Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30S 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 JSIJ125X450-30S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a tight footprint. The extruded hard-anodized aluminium profile barrel leaves out external rods entirely, making the body shorter and more compact than a same-bore ISO 15552 cylinder. Air enters via a G1/2 port, driving a 32 mm rod with M27x2.0 threading.
The external adjuster lets you trim the extend stroke on-site by up to 30 mm, giving a usable forward travel of 420-450 mm without swapping the cylinder. This on-site tuning is ideal for dialing in exact end positions across shared spares. With a 6136 N baseline, it comfortably handles about 3682 N of real work, lifting roughly 313 kg vertically with a 2:1 safety margin. The built-in magnet supports CMSE/DMSE sensors in the side grooves.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30S |
|---|---|
| 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 JSIJ125X450-30S
| 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 JSIJ125X450-30S Is Used
Heavy Pallet Forming
Drives large platens to compress pallets, using the 30 mm extend window to fine-tune the final pressing position on-site without changing the actuator.
Stamping Press Feed
Moves heavy blanks into a press, relying on the 6136 N push force at 0.5 MPa and the compact JIS profile to save valuable machine floor space.
Bulk Material Diverting
Actuates a heavy diverter gate on a high-capacity conveyor, adjusting the 450 mm extend stroke by up to 30 mm to match different package sizes.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X450-30S the Right Cylinder?
When sizing, the neighbouring 100 mm bore yields 3927 N push at 0.5 MPa, while this 125 mm unit reaches 6136 N, making it the right pick when you need serious thrust. The -30 mm adjust window is a major advantage for machines that need fine end-position tuning after installation or shared spares across slightly different stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. Because the 450 mm stroke is long, always support the load with external guides to prevent rod bending and side-load wear. The -S suffix means the piston magnet is present for CMSE/DMSE switches.
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 JSIJ125X450-30S FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa it provides 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
The -30 code means an external stop screw lets you shorten the extend stroke by up to 30 mm on-site, giving a usable range of 420-450 mm from the 450 mm nominal maximum. The retract end is fixed. This stop only sets the end position; it is not a load lock. The cylinder will drift on air loss, so use an external rod lock or pilot-operated check valve for held loads.
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