Line Boring an Excavator Thumb on the Horizontal Boring Mill

Topper Machine LLC is always learning new things. This particular job is no exception. These parts are hydraulic grapple thumbs for Kubota mini excavators. When I ran these parts several months back, I had never line bored, and I had no idea where to start. So I built our own Line Boring Bar, and ground some HSS bits, and figured it out. Now you can learn from my setup how it was done. Watch as our 18 ton Lucas horizontal boring mill makes quick work of these 30 lb parts. Since this is only our second time doing a line bore job, I am still learning. So, if you see anything that is not right about our setup or process, feel free to point it out. Topper Machine LLC is an entirely manual machine shop located in Spooner, WI. Our videos will highlight some of our shop work as well as the sawmill we built in the shop and our A.D. Baker steam engine, and others we work on. Thank you for watching! Please Like, Subscribe, & Share. https://toppermachine.com Support our channel https://www.paypal.com/donate?hosted_... #machineshop #machinistlife #manualmachinist #incrediblemachine #instamachinist #lineboring #miniexcavator #excavator #boringmill