61-80 drill bits

[Geartooth]

Does anyone have a suggestion as to where I can obtain quality miniature drill bits? I have purchased a few sets of #61-80 drill bits and am constantly disappointed with the way they are ground. Close inspection shows they couldn't possibly cut metal.

Greg G.

 

[gbritnell]

Hi Greg,
All I can say is purchase quality drills like Huot or similar. All of the import ones I have ever bought are just plain junk.
gbritnell

 

[canadianhorsepower]

Does anyone have a suggestion as to where I can obtain quality miniature drill bits? I have purchased a few sets of #61-80 drill bits and am constantly disappointed with the way they are ground. Close inspection shows they couldn't possibly cut metal.

Greg G.

here is the link where I got mine very satisfied

http://www.mscdirect.com/industrialtools/carbon-steel-drill-bit-set.html

much cheaper
http://www.jewelerstoystore.com/DORMER_HIGH_SPEED_DRILLS_SET_p/d91.htm

another link/ are good but not like the dormer

http://www.micromark.com/20-piece-drill-bit-set-41-60,8183.html

 

[gbritnell]

I did some looking around and there are some Huot sets on Ebay. The Dormer set might be pretty good but I can't see where they justify that kind of money.
gbritnell

 

[BobsModels]

Hi

I have been purchasing PTD. When you see them compared to others under a microscope they are really nice.

I have been getting them whenever ENCO has a 25% or a rare 30% off. They are made in France and are expensive.

http://www.use-enco.com/CGI/INPDFF?PMPAGE=2&PMCTLG=00

BTW That Dormer set is cheaper on Amazon, I have found that eBay is often higher than Amazon.
http://www.amazon.com/dp/B005O1DWYG/?tag=skimlinks_replacement-20


Bob

 

[Dalee]

I did some looking around and there are some Huot sets on Ebay. The Dormer set might be pretty good but I can't see where they justify that kind of money.
gbritnell

Hi,

Dormer is insanely expensive - and worth every penny after you've tried them.

I can give a general thumbs up for PTD drills. Haven't used them that small, but the fractional sizes are nice.

Dalee

 

[abby]

Be careful when buying branded drills especially from Ebay , many of the "better" names sold cheaper are not the real thing. The practice of forging western products has been going on for many years but is now so bad that even prescription drugs are being forged.

 

[kvom]

The problem with small drills on Enco is that you have to order 12.

 

[Charles Lamont]

You could make your own drill sharpening tool:

http://www.homemodelenginemachinist.com/showthread.php?t=22883

Four-facet drill points produced on this thing are a revelation.

 

[BobsModels]

Charles

Is there a current source for the drawings for that sharpening jig?

Bob

 

[Wizard69]

You could try companies like: https://www.drillbitcity.com that resharpen drill bits used in the electronics industry. The bad part is that they are carbide designed for PCB drilling. How they would work on other materials is unknown. Sizes are limited too.

Other wise you need to check out the big vendors supplying machinist. It may also be worth looking at vendors marketing to clock and watch makers.

 

[Charles Lamont]

Charles

Is there a current source for the drawings for that sharpening jig?

Bob

They are in this book:

http://www.teepublishing.co.uk/book...injectors/miniature-injectors-inside-and-out/

I don't know of any other source.

 

[Geartooth]

Thanks for all the suggestions. I will add to my purchase list and wait for sales.

 

[cwelkie]

You might find enough information here:

http://www.gadgetbuilder.com/DrillSharp.html#Four_Facet

... to build a small drill sharpener along the same lines as the D. Brown design.

Charlie

 

[BobsModels]

Thanks for the links to sharpeners

Bob

 

[canadianhorsepower]

Thanks for the links to sharpeners

Bob

you might like this one

http://modelenginenews.org/meng/smalldrilljig.html