Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30 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 JSIJ125X450-30
Delivering massive thrust for heavy automation, this 125 mm bore JIS actuator pushes with 6136 N and pulls with 5734 N at 0.5 MPa. Built as an extruded hard-anodized aluminium profile barrel, it is significantly shorter and more compact than a same-bore ISO 15552 cylinder. It handles a safe working load of about 3682 N, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
The external stop screw provides a 30 mm adjustment window, letting you fine-tune the extend end position from 420 to 450 mm on-site without swapping the cylinder. Retract remains fixed. This double-acting unit uses a G1/2 port, an M27x2.0 rod thread, and 33 mm adjustable air cushions at both ends. Note that this non-magnetic SKU cannot take a CMSE or DMSE sensor; for position feedback you need the -S variant.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30 |
|---|---|
| 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 JSIJ125X450-30
| 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 JSIJ125X450-30 Is Used
Heavy Pallet Forming
Drives a large platen to compress layered goods, using the 30 mm extend adjuster to set exact final height for strapping without reprogramming the machine.
Press Die Tuning
Provides 6136 N of clamping force at 0.5 MPa for heavy press operations, allowing operators to dial in the exact 420 to 450 mm closure distance on-site.
Bulk Lift Gate
Lifts roughly 313 kg of bulk material vertically using a 2:1 safety margin, relying on an external check valve to hold the load securely when air drops.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30 the Right Cylinder?
When sizing this actuator, the 125 mm bore sits at the top edge of the JSIJ range, offering a theoretical maximum of 1251 kgf at 1.0 MPa. If your task needs less force, stepping down to the 80 mm bore drops the 0.5 MPa push to 2513 N. The 30 mm on-site adjuster is ideal for sharing a spare across stroke variants or dialing in final end positions during commissioning. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. Because the stroke is 450 mm, always use an external guide rail to prevent rod bending and manage side loads. Without live air, the cylinder will not hold a load, so add 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 JSIJ125X450-30 FAQ
At 0.5 MPa it pushes with 6136 N and pulls with 5734 N. At 0.7 MPa the push is 8590 N and pull is 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It features a 32 mm rod, an M27x2.0 rod thread, a G1/2 port, and 33 mm adjustable cushions.
The nominal 450 mm stroke is the maximum extend length. An external stop screw lets you shorten the extend stroke by up to 30 mm on-site, giving a usable range of 420 to 450 mm for fine-tuning the end position. The retract end is fixed, and this stop is not a load lock.
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