Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40
The AirTAC SAIJ100X125-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you fine-tune the retract end position without swapping hardware. It provides a usable travel window of 85 to 125 mm, giving you precise control over machine setup and product-size changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors.
Delivering 3927 N of push force and 3681 N of pull force at 0.5 MPa, this 100 mm bore unit handles substantial loads. The piston rod is constructed from SUS420J2 stainless steel (code A) for enhanced corrosion resistance, and the PT tapered port threads ensure a reliable, sealed pneumatic connection. The rear adjuster acts purely as a travel stop to set the end position, so it does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 Is Used
Machine Changeover
Dial in the exact 85 to 125 mm retract position during product size changes on a packaging line without swapping out the entire actuator.
End-Stop Calibration
Use the rear adjuster to fine-tune the final end position at commissioning, compensating for mechanical tolerances in the fixture.
High-Force Positioning
Leverage the 3927 N push force at 0.5 MPa to move and stop heavy pallets or machine tooling components at a variable end point.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 the Right Cylinder?
Select this 100 mm bore cylinder when your application requires high force (up to 801 kgf at 1.0 MPa) alongside variable end-stop positioning. If your changeover requirements demand less travel or lower force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa. Because this model features a 125 mm stroke, the 25 mm rod diameter provides excellent rigidity and side-load capacity, though for any stroke of 300 mm or more you must use an external guide to prevent rod binding.
The adjustable stroke is ideal for commissioning fine-tuning without adding external stops, but note that the rear screw and air cushions only decelerate the travel end; they do not function as a lock. For load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, verify the 100 mm bore, 125 mm stroke, 40 mm adjustment, PT G1/2 port, and your required mounting set (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ 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 Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-40 FAQ
At a standard 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At its maximum rated pressure of 1.0 MPa, it can deliver up to 801 kgf of push force.
The rear adjuster screw lets you shorten the nominal 125 mm stroke by up to 40 mm, creating a usable travel window of 85 to 125 mm. The adjuster acts as a mechanical stop to set the end position and does not hold the load without continuous air pressure.
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