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Hole saw drill bits. Another one bites the dust!

 

Catbuilder-- what exactly is happening --In my line of work I 've been using hole saws right up to 6 in. and seldom break a bit, say maybe 4 or 5 in the last 20yrs. There is a trick to it-- use longer reg. drill bits (grinding in the flat spot). This allows you to drill a deeper starting cent. hole before engaging the saw. Run your drill in reverse when first engaging the saw to establish a cutting grove to prevent spin out and breaking the bit. Also when cutting reverse your direction every now and then to clear the teeth along with removing the saw to clear the sawdust build up preventing binding.Don't apply too much pressure let the tool do the work as with all tools. Hope this 45/50yrs. of experience helps---Geo.

A yacht is not determined by the vessel but by the care and love of her owner--

 

Thanks, Geo!

That does help. I seem to break one every few hours of use. I'll try going in reverse to start the groove, since it's usually on the catch of starting the cut that I break one.

 

Forgot a couple of other tricks of the trade-- once a good cutting grove is obtained gently rock your drill in a circular motion while cutting but be gentle don't over do it this applys pressure on a smaller portion of the saw teeth thus increasing the cutting effect and reduces binding.The one drawback it will result in a slightly larger hole--a good thing if you're need an odd ball slightly larger diameter. The other trick you might try is setting your drill on the hammer position-I find for certain materials this creates fantastic cutting without binding. Keep in mind cutting fiberglass is hard on standard saw teeth dulling them with just a few holes, might think about carbide if this is the case.---Geo.

A yacht is not defined by the vessel but by the care and love of her owner--

 

Plus if you run your drill in reverse it puts electricity back into the grid and saves you money.

 

Not in Australia it doesn't-- I recall in addition to the toilets flushing counterclockwise your drill bits are manufactured and bore likewise

 

Mad Dog Morgan even rode his horse backwards!

 

let me see if I got this straight, if I got half of my tools from Oz and half from the US, my net energy use would be zero ?

 

Ya but you have to be mid Pacific to get the benifit and it's going to be hard to find tools made in North America, We only make the packaging boxes now. Speaking of tools how is the build coming along--

 

Yes, it's quite simple, you'll need a load of extension leads & will have to balance the use in regards to voltage difference, although the more I think about this the more my brain hertz.....

 

I am not sure that the rotational thing occurs so close to the equator so to have the effect, half the stuff will work say at 15degrees and more north and the other stuff will work beyond 15 south - BIG batteries may help?

 

That's why we are a day ahead of you Viking. The World goes much faster counterclockwise.

 

Christ thats a relief--I'm getting old fast enough as it is-- Yes there's another thing that really bugs me AGING.

 

Don't worry Viking, death halts the proccess.