Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X400-75S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X400-75S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 400mm 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
- Stroke400 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 JSIJ125X400-75S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty actuation into a compact footprint that is noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminium extruded barrel houses a 32 mm rod, and the G1/2 port feeds the double-acting single-rod system at speeds of 30-500 mm/s. It handles about 3682 N of real work safely, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
The -75 code means an external stop screw lets you shorten the extend stroke on-site by up to 75 mm, giving a usable range of 325-400 mm without swapping the cylinder. Because the -S variant includes a piston magnet, you can drop CMSE or DMSE reed and electronic switches straight into the side grooves. The retract end remains fixed, and while the 33 mm adjustable air cushions decelerate the payload smoothly, they do not lock the load—use an external rod lock or pilot-operated check valve if you need to hold position against air loss.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X400-75S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X400-75S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 400 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 JSIJ125X400-75S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×400 | 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 JSIJ125X400-75S Is Used
Heavy Pallet Lifting
Raises 300 kg pallet loads in packaging lines, using the 75 mm extend window to fine-tune the exact raise height for different pallet thicknesses without changing the cylinder.
Press Tonnage Adjustment
Drives a light assembly press where the 325-400 mm stroke range lets operators set the precise bottom dead center on-site, ensuring consistent clamping force across varied product batches.
Automated Storage Retrieval
Actuates heavy vertical shuttle doors, relying on the built-in magnet and CMSE sensors to confirm door position while the 33 mm cushions absorb the deceleration at the end of travel.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X400-75S the Right Cylinder?
When sizing this actuator, the 125 mm bore sits at the top of the range, so stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N. If you need more than the 6136 N available here, you are at the ceiling and must explore twin-cylinder setups or larger custom units. The 75 mm adjustable window is ideal for sharing a single spare cylinder across multiple machines that need slightly different extend end-positions between 325 and 400 mm. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. Since the 400 mm stroke creates leverage, always support the rod against side-load bending with an external linear guide to prevent premature seal wear.
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 JSIJ125X400-75S FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull force. At 0.7 MPa those figures rise to 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 port, a 32 mm rod with an M27x2.0 thread, and operates at 30-500 mm/s.
The nominal 400 mm stroke is the maximum extend length. The external adjuster screw lets you shorten the extend stroke on-site by up to 75 mm, giving a usable range of 325-400 mm for precise end-position tuning. The retract end is fixed, and the adjuster only sets the stop position—it does not lock or hold the load.
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