Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-20S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-20S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 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 JSIJ125X600-20S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS-profile actuator tackles heavy-duty motion while remaining more compact than a same-bore ISO 15552 cylinder. The hard-anodized extruded aluminum barrel keeps the assembly clean and short. It handles about 3682 N of real work safely, which means lifting roughly 313 kg vertically with a 2:1 margin.
The -20 code means an external adjuster can shorten the 600 mm extend stroke by up to 20 mm on site, giving a usable range of 580-600 mm without changing the cylinder itself. Because this is an -S SKU, a built-in piston magnet lets you drop CMSE or DMSE reed and electronic switches directly into the side grooves. Air connects via the G1/2 port. The retract end remains fixed, and the adjustable air cushions provide 33 mm of deceleration at each end.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-20S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 JSIJ125X600-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×600 | 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 JSIJ125X600-20S Is Used
Heavy Pallet Lift
Raises loaded pallets in a distribution hub, using the 20 mm extend adjuster to dial in the exact upper stop height for different rack levels.
Press Tonnage Stop
Drives a heavy forming press where the external adjuster sets the precise bottom dead center without swapping out the whole actuator.
Bulk Gate Actuation
Opens large bulk-material discharge gates, relying on the 125 mm bore thrust and fine-tuning the 600 mm open position on site.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-20S the Right Cylinder?
At the top of the range, this 125 mm bore pushes 6136 N at 0.5 MPa; if you need less force, stepping down to the 100 mm bore drops output to 3927 N. The on-site extend-shortening window is ideal when you need to fine-tune a machine's end position after installation or want a single shared spare across slight stroke variants. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2. With a 600 mm stroke, you must support the load with external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss because the cushion only decelerates, so specify an external rod lock or pilot-operated check valve if the load must be held.
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 JSIJ125X600-20S 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.
The 600 mm nominal stroke is the maximum. The external adjuster lets you shorten the extend stroke by up to 20 mm on site, yielding a usable range of 580-600 mm. The retract end is fixed, and this stop sets position rather than locking the load.
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Covers non-human-caused product damage.
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