Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm 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.
- BoreØ100 mm
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S
The AirTAC SAIJ100X225-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 185-225 mm window. It delivers a robust 3927 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The barrel is an extruded aluminum profile with sensor grooves on both sides, fully dimensionally interchangeable with ISO 15552 cylinders such as standard SMC or Festo units.
This specific SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. It uses PT tapered ports (G1/2) and relies on variable air cushions at both ends to decelerate the load. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX225-40S Is Used
Variable End-Stop Machining
Dial in the exact 185 to 225 mm clamping position on the fly during CNC fixture changeovers without replacing the cylinder or adding external mechanical stops.
Product Diversion Control
Adjust the stroke length precisely to handle different package sizes on a conveyor line, ensuring proper sorting and pushing force up to 7068 N.
Equipment Commissioning
Fine-tune the retract distance during initial machine setup to perfect timing and avoid mechanical crashes, using the 40 mm rear adjustment screw.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX225-40S the Right Cylinder?
Select this 100 mm bore cylinder when your application requires 3927 N of push thrust at 0.5 MPa, or up to 7068 N at 0.9 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, while moving up to a 125 mm bore provides 6136 N. The adjustable-stroke design is ideal for machine setups requiring a variable end-stop during commissioning or product changeover, preventing the need to physically swap out a fixed-stroke SAI cylinder.
When matching an ISO 15552 replacement, verify the 100 mm bore, 225 mm stroke, 40 mm adjustment range, PT G1/2 port, and the required -S magnet. Because the stroke is 225 mm, ensure adequate side-load support; while the 25 mm SUS304 rod handles high stress, long unsupported strokes still require an external guide. For applications needing the load to be held without live air, the rear stop is insufficient—consider an external rod lock, or switch to AirTAC SAIL or BSAI clamp-lock cylinders.
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 SAIJ100 Adjustable Cylinder SAIJ100BX225-40S FAQ
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 40 mm. This provides a usable travel window of 185 to 225 mm, allowing you to fine-tune the end position at commissioning without swapping the cylinder.
At 0.5 MPa, it provides 3927 N of push force and 3681 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force increases to 7068 N.
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