Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 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 JSIJ125X125-75
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty power into a tight footprint. Its extruded hard-anodized aluminium profile barrel is noticeably shorter than a same-bore ISO 15552 cylinder, saving valuable machine space without sacrificing strength. The G1/2 port handles the high air volume needed for dynamic movement.
The external stop screw lets you shorten the extend stroke on-site by up to 75 mm, giving a usable range of 50-125 mm while the retract end stays fixed. You can fine-tune the end position without swapping the cylinder, which handles about 3682 N of real work or roughly 313 kg lifted vertically. Note that this plain SKU lacks a magnet and cannot take a CMSE or DMSE sensor.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 JSIJ125X125-75
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | 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 JSIJ100~125 Adjustable Cylinder JSIJ125X125-75 Is Used
Heavy Pallet Forming
Drives large palletising heads, using the 75 mm window to dial in exact press contact on varied load heights.
Hydraulic Press Clamping
Holds heavy metal workpieces securely, letting operators shorten the extend stroke to avoid over-travel on shorter parts.
Mould Ejection Systems
Pushes dense moulds out of stationary presses, fine-tuning the ejection distance on-site to match different tooling depths.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75 the Right Cylinder?
This 125 mm bore sits at the top of the range, so there is no larger standard size; if you need less force, step down to the 100 mm bore which provides 3927 N push at 0.5 MPa. The 75 mm adjuster is ideal when you need to tune the extend end-point across multiple fixtures or want a shared spare for slightly different stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this is a non-magnet SKU, position sensing is impossible here; you must order the -S variant for CMSE/DMSE switches. For any stroke over 300 mm, always use external guide rails to prevent side-load damage.
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 JSIJ125X125-75 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. Operating speed is 30-500 mm/s. It uses a G1/2 port and an M27x2.0 rod thread.
The nominal 125 mm extend stroke is the maximum. An external stop screw lets you shorten that extend stroke on-site by up to 75 mm, giving a usable extend range of 50-125 mm. The retract end is fixed. This mechanism only sets the end position; it does not lock the load, so use an external rod lock for holding.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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