Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10
The AirTAC SAIJ40X50-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 40 to 50 mm. Delivering 628 N of push force at 0.5 MPa, it is equipped with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a robust pneumatic seal.
The rear adjustment screw lets you dial in the exact end-of-stroke position during commissioning without adding external stops. Remember that this adjuster acts only as a travel stop; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAIJ40BX50-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SAIJ40BX50-10 Is Used
Stroke Fine-Tuning
Dial in the exact 40 to 50 mm travel distance during machine setup to perfect end-positioning without external stops.
Product Changeovers
Quickly adapt the end-stop for varying product sizes on a conveyor line, reducing downtime between runs.
Corrosion-Resistant Actuation
Utilize the SUS304 stainless steel rod in light manufacturing environments where moisture or contamination is a concern.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10 the Right Cylinder?
Choose this 40 mm bore when your application requires 628 N of push force at 0.5 MPa, which is a step up from the 32 mm bore's 402 N. The adjustable stroke is ideal for product-size changeovers on a line, allowing you to fine-tune the end position rather than swapping to a fixed-stroke SAI cylinder. Because the stroke is short, side-loading is minimal, but always ensure the M12x1.25 rod thread is properly aligned. This cylinder uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX50-10 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa, it delivers up to 128 kgf.
The rear adjuster allows you to shorten the nominal 50 mm stroke by up to 10 mm, creating a usable travel window of 40 to 50 mm. This stopper decelerates the travel end but does not lock the load without live air.
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