Mark J Posted June 1, 2021 Report Share Posted June 1, 2021 I use 6" long 1/8" drill bits often. I have been buying bits from True Value, but have been disappointed that these bits are frequently bowed. I just opened 3 brand new bits and they're all bowed at least a couple of mm. I need a better resource. Any suggestions? Quote Link to comment Share on other sites More sharing options...
Coop Posted June 1, 2021 Report Share Posted June 1, 2021 We use Champion Cutting Tool bits at work but just the opposite as we use the stubies for drilling thru stainless. Quote Link to comment Share on other sites More sharing options...
Mark J Posted June 1, 2021 Author Report Share Posted June 1, 2021 So when in doubt consult McMaster Carr. https://www.mcmaster.com/drill-bits/size~1-8/maximum-drilling-depth~5-5/maximum-drilling-depth~5-75/ By deduction I learned a lot. I need to drill holes as deep as 4 or 5 inches. Apparently to do that you need more than just a long drill bit (e.g. True Value), but one that is both long and has extended flutes. So McC is offering two bits, one uncoated HSS for $11+ and the other cobalt steel for $23+. Either way pretty "ouch" for a drill bit (and I don't know if the shafts are true which is the issue), but is the cobalt steel worth it? These bits are intended for drilling various metals; I'm drilling wood. Quote Link to comment Share on other sites More sharing options...
wtnhighlander Posted June 1, 2021 Report Share Posted June 1, 2021 It takes some effort to overheat regular drill steel in wood..The facier steels or coating won't make much difference, unless you follow some odd drilling practices. Quote Link to comment Share on other sites More sharing options...
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