Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-50 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 SAIJ40BX220-50
The AirTAC SAIJ40X220-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from 220 mm to a 170 mm minimum. This 50 mm adjustment window is ideal for dialing in exact end-of-stroke positions during commissioning without adding external stops. It delivers 628 N of pull force at 0.5 MPa and reaches speeds up to 800 mm/s.
This variant features a SUS304 stainless steel piston rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-50 |
|---|---|
| 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 SAIJ40BX220-50
| 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 SAIJ40BX220-50 Is Used
Machine Changeover
Dial in the 170-220 mm travel window during product size transitions without physically swapping cylinders or repositioning hard stops.
End-Position Tuning
Fine-tune the retract end position during commissioning to absorb mechanical tolerance and achieve exact placement accuracy.
Variable Diverter
Adjust the stroke on the fly to accommodate different package sizes on a sorting line, ensuring precise routing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-50 the Right Cylinder?
Choose this 40 mm bore when you need 628 N pull force at 0.5 MPa and a highly variable end-stop. If your application requires less force, step down to the 32 mm bore (345 N pull); if you need more clamping power, step up to the 50 mm bore (825 N pull). The 50 mm adjustment range is perfect for product-size changeovers on a line. Remember that the rear adjuster acts only as a travel stop, not a lock; the air cushion decelerates the load but will not hold it without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders. To match this configuration exactly, select a 40 mm bore, 220 mm stroke, 50 mm adjustment, PT ports, and no magnet. Because the 220 mm stroke is relatively long, ensure you use an external guide to prevent excessive side loading on the 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 SAIJ40 Adjustable Cylinder SAIJ40BX220-50 FAQ
The rear adjuster allows you to shorten the 220 mm nominal stroke by up to 50 mm, providing a usable travel window of 170 to 220 mm. It acts as a mechanical stop to set the end position, but it is not a lock and cannot hold the load without live air pressure.
At 0.5 MPa, it provides 628 N of pull force and 402 N of push force. At the maximum operating pressure of 1.0 MPa, it delivers up to 128 kgf.
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