Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S
The AirTAC SAIJ125X70-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and a built-in magnet for position sensing. By turning the rear screw, you can fine-tune the effective travel within a precise 60 to 70 mm window without adding external stops.
This adjustable-stroke design is ideal for product changeovers on the factory floor. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. The 32 mm rod and M27x2 thread provide robust load handling, while the PT tapered port ensures a secure pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 70 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 SAIJ125AX70-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×70 | 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 SAIJ125AX70-10S Is Used
Precision Position Tuning
Dial in the exact 60-70 mm end-of-stroke position during machine commissioning to achieve perfect workpiece alignment without mechanical shims.
Product Size Changeover
Quickly adapt the cylinder's stroke window on automated lines when switching between product variants, minimizing downtime between production runs.
High-Force Clamping
Leverage the 6136 N push force at 0.5 MPa to securely clamp heavy components, using the rear stopper to prevent over-travel on delicate parts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX70-10S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires high thrust (6136 N push at 0.5 MPa) and exact end-position tuning. If you need less force, the 100 mm bore offers 3927 N push at 0.5 MPa. The 10 mm adjustment range allows you to dial in the 60-70 mm travel window during commissioning, avoiding the need to swap out a fixed-stroke SAI cylinder for minor position corrections.
This SAIJ125X70-10-S is dimensionally interchangeable per ISO 15552. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air; for load-holding requirements, consider an AirTAC SAIL or BSAI cylinder. Operating speed is 30-500 mm/s.
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 SAIJ125AX70-10S 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 nominal 70 mm stroke by up to 10 mm, creating a usable travel window of 60 to 70 mm. The adjuster acts as a mechanical stop and does not lock the position without continuous air pressure.
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