Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30S 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 SAIJ125AX750-30S
The AirTAC SAIJ125X750-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 750 mm nominal stroke that can be dialed back by up to 30 mm, creating a 720 to 750 mm usable travel window for precise end-position tuning during commissioning. Equipped with a SUS420J2 stainless steel rod and a PT tapered port, it delivers 8590 N of push force at 0.7 MPa.
This model includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic switches mounted into the extruded aluminum barrel's dual sensor grooves. The rear adjuster acts strictly as a travel stop to decelerate the load, not as a lock; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30S |
|---|---|
| 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 SAIJ125AX750-30S
| 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 SAIJ125AX750-30S Is Used
Product Changeover Tuning
Dial in the 720-750 mm travel window during format changeovers to accommodate different product lengths without reinstalling cylinders or adding external stopper blocks.
Heavy-Duty Pressing
Leverage the 8590 N push force at 0.7 MPa for assembly and pressing tasks, using the rear adjuster to precisely set the final contact position.
Long-Stroke Positioning
Move large pallets or heavy fixtures across a 750 mm span while fine-tuning the retract end-point to match machine hard stops during commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX750-30S the Right Cylinder?
Choose this 125 mm bore when you need higher thrust than an 80 mm bore (which provides 3518 N push at 0.7 MPa) but want to avoid the larger footprint and 10053 N force of a 160 mm bore. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers without swapping out the entire cylinder or adding external mechanical stops.
Because the stroke is 750 mm, the 32 mm rod and M27x2 thread must be paired with an external guide to prevent excessive side-loading and premature seal wear. This cylinder is dimensionally interchangeable per ISO 15552 and supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). The operating speed is 30 to 500 mm/s.
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 SAIJ125AX750-30S FAQ
At a 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. The maximum force at 1.0 MPa is 1251 kgf.
The rear external adjuster screw allows you to shorten the effective travel by up to 30 mm from the 750 mm nominal stroke, providing a 720 to 750 mm usable window. This stopper decelerates the travel end but does not hold the load without live air pressure.
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