Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-75
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-75 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 JSIJ125X100-75
Delivering massive thrust in a compact envelope, this 125 mm bore JIS profile cylinder pushes 6136 N and pulls 5734 N at 0.5 MPa. The extruded hard-anodized aluminium barrel omits external rods, making the body shorter than a same-bore ISO 15552 unit while retaining heavy-duty performance. A G1/2 port feeds the 32 mm piston rod, yielding a safe working load around 3682 N, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
The -75 code defines an external stop screw that shortens the extend stroke on-site by up to 75 mm. You can fine-tune the end position anywhere from 25 mm to the 100 mm maximum without swapping the cylinder, while the retract end remains fixed. This SKU lacks a magnet, so it cannot take CMSE/DMSE sensors. Note that the 33 mm adjustable air cushions only decelerate the load; use an external rod lock or pilot-operated check valve to hold a suspended load, as the piston drifts without live air.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-75 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-75 |
|---|---|
| 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 JSIJ125X100-75
| 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 JSIJ125X100-75 Is Used
Press Tonnage Tuning
Dial in the exact 25 to 100 mm extend reach on a heavy stamping press without machining new spacers, using the external adjuster to accommodate varying material thicknesses.
Pallet Positioning Stop
Act as a robust physical stop for heavy pallets on a conveyor, retracting 100 mm to clear the load and adjusting shorter on-site if the pallet profile changes.
Heavy Platen Lowering
Lower a 300 kg platen in a vertical lift rig, relying on the 125 mm bore for high thrust and tweaking the extend window to hit the precise descent floor.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X100-75 the Right Cylinder?
When sizing this 125 mm bore, stepping down to an 80 mm bore yields 2513 N push at 0.5 MPa, whereas this model provides 6136 N. If you need even more force, 125 mm is the largest available JIS profile size in this series. The on-site adjustability is ideal when you need to tune the extend end-point after installation or want a single spare cylinder to cover multiple shorter stroke variants. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2 brackets. Because this is a non-magnetised SKU, it cannot accept position sensors; specify the -S variant if you require CMSE or DMSE switches. For any stroke length over 300 mm, ensure you use a guide rail to prevent side-load damage to the M27x2.0 rod thread and seals.
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 JSIJ125X100-75 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. It operates between 0.15 and 1.0 MPa, tolerates -20 to +70 C, and runs at 30-500 mm/s.
The -75 indicates an external adjuster that lets you shorten the extend stroke by up to 75 mm on-site. The usable extend range is 25 mm up to the 100 mm nominal maximum, while the retract end is fixed. The stop screw sets the end position but does not lock the load.
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