Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-30
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-30 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 JSIJ125X50-30
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty motion into a body noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminium barrel keeps the assembly light, while the G1/2 port feeds a 32 mm rod that transfers 8590 N at 0.7 MPa. It handles about 3682 N of real work safely, which means roughly 313 kg lifted vertically with a 2:1 margin.
The -30 code means an external stop screw lets you shorten the extend stroke on-site by up to 30 mm, giving a usable 20-50 mm window without swapping the cylinder. The retract end stays fixed. This SKU has no magnet and cannot take a CMSE or DMSE sensor. Note that the 33 mm adjustable air cushions only decelerate the load near the ends; they do not hold it on air loss, so fit an external rod lock or pilot-operated check valve for vertical safety.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-30 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-30 |
|---|---|
| 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 JSIJ125X50-30
| 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 JSIJ125X50-30 Is Used
Heavy Pallet Forming
Apply up to 8590 N at 0.7 MPa to compress heavy pallets, using the 30 mm adjuster to fine-tune the final 20-50 mm pressing distance on-site.
Stamping End-Stop
Set a precise 35 mm extend position for light stamping tasks, leveraging the 125 mm bore's raw 6136 N thrust without changing the cylinder body.
Bulk Gate Actuation
Shift heavy bulk-handling gates where a compact JIS profile saves frame space, dialing the stroke down 10 mm from maximum to clear obstructions.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X50-30 the Right Cylinder?
At the top of the range, this 125 mm bore pushes 6136 N at 0.5 MPa; dropping to an 80 mm bore cuts that to 2513 N, so verify your load margin carefully. The on-site extend-shortening window is ideal when you need to fine-tune a 20-50 mm end position across shared spares. Mount using the FA, LB, TC, TCM1 or TCM2 brackets. Because this SKU lacks the -S magnet, you cannot fit CMSE or DMSE sensors. Keep the 32 mm rod guided against side loads, especially on longer builds.
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 JSIJ125X50-30 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 max force is 1251 kgf at 1.0 MPa. It uses a G1/2 port, a 32 mm rod, and 33 mm adjustable air cushions at both ends.
The nominal 50 mm stroke is the maximum. The external -30 adjuster lets you shorten the extend stroke on-site by up to 30 mm, giving a usable range of 20-50 mm. The retract end is fixed, and this stop only sets the end position; it is not a load lock.
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