LumberJocks

Reply by crank49

  • Advertise with us

Posted on How do you identify good steel from bad in tools like drill bits

View crank49's profile

crank49

3343 posts in 1575 days


#1 posted 593 days ago

For what it’s worth, some folks on LJ make their own brad point bits from regular HSS bits.
It’s a great idea because a brad point bit ground from high speed steel will last about forever.

I think the Drill Doctor is a great idea. I wish I had one.
One other justification for one of these is that you usually only use a few bits from a set. If you go and buy replacements for the few that are dull you pay way more per bit than you would for a set.

I can sometimes get a bit sharp on the grinder, but it’s trial and error.

As far as knowing the quality of the steel, some of the better bits will be stamped with HSS to let you know they are high speed steel, the basic standard choice. If a bit has been used very long after it became dull and overheated (visable by discoloration) it will not be much good for anything. Most likely will not hold an edge if sharpened.

I like to buy Cobolt Steel bits in sets from places like HF or TSC. They hold up extremely well and are the very best for drilling stainless steel.

One way to test the hardness of the steel in a drill bit is to try to file the end of it with a cheap file. Good steel is harder than a cheap file and will round off the teeth on the file.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H


DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase