Second part of the "how to drill" tutorial
History:
How to drill "part 2"
Drill bits of poor quality
They are usually of striking colors, gold and silver
Material hardness 10: Common drill bit
Material hardness 10: Drill bit of poor quality
Material hardness 10: Common drill bit
Material hardness 10: Drill bit of poor quality
Three problems present these drill bits: they break easily, burn easily and stick to the walls (like this one)
Which measure is ideal for a pre-hole?
13 mm hole test
without pre-hole
The ideal pre-hole would be 50% of the hole we are going to make
When to pre-drill?To what thickness of drill bit we begin to perform pre-hole?
My opinion is, start making pre-hole starting from 6.5 mm
Sharp drill bits incorrectly
They burn, they break and they hook
How to avoid hitching
1- when we notice the first sign of hitching
2 - slightly move the drill back
3 - accelerate the drill
4- just before contact with the area where it was hooked, Release the drill button and the inertia of drill rotation remove the material where it was hooked
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