Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10 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 SAIJ125X475-10
The AirTAC SAIJ125X475-10 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stopper that trims the retract position. With a nominal 475 mm stroke and a 10 mm adjustment range, it provides a precise 465-475 mm usable travel window for fine-tuning end positions during commissioning. Belonging to the 125 mm bore class, it delivers 6136 N of push force at 0.5 MPa and utilizes a robust 32 mm carbon steel rod with an M27x2 thread.
This made-to-order pneumatic actuator operates at speeds of 30-500 mm/s and includes variable air cushions at both ends to manage kinetic energy. It supports a reduced set of ISO 15552 mounting interfaces—specifically Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR styles. The extruded aluminum barrel incorporates sensor grooves on both sides, ready for CMSE or DMSE switches if a magnet is added later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10 |
|---|---|
| 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 SAIJ125X475-10
| 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 SAIJ125X475-10 Is Used
Product Size Changeover
Dial in the 465-475 mm travel window during format conversions on packaging lines, avoiding the need to physically swap out long-stroke cylinders.
Machine Setup Tuning
Fine-tune the retract end-position at commissioning to achieve exact mechanical alignment without adding external stopper blocks to the machine frame.
Heavy Forming End-Stop
Leverage the 6136 N push force at 0.5 MPa for heavy pressing tasks while using the rear screw to precisely set the bottoming-out depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-10 the Right Cylinder?
Select this 125 mm bore actuator when an application requires substantial thrust—such as 6136 N at 0.5 MPa—combined with exact end-position tuning. If your process needs less force, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The 10 mm rear adjuster is chosen over a fixed-stroke SAI cylinder when you need variable end-stops for product size changeovers without swapping hardware.
Because the stroke extends to 475 mm, the 32 mm rod and M27x2 thread still require an external guide to prevent excessive side-loading on the piston. Ensure your ISO 15552 replacement matches the 125 mm bore, 475 mm stroke, PT tapered port thread, and the chosen mounting style. Remember that the rear stopper and air cushions only decelerate the travel; they do not hold the load without live air, so consider a SAIL or BSAI cylinder if true locking is required.
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 SAIJ125X475-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the nominal 475 mm stroke by up to 10 mm, creating a 465-475 mm usable travel window. It sets the end position but does not lock the load without continuous air pressure.
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