Lithium Ion Powered Drill
Posted: Feb 22, 2007 12:25 am
Over the past few months I have designed and built a high performance lithium ion battery pack for my rotary hammer drill that I use for dome climbing. Did some performance testing and it drills into limestone like crazy. When fully charged the battery is at 42 volts and it just tears into rock like mad. It could drill a 3/8ths 3 inch deep hole in 15 seconds flat!
The battery pack is fairly small and weighs only 3 pounds. It is 36 volts and 6.6 amp hours, with enough power to set 75-100 bolts on one charge (3/8ths 1-3/4").
The video is when the pack was half discharged and I had already
drilled about 40 holes (3/8ths 1-3/4"). I finally got tired of drilling holes and gave up. This lithium battery is unreal...
http://www.youtube.com/watch?v=KpPsH9-oVcQ
Applications include being able to instantly set bolts for rigging during cave rescues and drilling holes for rock shaving during patient extraction or just plain exploration. For rock shaving I calculated this battery has enough power to drill 14 feet of 5/16ths hole. That is about 28 shots worth.
The battery pack is fairly small and weighs only 3 pounds. It is 36 volts and 6.6 amp hours, with enough power to set 75-100 bolts on one charge (3/8ths 1-3/4").
The video is when the pack was half discharged and I had already
drilled about 40 holes (3/8ths 1-3/4"). I finally got tired of drilling holes and gave up. This lithium battery is unreal...
http://www.youtube.com/watch?v=KpPsH9-oVcQ
Applications include being able to instantly set bolts for rigging during cave rescues and drilling holes for rock shaving during patient extraction or just plain exploration. For rock shaving I calculated this battery has enough power to drill 14 feet of 5/16ths hole. That is about 28 shots worth.