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next-bolt

Sometimes you just need someone to hand you the next bolt. In OpenSCAD.

This library accepts a bolt kind (e.g. "M3") a length you need to cover (e.g., 36.5 mm), and returns the previous-sized, next-sized bolt lengths, and how deep to respectively, countersink or add clearance.

This allows you to keep your bolt lengths real-life-sized, without driving the design from the bolt size.

Anyway, check this out:

use <next-bolt/next-bolt.scad>;
echo(next_bolt("M3", 36.5));
// Echoes:
// [
//   ["next", [["length_clearance", 3.5], ["length", 40]]],
//   ["previous", [["length", 35], ["countersink", 1.5]]]
// ]

So for the aforementioned bolt and length, our choices are to either use a M3x40 bolt, and add 3.5 mm of bolt-sized clearance past the thing we're trying to reach with our bolt, or use a M3x35 bolt and countersink it by 1.5 mm.

examples/simple.scad demonstrates a this conundrum, with a nutcatch thrown in:

Previous Next
Previous bolt Next bolt

(The examples use catchnhole for convenience, but this library is absolutely agnostic about how you choose to (or not to!) render your bolts. You do you.)

Installation

Add a git submodule to your project:

git submodule add https://github.com/mmalecki/openscad-next-bolt next-bolt

Usage

use <next-bolt/next-bolt.scad>;

echo(next_bolt("M3", 36.5));

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