Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 220mm 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.
- BoreØ40 mm
- Stroke220 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S
The AirTAC SAIJ40X220-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 220 mm stroke that can be fine-tuned backward by up to 20 mm, creating a precise 200 to 220 mm usable travel window for commissioning without external stops. At 0.7 MPa operating pressure, the 40 mm bore delivers 879 N of push force and 724 N of pull force.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing with CMSE reed or DMSE electronic switches. The extruded aluminum barrel includes sensor grooves on both sides, and the PT G1/4 porting integrates smoothly into existing pneumatic layouts.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 220 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×220 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX220-20S Is Used
Product Changeover
Dial in the 200-220 mm travel window during format changes without physically swapping the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to absorb mechanical tolerances and achieve precise positioning.
Variable End Stops
Adjust the stroke dynamically on packaging lines to handle varying product sizes on the fly without halting the entire process.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20S the Right Cylinder?
Choose this 40 mm bore adjustable cylinder when an application requires exact end-position tuning at machine changeover, stepping down from a 50 mm bore (1374 N push at 0.5 MPa) to save space, or up from a 32 mm bore (402 N push at 0.5 MPa) for added force. The rear adjuster acts solely as a travel stop and does not hold the load without live air pressure; for true load-holding, select an SAIL or BSAI series cylinder. As a dimensionally interchangeable ISO 15552 cylinder, it matches standard bore, stroke, and port footprints.
Because the 220 mm stroke exceeds 300 mm is not applicable here, but note that long unsupported strokes still require an external guide to manage side loads. The SAIJ mounting set omits FB, CA, CB, and CR options, offering Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces. The included -S magnet enables precise end-of-stroke detection.
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 SAIJ40 Adjustable Cylinder SAIJ40BX220-20S FAQ
The rear adjusting screw allows you to shorten the effective stroke by up to 20 mm, providing a usable travel window of 200 to 220 mm. It functions as a mechanical stop to set the end position and does not lock or hold the load without continuous air pressure.
At 0.7 MPa, it provides 879 N of push force and 724 N of pull force. The standard speed range for this bore size is 30-800 mm/s, operating with a G1/4 PT port.
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