Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S 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 SAIJ125X75-40S
The AirTAC SAIJ125X75-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 35 to 75 mm window. Equipped with a -S magnet, it integrates seamlessly with CMSE reed and DMSE electronic sensors for precise position detection. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with a robust 32 mm carbon steel rod and M27x2 thread.
This adjustable-stroke design eliminates the need to swap cylinders during machine setup or product changeovers, letting you dial in the exact retract end-position without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S |
|---|---|
| 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 SAIJ125X75-40S
| 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 SAIJ125X75-40S Is Used
Product Changeover
Dial in the retract stroke from 35 to 75 mm instantly when switching product sizes on a packaging line, avoiding mechanical cylinder swaps.
Heavy Pressing
Leverage 6136 N of thrust at 0.5 MPa for heavy-duty pressing and forming operations that require exact end-position tuning at commissioning.
Machine Setup
Fine-tune the end-stop during initial machine commissioning to perfect timing and positioning without fabricating custom external spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires substantial force—such as the 6136 N push thrust at 0.5 MPa—combined with variable end-stop positioning. If your setup needs less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The PT tapered porting ensures a tight, reliable air connection.
Because the rear adjuster acts solely as a mechanical stop to set deceleration and travel length, it will not hold a load without live air pressure. For fail-safe load holding, consider the SAIL pneumatic lock series or an external rod lock. To match this ISO 15552 dimensionally interchangeable cylinder, specify: 125 mm bore, 75 mm stroke, 40 mm adjustment, PT G1/2 port, and the -S magnet 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 SAIJ125X75-40S FAQ
The rear adjuster acts as a mechanical stop that shortens the nominal 75 mm stroke by up to 40 mm, providing a usable travel window of 35 to 75 mm. It sets the end-position and works with the air cushion for deceleration, but it does not lock the load without live air pressure.
At a 0.5 MPa operating pressure, the SAIJ125X75-40-S generates 6136 N of push force and 5734 N of pull force. It can deliver up to 8590 N of push force at 0.7 MPa.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.