diff --git a/src/kiri/mode/cam/work/prepare.js b/src/kiri/mode/cam/work/prepare.js
index 288d3b9a..d54c2681 100644
--- a/src/kiri/mode/cam/work/prepare.js
+++ b/src/kiri/mode/cam/work/prepare.js
@@ -230,6 +230,7 @@ export async function prepare_one(widget, settings, print, firstPoint, update) {
         drillDown = down;
         drillLift = lift;
         drillDwell = dwell;
+        toolDiamMove = toolDiam * 1.1;
     }
 
     function emitDrills(polys) {