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        Q: Drill bits: What is the difference between cobalt, titanium and tincoated drill bits?
A: The material you use depending on the surface you 're drilling . The pricing increased as the bits ' material gets harsher and more heating resilient .   The cheapest is Low Carbon Steel drill bits . Those are solely for softwood , and they dull faster nonetheless . Slightly better option open High Carbon Steel . HSS , which stood for High Speed Steel drill bits are a important improved and is feasible to used on hardwood and metals . They are the ones most usually utilized in household projects .   Titanium Coated Drill Bits are far more expensive and are significantly harder , because the coating is a hard ceramic material .   Then there exist Carbide Tipped Drill Bits . These are extremely hard , and don ’ t heating as quickly , but on the con side these people are fragile and could chip .   Cobalt bits are most usually utilized for stainless steel .   Diamond Drill Bits are in a league of its own right . They contain diamond particulate which makes them the harshest . Unlike other material , diamond drilling bits grind as opposite to cutting through . They 's use on glass , ceramics , stones , etc…   There are multiple charts online that outline material ’ s particulars . Here provides an example following website/drill-bits.blogspot.com/2008/04/drill-bits-material-from-carbon-steel.html   Hope this assistances .   Good luck . 

Q: 3 questions about drilling:?
A: Well I would n't ceverything it an art but there 's been one particular amount of skill required to operate a drilling motor . First , slow down , do n't be excessively anxious , if your drill/ driver has a variable speeding used it to your advantage . start your hole or screw slowly , with moderated pressure was later as the drilling or screw gets down into the material progressively apply greater pressure .  When drill soft materials , you are able use a higher speeding , for harder materials go slower and you are able need a lubricating .  when driving screws , at the very least for you , in the beginninging , always drill a pilot hole .  A pilot hole is a hole is a a hole slightly less than the general diameter of the screw members , about the sized of the main body of the screw . Thare allowing the body to go in comparatively easy and the threads to catch whatever material you 're screwing into .  I 'm guessing by your description the big holes in the weverybody is from the driver slipping off the screw and with you still pushing the driver bit goes into the wall .  Just slow down , take your times , in the knowledge how difficult and when to push will come with time and experience .  If your dill has an adjustable clutch , this situation is utilized for setting the screw differentent depths or torques .  If the screw does not go in all the way , and the clutch is slipping adapting the clutch to a higher numbers .  If after driving the screw members , it just spins , you have `` stripped '' it means ising that the thread part of the screw has made its ' own hole . Now the hole was just too big for the screw to hold himself in .  Your very bestest and easiest way learn lessons 's using a drilling would be to take a range of drill bits and screws and practice drill , and driving screws into a piece of soft pine wood .  try various sized holes/ screws , try stop them at certain depths , try halting when the screw is exactly `` flush '' with the surface .  After some practice you wili 'm finding that using the drill/driver is in fact easiest and much more quickly than any hand screwdriver . 

Q: Drill bit 3/8 question?
A: You can purchase drill bits that will fit in your drilling this thing works in wood up to 30 millimeters ( 1-3/16 '' ) diameter and is well known with different named . Drill bits everybody is made various , the majority are either otherwise known as a 1 ] Brad points ( wood from smeveryone to 1/4 '' ) 2 ] Spade Bits ( wood 1/4 '' to 3/4 '' ) , 3 ] Forstner bits , also otherwise known as Forstner flange bits or webfoot augers available in sized from 8 mm ( 5/16 '' ) to 50 mm ( 2 '' ) diameter .