Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-40 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 SAIJ125AX750-40
The AirTAC SAIJ125X750-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to trim the effective travel back by up to 40 mm. This yields a usable end-position window of 710-750 mm, which is ideal for fine-tuning machinery setup without adding external stops. It features a robust 32 mm SUS420J2 stainless steel rod and generates a substantial 6136 N pull force at 0.5 MPa.
Because the 750 mm stroke is highly extended, the integrated rear adjuster acts purely as a travel stop to set deceleration limits. It does not hold the load without live air pressure. The extruded aluminum barrel includes dual sensor grooves, and the PT G1/2 porting handles high flow requirements. For load-holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-40 |
|---|---|
| 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 SAIJ125AX750-40
| 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 SAIJ125AX750-40 Is Used
Press Tonnage Tuning
Dial in the exact 710-750 mm end-of-stroke position during machine commissioning to accommodate varying material thicknesses without adding external mechanical stops.
Product Changeover Diverter
Quickly adjust the retract distance by up to 40 mm when switching the line to handle different package sizes, keeping the 6136 N pull force ready for heavy pallets.
Heavy Assembly Station
Leverage the 125 mm bore and SUS420J2 rod to move heavy components into place, using the rear stopper to fine-tune the final presentation height.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-40 the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N push at 0.5 MPa) is insufficient for your clamping or lifting requirements, but you want to avoid the massive 160 mm frame. The 40 mm adjustment window is highly valuable for product changeovers on a line, allowing you to dial in the exact 710-750 mm end position at commissioning rather than swapping a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 750 mm stroke, 40 mm adjustment range, PT G1/2 port, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Because the stroke is 750 mm, an external guide is strongly recommended to prevent side-load damage to the rod and seals. Note that this configuration lacks a magnet (-S); if CMSE or DMSE sensors are needed, specify the -S option.
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 SAIJ125AX750-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 6136 N of push force. At the maximum 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw lets you shorten the 750 mm nominal stroke by up to 40 mm, creating a 710-750 mm travel window. It acts as a physical stop to set the end position and does not lock the load without live air.
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