Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30S 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 SAIJ40BX220-30S
The AirTAC SAIJ40X220-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 628N of push force at 0.5 MPa. Its 220mm nominal stroke can be dialed back by up to 30mm, creating a precise 190-220mm usable travel window for fine-tuning end positions during commissioning. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE and DMSE sensors. The PT tapered port thread ensures a tight pneumatic seal. The rear adjuster acts purely as a mechanical stop to set the retract position and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30S |
|---|---|
| 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 SAIJ40BX220-30S
| 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 SAIJ40BX220-30S Is Used
Product Changeovers
Dial in the 190-220mm travel window during format changes on a packaging line, using the rear screw to set new end positions without replacing hardware.
Machine Setup
Fine-tune the retract end-stop during initial commissioning to dial out mechanical interference and achieve exact positioning before locking down the system.
Variable End Stops
Adapt clamping or pressing depth on the fly for different part sizes, relying on the 30mm adjustment range rather than installing fixed stopper blocks.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30S the Right Cylinder?
Choose this 40mm bore when you need 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) for heavier loads, or down from a 50mm bore (982N) to save space. An adjustable stroke is ideal for product changeovers on a line, allowing you to shift the end-stop without swapping the cylinder or adding external stops. For load-holding without live pressure, consider the SAIL or BSAI series, as this adjuster is not a lock.
To match this ISO 15552 interchangeable cylinder, specify a 40mm bore, 220mm stroke, 30mm adjustment, PT ports, SUS304 (B) rod material, and the -S magnet. With a 220mm stroke, ensure external guides support any side loads, as the 16mm rod handles only moderate lateral forces.
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 SAIJ40BX220-30S FAQ
The rear adjuster allows you to shorten the effective travel by up to 30mm, providing a usable stroke window of 190-220mm. It functions as a mechanical stop for end-position tuning and is not a locking mechanism.
At 0.5 MPa, it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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