Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-10S 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 SAIJ125AX750-10S
The AirTAC SAIJ125X750-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa. Featuring a 750 mm nominal stroke, the external stopper allows you to dial back the travel by up to 10 mm, creating a precise 740-750 mm usable window for fine-tuning end positions during commissioning.
This unit integrates a SUS420J2 stainless steel rod for enhanced durability and includes a magnet (-S) for position sensing. You can mount CMSE reed or DMSE electronic switches directly into the sensor grooves on both sides of the extruded aluminum barrel. The PT tapered port threads match the G1/2 standard for this bore size.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-10S |
|---|---|
| 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 SAIJ125AX750-10S
| 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 SAIJ125AX750-10S Is Used
Large Part Machining
Dial in the 740-750 mm travel window to precisely clamp heavy castings during CNC machining operations.
Product Size Changeover
Quickly adjust the end-stop by up to 10 mm on automated lines when switching between similar product lengths.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to push heavy pallets or workpieces into staging areas.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-10S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore (10053 N) would be excessive. The adjustable-stroke design is favored over a fixed SAI cylinder when you need variable end-stops for product changeovers without physically swapping the actuator. Because the stroke is 750 mm, the 32 mm rod diameter requires external guiding to prevent excessive side-loading on the seals.
For an exact ISO 15552 replacement, match the 125 mm bore, 750 mm stroke, 10 mm adjustment, PT port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Remember that the rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. For pilot-operated load holding, consider the SAIL or BSAI series.
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 SAIJ125AX750-10S 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 0.9 MPa, the push force increases to 11045 N.
The rear adjusting screw acts as an external stopper, allowing you to shorten the effective travel by up to 10 mm. This creates a 740-750 mm usable stroke window for fine-tuning without needing external stops.
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