Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-50
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-50 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 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 JSIJ125X50-50
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a compact profile barrel that is notably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminium extrusion keeps the assembly light while handling up to 1251 kgf at 1.0 MPa. It connects via a G1/2 port and runs at 30-500 mm/s.
The external -50 adjuster lets you shorten the extend stroke on-site from the 50 mm maximum down to zero, perfect for dialing in the exact end position without swapping the cylinder. In practice it handles about 3682 N of real work safely, lifting roughly 313 kg vertically with a 2:1 margin. Note this non-magnet SKU cannot take a sensor; the -S variant is needed for CMSE/DMSE switches.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-50 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-50 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 JSIJ125X50-50
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×50 | 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 JSIJ125X50-50 Is Used
Heavy Pallet Lift
Raises loaded pallets with a safe working load near 3682 N, using the adjustable extend stop to set the exact lift height without repositioning the cylinder.
Press End-Position Tuning
Provides 8590 N of thrust at 0.7 MPa for seating heavy components, letting operators dial the extend stroke from 50 mm down to zero on-site for precise contact.
Compact Stacking Gate
Fits into tight machinery frames thanks to the JIS profile barrel being shorter than an ISO 15552 unit, while delivering the massive force needed to shift heavy stock.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-50 the Right Cylinder?
This 125 mm bore sits at the top of the range; if 6136 N push at 0.5 MPa is excessive, step down to the 100 mm bore (3927 N push). The adjustable -50 window is ideal when you need to share one spare across slight stroke variants or fine-tune the extend endpoint on the machine. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this plain SKU lacks a magnet, position sensing is impossible without the -S version. For any stroke over 300 mm, always guide the load to prevent side-load wear on the rod seal.
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 JSIJ125X50-50 FAQ
It pushes 6136 N and pulls 5734 N at 0.5 MPa, pushes 8590 N and pulls 8028 N at 0.7 MPa, and reaches a theoretical maximum of 1251 kgf at 1.0 MPa. The air port is G1/2.
The nominal 50 mm extend stroke is the maximum. The external adjuster lets you shorten the extend stroke on-site by up to 50 mm, giving a usable extend range of 0-50 mm. The retract end is fixed, and the stop only sets the end position—it does not lock the load.
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