mechanics-dat/Alu_Extrusion-dat/2025-02-27-17-46-09.png
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mechanics-dat/Alu_Extrusion-dat/Alu_Extrusion-dat.md
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@@ -46,7 +46,18 @@ thickness version 1.0 mm, other versions include 1.5 mm, 0.8 mm
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![](2025-02-19-14-33-26.png)
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-## Profile Bracket
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+## Accessories
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+
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+| ALU Profile | T-nut Type | T-nut Size | Screw Type | Screw Size | Common Lengths |
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+| ----------- | ---------- | ---------- | ---------- | ---------- | ---------------------- |
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+| 1515 | T-nut | M5 | Bolt | M5 | 10mm, 20mm, 30mm |
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+| 2020 | T-nut | M5 | Bolt | M5 | 10mm, 20mm, 30mm |
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+| 4040 | T-nut | M6 | Bolt | M6 | 10mm, 20mm, 30mm, 40mm |
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+
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+If you want to use M3 screws with larger extrusions like 1515, 2020, or 4040, you would need to check if there are smaller T-nuts available for those profiles that are designed to accept M3 screws. Generally, M5 or M6 screws are more common in those sizes.
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+### Profile Bracket
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L-type
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-## Profile Angle == 角码
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+### Profile Angle == 角码
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type: 2020
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![](2025-02-19-13-49-22.png)
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-## T-nuts
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+### T-nuts
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single rail
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![](2025-02-26-19-27-32.png)
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+EU 30M4T == 304 == M4
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+![](2025-02-27-17-46-09.png)
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dual rail
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+#### Locking Effect Explained:
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+Tightening the Screw:
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+As you tighten the screw into the T-nut, the screw's threads engage with the internal threads of the T-nut.
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+When the screw is turned, it applies a force that presses the T-nut tightly against the sides of the aluminum extrusion's groove.
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+Increased Friction:
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+The horizontal part of the T-nut, the "T" portion, makes contact with the two sides of the groove. This creates a large contact area between the T-nut and the extrusion.
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+As the screw continues to tighten, the pressure between the T-nut and the groove increases, resulting in higher friction. The friction prevents the T-nut from moving within the groove.
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+Stability:
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+The tightening force from the screw effectively locks the T-nut into place. The T-nut's "T" shape, combined with the increased pressure, causes it to grip tightly inside the extrusion, which prevents it from shifting or loosening.
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+This means that once the screw is fully tightened, the T-nut is securely fixed within the extrusion, providing a stable and non-moving connection.
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+Prevention of Movement:
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+The combination of friction and compression ensures that the T-nut will not slide or move within the extrusion slot. It becomes firmly anchored, even under load, ensuring the connection stays intact over time.
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+In summary, the locking effect is the result of the screw creating a compressive force that increases friction between the T-nut and the aluminum extrusion groove, securing the T-nut in place and preventing it from shifting. This guarantees a strong, stable, and secure connection.
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+### Hex Head (Hexagonal Head):
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+- [[screws-dat]]
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+Description: A hexagonal-shaped head that requires a wrench or a socket driver for tightening.
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+Why it's preferred: The hex head provides a large surface area for torque, allowing you to apply more force to tighten the screw securely. This helps achieve a stronger locking effect for the T-nut.
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+Application: Suitable for heavy-duty applications where a high level of torque and secure fastening is required.
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## APP