Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S
The AirTAC SAIJ40X150-50-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 defining feature is the 50mm adjustment range, which creates a 100-150mm usable travel window. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops.
This variant includes a SUS304 stainless steel rod for corrosion resistance and a built-in magnet for position sensing. It supports AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the rear screw acts purely as a travel stop for deceleration, not a lock to hold the load without live air.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAIJ40BX150-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 SAIJ40BX150-50S Is Used
Product Changeovers
Dial in the 100-150mm travel window on packaging lines to accommodate different carton sizes without changing the cylinder.
Machine Setup
Fine-tune the retract end-position during commissioning using the rear stopper instead of adding external shims.
Variable End Stops
Adjust the effective stroke dynamically on testing fixtures where the contact point varies by component.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-50S the Right Cylinder?
Choose this 40mm bore when you need more force than the 32mm version (402N push at 0.5 MPa) but want a smaller footprint than the 50mm option (982N). The adjustable 100-150mm travel window is ideal for machines handling multiple product sizes, whereas a fixed SAI cylinder locks you into one exact stroke. For exact ISO 15552 replacement matching, confirm the 40mm bore, 150mm nominal stroke, 50mm adjustment, PT tapered port threads, and the -S magnet option.
Because the 150mm stroke is under the 300mm threshold, side-load stress is moderate, but always ensure proper guiding for rigid loads. Remember that the rear adjuster only sets the travel end; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX150-50S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster allows you to shorten the 150mm nominal stroke by up to 50mm, creating a usable travel window of 100-150mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without air pressure.
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