Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S
The AirTAC SAIJ125X750-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore, generating 6136 N of push force at 0.5 MPa, and utilizes a PT tapered G1/2 port. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This model provides a 675-750 mm usable travel window, letting you shorten the effective stroke by up to 75 mm during commissioning. The 32 mm SUS420J2 stainless steel rod offers high corrosion resistance, while the extruded aluminum barrel design maintains standard ISO 15552 dimensions without relying on tie-rods.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 SAIJ125AX750-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAIJ125AX750-75S Is Used
Product Changeovers
Dial in the 675-750 mm travel window during line changeovers to accommodate different product lengths without physically replacing the cylinder.
Variable End Stops
Fine-tune the retract position on long-stroke conveyor sorting mechanisms to adapt to varying package sizes on the fly.
Machine Setup
Eliminate the need for external mechanical stops during initial machine commissioning by using the built-in 75 mm rear adjustment screw.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-75S the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N at 0.5 MPa) is insufficient but the 160 mm bore is too large. The 75 mm rear adjuster is ideal for product changeovers, letting you fine-tune end positions without swapping cylinders or adding external stops. Because the 750 mm stroke is long, an external guide is recommended to prevent rod side-load damage.
For drop-in ISO 15552 replacement, match the 125 mm bore, 750 mm stroke, 75 mm adjustment, PT G1/2 port, and -S magnet. Remember the rear adjuster only sets the travel end; it does not hold the load without live air. For load-holding without pressure, use a SAIL or BSAI cylinder.
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 SAIJ125AX750-75S FAQ
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster acts as a mechanical stop, allowing you to trim the effective travel back from 750 mm down to 675 mm. It only sets the end position and does not lock the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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