Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-100
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-100 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 JSIJ125X125-100
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty actuation into a surprisingly compact envelope. Its extruded hard-anodized aluminum barrel makes it shorter than a same-bore ISO 15552 unit, saving valuable machine space without sacrificing power. The G1/2 port feeds the 32 mm rod to generate 8590 N at 0.7 MPa, handling about 3682 N of safe working load or lifting roughly 313 kg vertically.
The external stop screw lets you trim the extend stroke on-site by up to 100 mm, dropping the usable forward travel from the 125 mm maximum down to 25 mm without swapping the cylinder. This on-site adjuster sets the end position and the retract end remains fixed. Note that this plain SKU lacks a magnet and cannot take CMSE/DMSE sensors, and the 33 mm adjustable air cushions only decelerate the load rather than holding it on air loss.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-100 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-100 |
|---|---|
| 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 JSIJ125X125-100
| 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 JSIJ125X125-100 Is Used
Press Tonnage Trimming
Dial in the exact 25 to 125 mm extend reach on heavy stamping presses without machining new spacers, using the external adjuster to hit varying material thicknesses on the fly.
Pallet Positioning Stops
Absorb the 5734 N pull load at 0.5 MPa while acting as a robust physical stop for heavy inbound pallets, retracting precisely to clear varying load widths.
Mold Ejection Control
Fine-tune the ejection stroke window on large injection molds directly at the machine, ensuring delicate parts are pushed free without over-traveling.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-100 the Right Cylinder?
When sizing this actuator, stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927 N, while stepping up is not an option as 125 mm is the largest available bore. The 100 mm adjuster window is ideal for sharing a single spare cylinder across multiple machines that need slightly different extend end positions, letting mechanics fine-tune travel on the floor. You can mount it via Basic, FA, LB, TC, TCM1, or TCM2 brackets. Because this is a non-magnetized SKU, position sensing is impossible; add the -S suffix variant if your application requires CMSE/DMSE switches. For any stroke over 300 mm, always use external guide rails to prevent side-load damage to the rod 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 JSIJ125X125-100 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull; at 0.7 MPa it yields 8590 N push and 8028 N pull. The theoretical maximum is 1251 kgf at 1.0 MPa. It features a 125 mm bore, a 32 mm rod with an M27x2.0 thread, a G1/2 port, 33 mm adjustable cushions at both ends, and operates at 30-500 mm/s.
The -100 code means the nominal 125 mm extend stroke can be shortened by up to 100 mm on-site via an external stop screw, giving a usable forward travel range of 25 to 125 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 against air loss.
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