Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S
The AirTAC SAIJ125X75-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster and a magnetic piston. It delivers a substantial 6136N push force at 0.5 MPa, making it suited for heavy-duty positioning tasks. The integrated PT G1/2 port ensures robust pneumatic flow for its 125mm bore.
This model features a 75mm nominal stroke paired with a 75mm adjustment range, creating a 0-75mm usable travel window for exact end-position tuning during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125X75-75S Is Used
Machine Setup & Changeover
Dial in the exact retract distance from 0 to 75mm during product size changeovers, eliminating the need to physically swap cylinders or reposition external stopper blocks.
Heavy Press Positioning
Leverage the 6136N push force to drive heavy pressing operations, using the built-in adjustment to precisely set the bottoming depth for different material thicknesses.
Sensor-Ready Automation
Utilize the standard -S magnet and dual sensor grooves to easily mount CMSE reed or DMSE solid-state switches for precise end-of-stroke detection in automated cells.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75S the Right Cylinder?
Choose this adjustable model when you need to fine-tune the retract end-position on the fly without adding external stops or swapping cylinders. It is ideal for product changeovers on a line. If your application requires less force, the 100mm bore offers 3927N at 0.5 MPa; for higher force, the 160mm bore provides 10053N. The 32mm M27x2 piston rod handles high side loads well, though an external guide is recommended for optimal longevity.
Remember that the rear adjuster acts purely as a mechanical stop and does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL pneumatic lock or BSAI clamp-lock series. This cylinder is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ125X75-75S FAQ
At a 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At its maximum 1.0 MPa pressure, it delivers up to 1251 kgf of push force.
The rear adjuster screw acts as a mechanical stop that can trim the effective stroke back by up to 75mm from the 75mm nominal stroke, giving you a 0-75mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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