Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 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 SAIJ50 Adjustable Cylinder SAIJ50AX225-75S
The AirTAC SAIJ50X225-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 225mm travel by up to 75mm, creating a highly flexible 150-225mm usable window. Delivering 982N of push force and 825N of pull force at 0.5MPa, it is built to handle demanding changeover routines without requiring physical cylinder swaps.
This specific SKU is configured with a SUS420J2 stainless steel rod for superior corrosion resistance and includes a built-in magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the rear adjuster functions strictly as a travel stop to fine-tune end positions, not as a load-holding lock.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX225-75S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance from 150 to 225mm during setup to accommodate varying material thicknesses without adding external mechanical stops.
Production Line Changeover
Quickly reconfigure the stroke window when switching between product sizes on a conveyor, reducing machine downtime and eliminating the need to swap cylinders.
Corrosion-Resistant Actuation
Leverage the SUS420J2 stainless steel rod and adjustable travel for precise, repeatable end-position tuning in environments requiring higher material durability.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-75S the Right Cylinder?
Select this 50mm bore unit when an application requires a variable end-stop within a 150-225mm range. If you need less force, stepping down to a 40mm bore yields 628N push at 0.5MPa, while stepping up to a 63mm bore provides 1559N. Choose this adjustable-stroke model over a fixed SAI cylinder when you need to fine-tune the retract end during machine commissioning or accommodate multiple product sizes on the same line. The PT tapered port and G3/8 thread interface are standard for this bore size.
For ISO 15552 replacement matching, verify the 50mm bore, 225mm stroke, 75mm adjustment range, PT port thread, and -S magnet requirement. Note that SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. Because the nominal stroke is 225mm, side loads are manageable, but for any stroke over 300mm, an external guide is mandatory. Since the rear adjuster only halts travel, use a SAIL or BSAI cylinder if the load must be held without live air pressure.
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 SAIJ50 Adjustable Cylinder SAIJ50AX225-75S FAQ
At a 0.5MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At the maximum 1.0MPa pressure, it can deliver up to 200kgf.
The rear adjusting screw acts as a mechanical stop that allows you to shorten the effective stroke from its nominal 225mm down to a minimum of 150mm. This creates a 75mm tuning window for fine-tuning the end position at commissioning without replacing the cylinder.
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