Tool Talk

Blacksmith and Metal Working Forum => Blacksmith and Metalworking Forum => Topic started by: john k on April 08, 2014, 10:44:16 PM

Title: What is special about these
Post by: john k on April 08, 2014, 10:44:16 PM

yes,  drill bits, or (drills) if you go by the old catalogs.   There is a special use for these.    What is it?  Let the wild guesses run for a bit before the truth sayers have their say.

Title: Re: What is special about these
Post by: oldtools on April 08, 2014, 11:00:37 PM

Looks like my Silver & Deming drills for metal, with cut down shaft for 1/2" or 3/8" drill chuck

Title: Re: What is special about these
Post by: leg17 on April 08, 2014, 11:06:44 PM

Box looks like recent cheap Asian imports.

Title: Re: What is special about these
Post by: john k on April 09, 2014, 12:08:16 AM

These all are half inch shanks, with a flat ground on one side, to use in the old post drills.   Those that use a set screw to hold the drill bit.    They are an asian import, but over 30 years old, and cut steel just fine. 

Title: Re: What is special about these
Post by: scottg on April 09, 2014, 01:19:34 AM

 Never saw post drill bits this new. They must have been using them in remote parts of the world maybe?

   The early post drill bits are straight flute, not twisted.
      yours Scott

Title: Re: What is special about these
Post by: RWalters on April 10, 2014, 09:52:28 AM

Half inch shanks with a flat will fit a Cole drill as well.