Drill Bit sharpening jig

[Wilhelm]

Thanks! Cancelled the Amazon order and ordered your recommendation from Ebay.

Well, I hope the order works out this time around.

I just posted the above link so You have an idea what to get, I did not intend for You to buy that particular item.

I have a couple of those type dressers, I like them a lot.

 

[S&S_Work_Saws]

I grabbed about a 5/8" bit this evening that was beat to hell. After watching the first video I felt pretty confident I could get the hang of it. It's definitely going to take some practice but it's achievable I feel like. I tried watching the second video but he lost me. I think the key is going to be learning on the largest drill bits you have available and slowly working your way smaller and smaller.

 

[stretch5881]

Good to hear, it’s not that hard with a little hand and eye coordination, some practice it’s done , a magnifying glass light mounted in front of wheel helps to , if ur doing them frequently, especially small drills.

The magnifier is a good idea. I have one in my welding helmet but never thought about the grinder. Great idea.

 

[OnlyStihl]

I grabbed about a 5/8" bit this evening that was beat to hell. After watching the first video I felt pretty confident I could get the hang of it. It's definitely going to take some practice but it's achievable I feel like. I tried watching the second video but he lost me. I think the key is going to be learning on the largest drill bits you have available and slowly working your way smaller and smaller.

In the videos they can sharpen in a minute or less. Beginners, like me, take a whole 2 minutes. I don't know what a 5/8 bit cost but I'm sure it is well worth 2 minutes of my time.

 

[OnlyStihl]

Yikes! ~$18

DIY Drill Bit sharpening

 

[Squareground3691]

The magnifier is a good idea. I have one in my welding helmet but never thought about the grinder. Great idea.

I’m a tool & die maker , we have them on all our bench grinders, it’s a must for small drills especially like 1/8 and smaller to sharpen correctly,

 

[Wilhelm]

My left eye is my magnifying glass, my right one not so much.

Take a new mid sized drill bit, take a good look at the cutters contours, try mimicking a grinding process by following those contours on Your bench grinder wheels surface with the grinder off.
When You feel confident turn the grinder on and repeat.
That is how I thought myself how to grind drill bits.
I developed a tendency to grind a shallow point with a lot of relief.

 

[Rich Fife]

When I was in my early 20s, I learned a larger grinding wheel made for easier sharpening by hand. I was also told to set the drill against the wheel, (while not running)... rotate and dip the rear of the drill until you feel confident that you can follow contour... it took a few tries but it helped me learn faster. There is a sense of pride when you start drilling and the chips are equal on both flutes...
I see a lot of guys never measuring the cutting lip length and then they're wonder why their chips are different lengths.

 

[Wilhelm]

....
I see a lot of guys never measuring the cutting lip length and then they're wonder why their chips are different lengths.

I never "measure" my drill bits cutters other than eyeballing them.

 

[Wilhelm]

Some of my grinds, bottom one is factory ground/new.
Top to bottom: 20.5mm, 16.0mm, 13.5mm, 12.5mm twice

 

[Rich Fife]

I never "measure" my drill bits cutters other than eyeballing them.

I'm a stickler with the length of the cutting lips... mainly because if they're equal, one side isn't digging in harder than the other and with equal lengths/geometry one should have a tighter hole. I drilled T6 6061 with a 1" bit, 4" deep with both lips being equal and the hole ranged from 1.0005" to 1.001"... the largest area being where the drill first started touching the cutting edges... lathe was spinning at 1200rpms. Had one edge been longer it would've cut bigger... obviously if one side is dramatically larger than the other the hole size will be bigger yet.

 

[Wilhelm]

I think You are using too high rpm's for a 1" OD drill bit, even though it is aluminum.
Just saying.

 

[Rich Fife]

I think You are using too high rpm's for a 1" OD drill bit, even though it is aluminum.
Just saying.

That was my original thoughts when i first "learned" 'how to machine'... the old timers in the shipyard said, no coolant, no cutting oil, speed it up and with a proper drill feed it like no other... they showed me, and from that point on, I've been doing it without any issues. Trick is to feed it fast enough to have uniformed chips but more importantly, feed it fast enough to where the heat doesn't build and create galling etc...
These holes are tight tolerance. They're tight enough to where a 1" ground dowel have resistance from the trapped air.
For $h!t$ and giggles, I'll make a video and show you, if you'd like. Lol.