[HBR] Uni Bit pricing : )

[Mike Hanz]

I long ago gave up on the Chinese products.  If you only drill a few 
holes in your lifetime, fine.  If you need more, then you learn to 
sharpen the bit cutting edge quite frequently, and the difference 
between true high speed steel and some of the Asian competition can be 
enormous.  Taiwan and Japanese products are outstanding.  It's the 
mainland stuff that is highly variable.

The enemy of the cutting edge is too much velocity for the particular 
material involved, and with the larger Unibits it can be a bit more 
critical, particularly if you are using a variable speed hand drill. 
They tend to go way over the speed that you intend for just a second or 
two...more than enough to fry the edge of the tool.  There are carefully 
and long established feed and speed rates for cutting tools and 
materials, but you can't follow them very well unless you have a milling 
machine or drill press where you can control some of the variables.  A 
decent coolant (some folks call it a lubricant, but that is not 
technically precise) is useful if you have more than a single hole to 
drill...WD-40 is excellent for aluminum (about the only thing it's good 
for, from my experience...:-) )

73,
Mike  KC4TOS

On 6/4/2012 5:31 PM, William Wood wrote:
> Sticker Shock today : )
> I finally broke down and bought my first UniBit
> I did not buy the cheapest, nor the most expensive
> bought one in between, thinking it's usage is not
> every day, but don't want junk left over after the first
> usage either : )  I already have a good nibbler, and
> had been looking for the punches, but those are
> not cheap ether : )  So think between the drills,
> unibit and nibbler I should be fairly well set for now.
> Still missing a couple of pieces so don't want to
> start quite yet, but am getting closer and closer : )
> 73
> Bill  KE9XW
>
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