From 432589acd8b56f881bd5006497a1dbb722a502a8 Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Sat, 23 Dec 2023 22:24:55 +0100
Subject: mech: pcb_case: Specify bolt as ISO 4762 M3x10

This bolt is a good starting point for most PCB cases.
---
 mech/pcb_case/bolt.scad | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'mech/pcb_case/bolt.scad')

diff --git a/mech/pcb_case/bolt.scad b/mech/pcb_case/bolt.scad
index 4fbd349..2ad348a 100644
--- a/mech/pcb_case/bolt.scad
+++ b/mech/pcb_case/bolt.scad
@@ -1,6 +1,13 @@
-bolt_d = 3;
-bolt_r = bolt_d / 2;
+// bolt based on ISO 4762 (https://www.fasteners.eu/us/standards/ISO/4762)
+bolt_k = 3;
+bolt_l = 10;
+bolt_dk = 5.5;
+bolt_ds = 3;
+bolt_ds_tol = 0.3;
 
 module bolt() {
-	cylinder(d=bolt_d,h=5);  // TODO height is not considered at the moment
+	union() {
+		cylinder(d=bolt_ds, h=bolt_l, $fn=30);
+		translate([0, 0, -bolt_ds]) cylinder(d=bolt_dk, h=bolt_ds, $fn=30);
+	}
 }
-- 
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