Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-30 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 SAIJ125X750-30
The AirTAC SAIJ125X750-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5MPa and provides a usable travel window of 720 to 750mm, letting you dial in the retract position precisely during commissioning without adding external stops.
This 125mm bore unit uses a G1/2 PT port and a robust 32mm carbon steel rod with an M27x2 thread, yielding high side-load resistance for heavy conveying tasks. The extruded aluminum barrel includes dual sensor grooves, and the rear adjuster acts purely as a travel stop, meaning live air is required to maintain the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-30 |
|---|---|
| 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 SAIJ125X750-30
| 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 SAIJ125X750-30 Is Used
Variable End-Stop Tuning
Dial in the retract position within the 720-750mm window during machine setup to accommodate different product sizes without changing hardware.
Heavy Load Positioning
Leverage the 6136N push force at 0.5MPa to push heavy pallets or workpieces, using the rear stop to fine-tune the resting location.
Product Changeover
Quickly adjust the stroke length by up to 30mm on automated lines when switching between product variants, reducing downtime.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-30 the Right Cylinder?
Choose this adjustable-stroke model when you need variable end-position tuning for product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. If your application requires less thrust, stepping down to an 80mm bore yields 2513N at 0.5MPa; for higher force demands, a 160mm bore provides 10053N at 0.5MPa.
Because the 750mm stroke is substantial, an external guide is recommended to protect the rod seal from leveraged side loads. To match this ISO 15552 footprint exactly, specify the 125mm bore, 750mm stroke, 30mm adjustment, G1/2 PT port, and your required mounting style from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead.
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 SAIJ125X750-30 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from 750mm down to 720mm. It is a travel stop and not a lock, so continuous air pressure is needed to hold the load in position.
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