Old School Machinist Trick for Drills

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  1. Octane Workholding
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2 nuts and a drill shaft to check the tip angle, gotcha

ryangagnon
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I've never seen anyone would give a shit about drill bit angles like that as it's way more important to keep symmetry between shoulders or non-symmetry if there is a need to slightly increase a bore of the drilled hole. BTW you have to minimise the drill bit nose tip area by grinding off on the groove on each side as the nose tip practically doesn't cut anything.

MSM
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One thing I found on Ebay is from Nachi Drill point gauge... it was like $10. But has 8 different lead angles in 1 gauge

jimszabo
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Not to put too fine a point on it (pun intended) but you'll be 2° off this way.

DKNJ_
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That only works for giant drill bits Man when you got exotic drill bits or backwards drill bits it's a whole another fucking shit show I need to fix my eighth inch reverse drill bit. Fuck I don't know if I can hit that on the grinding wheel real quick

deadguy
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What did one nut say to the other nut? Let's stay together!

MB-zjer
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Очень распространённое заблуждение придавать слишком большое значение этому углу при вершине. Гораздо важнее заточить правильно задний угол, который для стали должен быть 12⁰. А угол при вершине для стали правильный 118⁰, а не 120⁰.

ИгорьБорисов-ид
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Or buy (or make) a fkn drill sharpening gauge for $20.

MtTaylorPaul
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Drills cant be sharpened. Drill bits, sure

gshvg
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2 degrees out std tip angle is 118 degrees. And totally wrong as this way does not check the cutting edge length ….

eamonnquinn
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Angles aren’t the same for every drill bit larger bits have shallow angles and smaller bits have steeper angles typically

Booney
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