Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100
The AirTAC SAIJ125X140-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 140 mm stroke that can be dialed back by up to 100 mm, yielding a highly flexible 40-140 mm usable travel window for precise end-position tuning. Belonging to the 125 mm bore class, it delivers 6136 N of push force at 0.5 MPa and utilizes a PT tapered port thread.
This unit is built with an SUS420J2 stainless steel rod (material code A) for improved corrosion resistance. The extruded aluminum barrel incorporates sensor grooves on both sides, allowing for the direct mounting of AirTAC CMSE reed or DMSE electronic solid-state switches if position feedback is later required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125AX140-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125AX140-100 Is Used
Product Changeover
Dial in the 40-140 mm travel window during packaging line format changes to accommodate different carton sizes without swapping cylinders.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to perfectly time the pressing action of heavy forming tools.
Adjustable Clamping
Securely clamp varying workpiece heights on an automated assembly fixture by adjusting the stroke rather than repositioning the mount.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires substantial thrust but variable end-stops; if you need less force, stepping down to the 100 mm bore provides 3927 N at 0.5 MPa. The SAIJ125X140-100 is chosen over a fixed-stroke SAI when you need to trim the travel window during commissioning or product changeovers without adding external physical stops. Because the nominal stroke is 140 mm, side-loading is minimal, but always ensure the load is guided to prevent rod binding.
For an exact ISO 15552 dimensional replacement, match the 125 mm bore, 140 mm stroke, 100 mm adjustment range, PT port thread, and your required mounting accessories. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
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 SAIJ125AX140-100 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective travel from the 140 mm nominal stroke by up to 100 mm, creating a usable 40-140 mm window. It functions as a mechanical stop and does not lock the load without continuous air pressure.
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