Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-100 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 SAIJ125AX100-100
The AirTAC SAIJ125X100-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a substantial 6136N push force at 0.5 MPa and uses a PT G1/2 port. The SUS420J2 stainless steel rod offers good corrosion resistance for demanding environments. By turning the rear screw, you can trim the nominal 100mm stroke back by up to 100mm, creating a 0-100mm usable travel window. This allows precise end-position tuning at commissioning without swapping the cylinder or bolting on external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. This adjustable stopper acts only as a travel end deceleration device; it does not hold the load without live air. For load-holding without pressure, consider the SAIL or BSAI series. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-100 |
|---|---|
| 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 SAIJ125AX100-100
| 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 SAIJ125AX100-100 Is Used
Product Changeovers
Dial in the 0-100mm travel window during format size changes on packaging lines without replacing the actuator.
Commissioning Tuning
Fine-tune the retract end position during machine setup to perfectly align heavy 6136N press loads.
Adjustable End Stops
Use the rear screw to set variable end stops for assembly processes that require flexible positioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-100 the Right Cylinder?
Choose this 125mm bore if your application requires the 6136N thrust at 0.5 MPa, which is a significant step up from the 80mm bore offering 2513N. An adjustable stroke is ideal for product-size changeovers on a line, letting you fine-tune the end stop on the fly versus a fixed SAI cylinder. When replacing an ISO 15552 cylinder, match the 125mm bore, 100mm stroke, 100mm adjustment, PT G1/2 port, and mounting. Since no magnet is specified, you cannot use CMSE or DMSE sensors without changing the piston. The 32mm rod diameter handles high side loads well, but for any stroke over 300mm, an external guide is recommended to prevent rod binding.
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 SAIJ125AX100-100 FAQ
At 0.5 MPa, the push force is 6139N and the pull force is 5734N. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to trim the effective stroke by up to 100mm from the nominal 100mm, giving a 0-100mm travel window. It acts as a stop and does not lock the load without air pressure.
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Standard models usually ship in 3-4 days.
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