the maximum. The external adjuster lets you shorten the extend stroke by up to 75 mm on-site, giving a usable extend range of 50-125 mm. The retract end is fixed, and this stop only sets the end position—it does not lock the load.
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