Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-50S 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 SAIJ125X475-50S
The AirTAC SAIJ125X475-50-S is a double-acting, single-rod profile cylinder dimensionally interchangeable per ISO 15552. It features a rear-mounted stroke adjuster that allows you to fine-tune the end position, creating a usable travel window of 425 to 475 mm for this specific SKU. Built with a standard carbon steel rod and a -S magnet, it operates seamlessly with AirTAC CMSE reed and DMSE electronic sensors via the dual-sided sensor grooves.
Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this 125 mm bore actuator handles heavy loads with variable air cushions at both ends. The rear screw acts as a travel stop for precise commissioning rather than a load lock, and the extruded aluminum barrel design omits tie-rods for a robust, integrated structure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-50S |
|---|---|
| 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 SAIJ125X475-50S
| 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 SAIJ125X475-50S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 425-475 mm window during machine setup to accommodate varying material lengths without external stops.
Product Size Changeover
Quickly adjust the cylinder's effective stroke on packaging lines when switching between different package dimensions, minimizing downtime.
Heavy-Duty Positioning
Leverage the 6136 N push force to move substantial jigs or fixtures into their final position, relying on the rear stop for repeatable end-location.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X475-50S the Right Cylinder?
Choose this adjustable model when you need to dial in a specific end-stop during product changeovers without swapping out the entire actuator. If your application requires less force, stepping down to a 100 mm bore yields 3927 N of push at 0.5 MPa; conversely, a 160 mm bore provides 10053 N for heavier demands. Because the nominal stroke is 475 mm, an external guide is recommended to prevent excessive side-loading on the 32 mm rod.
This SAIJ configuration includes a PT tapered port thread, a standard carbon steel rod, and a -S magnet for position sensing. It supports the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) while omitting FB, CA, CB, and CR mounts. Remember that the rear adjuster only sets the travel end and will not hold the load without live air—if you need true load-holding, consider the SAIL or BSAI series.
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 SAIJ125X475-50S FAQ
The rear adjuster allows you to shorten the nominal 475 mm stroke by up to 50 mm, providing an effective travel window of 425 to 475 mm. This lets you fine-tune the end position at commissioning without adding external stops.
At an operating pressure of 0.5 MPa, the SAIJ125X475-50-S provides 6136 N of push force and 5734 N of pull force. It can deliver up to 11045 N of push force at 0.9 MPa.
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Standard models usually ship in 3-4 days.
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