404K views · 6.3K reactions | Here’s a good trick I picked up during my career of machining. Use a ruler between the workpiece and indicator to easily indicate over keyways, slots, grooves and better yet, threads! I have used this trick many times to indicate a threaded feature and over keyways. #abom79 #machinisttools #machinisttricks #starrett #dialindicator #lathework #machinisttools #manualmachining #manualmachinist | Abom79 | Facebook