Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-50 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 SAIJ125AX750-50
The AirTAC SAIJ125X750-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel end-position. It provides a usable stroke window of 700-750 mm, letting you trim the effective extension without swapping out the physical barrel. This model delivers robust performance with 6136 N of pull force at 0.5 MPa and reaches a maximum of 1251 kgf at 1.0 MPa.
The piston utilizes a SUS420J2 stainless steel rod (material code A) for enhanced durability against lateral stress. It features PT tapered port threads and variable air cushions at both ends to decelerate heavy loads. Remember that the rear adjuster acts purely as a travel stop and does not mechanically hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-50 |
|---|---|
| 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 SAIJ125AX750-50
| 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 SAIJ125AX750-50 Is Used
Product Changeover
Dial in the 700-750 mm travel window during format size changes to set new reject or positioning parameters without adding physical spacers.
End-Stop Tuning
Fine-tune the final retract position during machine commissioning to perfectly align heavy 125 mm bore loads with downstream equipment.
Heavy Material Handling
Push large pallets or heavy components using up to 1251 kgf of force while relying on the dual air cushions to smoothly decelerate the mass.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-50 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2268 N pull at 0.5 MPa) lacks the thrust to move your payload, but you want to avoid stepping up to a 160 mm unit that pulls 9425 N. The 50 mm adjustable window is ideal for product changeovers on a packaging line, allowing you to shift the end-stop precisely without installing external physical stops. To replace an ISO 15552 cylinder, match the 125 mm bore, 750 mm stroke, PT port thread, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interfaces.
Because the 750 mm stroke is substantial, an external guide is strongly recommended to prevent excessive side-loading on the unsupported rod. Furthermore, if your application requires the load to be held in place during a complete air pressure loss, do not rely on the adjuster or cushion; instead, specify an SAIL pneumatic lock or BSAI clamp-lock 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 SAIJ125AX750-50 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 50 mm, creating a usable travel window of 700-750 mm. This allows you to fine-tune the end position at commissioning or during product changeovers without replacing the cylinder.
At an operating pressure of 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At the maximum rated pressure of 1.0 MPa, it can deliver up to 1251 kgf.
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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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