Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S
The AirTAC SAIJ125X475-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster. This specific configuration yields a usable travel window of 465 to 475 mm, allowing you to dial in the exact end position during commissioning without adding external stops. It delivers 6136 N of push force at 0.5 MPa and features a carbon steel piston rod with an M27x2 thread.
This unit includes a built-in magnet (-S) for position sensing with AirTAC CMSE reed and DMSE electronic switches. The extruded aluminum barrel provides sensor grooves on both sides for flexible mounting. It operates at speeds of 30 to 500 mm/s and uses PT tapered port threads. The rear stopper sets the travel end and deceleration point, but it does not function as a lock to hold loads without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAIJ125X475-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAIJ125X475-10S Is Used
Machine Setup Fine-Tuning
Dial in the exact 465-475 mm end position during initial commissioning to perfectly align tooling without machining custom spacers.
Product Size Changeover
Quickly adapt the retract stroke by up to 10 mm on a packaging line when switching to a slightly different carton or part dimension.
Long-Stroke Material Handling
Utilize the 475 mm travel for pushing heavy 125 mm bore loads while relying on the rear screw to set a hard mechanical stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when your application requires 6136 N of push force at 0.5 MPa, which is a notable step up from the 50 mm bore class providing 982 N. The 10 mm adjustable window is highly beneficial for fine-tuning machine setups or accommodating minor product size changes on a line without physically swapping the cylinder. For load-holding requirements without continuous air pressure, this adjustable stop is insufficient; you should explore an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
Because the 475 mm stroke is relatively long, the 32 mm rod diameter will still experience leverage forces under side-loading. An external guide mechanism is strongly recommended to prevent premature seal wear and rod bending. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports a mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X475-10S FAQ
The rear of the cylinder features an external adjusting screw that acts as a mechanical stopper. For this model, it allows you to shorten the effective travel from the nominal 475 mm down to a minimum of 465 mm, providing a 10 mm tuning window without altering the cylinder mount.
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
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