Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 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 JSIJ125X100-50
Delivering 6136 N of push force at 0.5 MPa, this large-bore JIS actuator brings serious power in a compact package. Its extruded hard-anodized aluminium profile barrel is noticeably shorter than an equivalent ISO 15552 cylinder, saving valuable machine space without losing thrust. The G1/2 port feeds the 32 mm rod to generate up to 1251 kgf of theoretical maximum force at 1.0 MPa.
The external adjuster allows you to shorten the extend stroke on-site by up to 50 mm, giving a usable forward range of 50 to 100 mm while the retract end remains fixed. This on-site tuning handles about 3682 N of safe working load, which translates to lifting roughly 313 kg vertically with a 2:1 margin. Note that this SKU lacks a magnet and cannot take a CMSE or DMSE sensor; you would need the -S variant for position detection.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 JSIJ125X100-50
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×100 | 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 JSIJ125X100-50 Is Used
Press Fit Tuning
Shorten the extend stroke by up to 50 mm on-site to set the exact bottoming position for pressing bearings without changing the cylinder height.
Heavy Pallet Stops
Use the 6136 N push force to halt heavy loaded pallets on a conveyor, adjusting the stop position in 50 mm increments as pallet sizes change.
Stamping Depth Control
Dial in the precise stamping depth on-site using the external adjuster, ensuring consistent part marking without reprogramming the machine cycle.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-50 the Right Cylinder?
When sizing this actuator, consider the neighbouring 100 mm bore if your application only requires 3927 N of push at 0.5 MPa, as stepping down saves air volume and physical footprint. Conversely, if you need more than the 6136 N provided here, the 125 mm bore is the maximum size available in this JIS range. The adjustable stroke feature is highly useful when you need to fine-tune the end position on-site without swapping the cylinder, or when you want a single spare part to cover several stroke variants. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2 brackets. Because the standard 100 mm stroke is relatively short for this bore, side-load guiding is less critical here, but any stroke over 300 mm requires a dedicated linear guide to prevent rod binding.
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 JSIJ125X100-50 FAQ
This cylinder has a 125 mm bore, a 32 mm rod, and a G1/2 port. It generates 6136 N push and 5734 N pull at 0.5 MPa, increasing to 8590 N push and 8028 N pull at 0.7 MPa. The theoretical maximum force is 1251 kgf at 1.0 MPa. It operates at speeds between 30 and 500 mm/s and features a 33 mm adjustable air cushion at both ends.
The nominal stroke is 100 mm, which is the maximum extend length. The external adjuster lets you shorten the extend stroke by up to 50 mm on-site, giving a usable range of 50 to 100 mm. The retract end is fixed. This mechanism only sets the end position and does not lock the load; you need an external rod lock or pilot-operated check valve to hold a load safely on air loss.
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Standard models are processed and dispatched in 3-5 business days.
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