Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S
The AirTAC SAIJ125X100-30-S is a double-acting ISO 15552 profile cylinder featuring a precision rear stroke adjuster. It provides a usable travel window of 70 to 100 mm, allowing you to dial in the exact retract end-position during commissioning without physically swapping the cylinder or adding external stops. Equipped with a 32 mm SUS420J2 stainless steel rod (option A), it handles substantial thrust up to 6136 N at 0.5 MPa while offering superior corrosion resistance.
This model includes a built-in magnet for position sensing, working seamlessly with AirTAC CMSE reed switches and DMSE solid-state electronic sensors mounted in the dual-side extruded barrel grooves. The rear adjustment screw functions strictly as a travel stop to fine-tune deceleration and end limits; it is not a mechanical lock. For load-holding without live air pressure, explore the SAIL pneumatic lock or BSAI clamp-lock cylinder families.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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, 40 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 (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 SAIJ125 Adjustable Cylinder SAIJ125AX100-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX100-30S Is Used
Machine Changeover
Quickly reconfigure the retract distance by up to 30 mm during product size transitions on a packaging line without disassembling the actuator.
End-Position Tuning
Fine-tune the exact stopping point of a heavy press operation during initial commissioning to avoid mechanical hard stops and ensure precise alignment.
Variable End Stops
Provide a flexible 70 to 100 mm travel window for automated assembly stations that process multiple part families on the same fixture.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30S the Right Cylinder?
Selecting this 125 mm bore adjustable-stroke cylinder makes sense when your application requires high push forces (up to 8590 N at 0.7 MPa) alongside frequent product changeovers or variable end-stop requirements. If your setup demands less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The PT tapered port thread and G1/2 port size are standard for this bore diameter.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 100 mm nominal stroke, 30 mm adjustment range, PT port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles. Because the 100 mm stroke is relatively short for this large bore, standard side-load concerns are minimized, but an external guide is still recommended for heavy radial loads.
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 SAIJ125 Adjustable Cylinder SAIJ125AX100-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as an external stop, allowing you to shorten the 100 mm nominal stroke by up to 30 mm, creating a usable travel window of 70 to 100 mm. It sets the travel end and deceleration but does not lock the load without live air pressure.
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