Carbide Drills Durapoint

Toms Wheels · Mar 26, 2015

Trolling ebay found a bunch of Carbide tipped drills made by Durapoint. Among them is a seller with 65 lbs of these drills, unused, but calling them scrap. And priced at $1 lbs.

Anyone have experience with these drills , many very cheap on ebay, say they are usa made. The jobbers put almost solid carbide pricing on them.

I bought a couple to try, but would like to hear if anyone else has given them a go.

Kallam · Mar 27, 2015

I bought a couple of durapoint drills about a year ago .
a 1/4 and 5/16 screw drill carbide and talin coated .
They were about $50 each I wanted the best we were drilling
4140 pre hard . We have been doing this job for years no problems
the drills just don"t last to long with 4140 pht.

Well the 2 drills never did work.
They would not drill straight at all.
I took them to the person that does my cutter
grinding and asked him what wrong with them .
he said the both had about .0015 back taper
to them.The should have about .0002
back taper per inch .
Wasted about $100 thats what I think of Durapoint.

Toms Wheels · Mar 27, 2015

Thats the same reason I bought these. I'll see how they do tomorrow. I have not heard of "Back Taper". Need to find that as well.

(edit)Well It seems that the Back taper is not that different on the DP drills, this .4062" drill has 0025,with a flute of 4.75". The same size PTD has only a bit less at .0021 over 4.00" See if anyone else chimes in with thoughts. The DP is

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