Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100
The AirTAC SAIJ40X165-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 879N of push force at 0.7 MPa. By integrating a 100mm adjustment mechanism, this model transforms its 165mm nominal stroke into a highly versatile 65-165mm usable travel window, allowing precise end-position calibration during commissioning without external stops.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and pairs with PT tapered port threading (G1/4). The rear adjuster acts purely as a travel stop for deceleration alongside the standard air cushions, meaning it cannot hold a load without continuous air pressure. For applications requiring position holding, exploring the SAIL or BSAI series is recommended.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 165 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 SAIJ40BX165-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×165 | 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 SAIJ40BX165-100 Is Used
Product Changeover
Dial the end-stop back by up to 100mm to quickly adapt the 165mm stroke for different package sizes on a packaging line.
Commissioning Calibration
Fine-tune the retract end position during machine setup without swapping out the entire cylinder or adding external mechanical stops.
Variable End-Stop Positioning
Utilize the 65-165mm travel window to adjust pusher distances on the fly for sorting varying product dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-100 the Right Cylinder?
Selecting this 40mm bore makes sense when your application demands the 628N pull force at 0.5 MPa but requires on-the-fly stroke trimming to accommodate varying product sizes on a changeover line. If your force requirements are lower, stepping down to a 32mm bore provides 402N push force, while upgrading to a 50mm bore yields 982N. Because this SKU provides a massive 100mm adjustment window, it replaces the need to stock multiple fixed-stroke SAI cylinders for varying lengths. To replicate this setup exactly, match the 40mm bore, 165mm stroke, 100mm adjustment, PT port thread, SUS304 (B) rod material, and Basic/FA/LB mounting options (omitting FB/CA/CB/CR).
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 SAIJ40BX165-100 FAQ
The rear adjuster allows you to shorten the 165mm nominal stroke by up to 100mm, creating a usable travel window of 65-165mm. This lets you set the exact retract end-position during commissioning without changing the cylinder.
No, the rear adjuster functions only as a travel stop to set deceleration, not as a locking device. To hold a load securely without live air pressure, you would need an external rod lock or a different series like the SAIL or BSAI.
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