Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 450mm stroke, G1/2 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.
- BoreØ125 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 33 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 JSIJ100~125 Adjustable Cylinder JSIJ125X450-20
Delivering massive thrust with a 125 mm bore, this double-acting single-rod profile cylinder pushes 6136 N and pulls 5734 N at 0.5 MPa. The extruded hard-anodized aluminium barrel keeps the build more compact than a same-bore ISO 15552 unit. It handles about 3682 N of real work safely, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
The external adjuster lets you trim the extend stroke by up to 20 mm on-site, giving a usable range of 430-450 mm without changing the cylinder itself. Air enters via a G1/2 port, driving the 32 mm rod at 30-500 mm/s. Note this SKU lacks a magnet and cannot take a CMSE or DMSE sensor; add the -S variant for position detection.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max standard stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×450 | 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 JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 Is Used
Heavy Pallet Lift
Raises loaded pallets in distribution hubs, using the 20 mm adjuster to dial in the exact raise height and avoid overshoot.
Press Ejection
Pushes heavy stamped parts out of a hydraulic press, relying on 6136 N of thrust and adjustable cushions to absorb impact.
Bulk Container Shift
Indexes large bulk containers along a transfer line, tweaking the extend end-point by 20 mm to match new container sizes.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 the Right Cylinder?
When sizing, the 100 mm bore offers 3927 N push at 0.5 MPa if you need less force, while 125 mm sits at the top edge with 6136 N. The 20 mm adjust window is perfect for sharing one spare across stroke variants or fine-tuning the end position on-site. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because the stroke is 450 mm, always support the load with external guides to prevent rod bending and side-load wear. Remember this plain cylinder cannot hold a load without live air; use an external rod lock or pilot-operated check valve for vertical safety.
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 JSIJ100~125 Adjustable Cylinder JSIJ125X450-20 FAQ
At 0.5 MPa it pushes 6136 N and pulls 5734 N. At 0.7 MPa it pushes 8590 N and pulls 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. This 125 mm bore cylinder uses a G1/2 port.
The nominal 450 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 20 mm, giving a usable range of 430-450 mm. The retract end is fixed, and this stop sets position only; it does not lock the load.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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