Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75
The AirTAC SAIJ125X225-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. Its external stopper allows you to dial back the 225mm nominal travel by up to 75mm, creating a precise 150-225mm usable window. This built-in adjustability is ideal for fine-tuning end positions during machine commissioning without swapping out the entire actuator.
This specific SKU features a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in harsh environments. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered port threads ensure a reliable, sealed connection. Operating at speeds of 30-500 mm/s, it utilizes adjustable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125BX225-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125BX225-75 Is Used
Assembly Fixture Changeover
Rapidly adapt end positions for varying product lengths on a single assembly line by dialing back the stroke within the 150-225mm window without changing hardware.
Heavy Pressing Operations
Delivers 6136N of push force at 0.5 MPa for securely seating large bearings or forming heavy components, with fine position tuning at commissioning.
Variable Stop Positioning
Acts as an adjustable end-stop for heavy pallets on a conveyor, allowing quick mechanical reconfiguration of the stopping distance during product transitions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX225-75 the Right Cylinder?
Choose this 125mm bore actuator when your application requires high thrust that smaller bores cannot provide, such as stepping up from a 100mm bore that only offers 3927N push force at 0.5 MPa. The 75mm adjustment range is particularly valuable for packaging lines or assembly fixtures where product sizes frequently change, allowing operators to reposition the end-stop rapidly instead of machining new hard stops or installing a different fixed-stroke SAI cylinder.
When ordering, confirm the PT port thread, the SUS304 rod material, and the lack of a magnet (-S not specified). Note that the rear adjuster acts purely as a mechanical travel stop and does not lock the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. Because the 225mm stroke is relatively long for this high-force bore, ensure adequate external guidance to prevent excessive side-loading on the 32mm rod.
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 SAIJ125BX225-75 FAQ
The rear adjusting screw acts as an external stopper that shortens the effective stroke by up to 75mm. This means the 225mm nominal stroke can be fine-tuned down to a 150mm minimum travel distance during commissioning or product changeovers.
At a standard 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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