I have a 3/8 " drill. What size drill bits would work in that drill? Can I use a drill bit that is less than 3/8. Can I use a drill bit les than 3/8 up to 3/8. Would it work if I use a bigger drill bit like 1/2 inch?
What does it mean a drill si 3/8 is that measuring the circumfernce or diameter. Does 3/8 mean the maximum drill bit is 3/8

I got these drill bits in Germany. They are for three types of material: Wood, "Stein" (literally stone, meaning concrete and other hard materials), and plaster or sheetrock I think. But I don't know which is which. The HSS is light silver vs the black for the other two. The CV has a very sharp tip, which suggests the stone. There is plaster from previous uses on both the HSS and HM, but I guess even if you are drilling wood, you might start with plaster. or I made a mistake last time. I haven't used them in a decade and I've plumb forgot!

When I Google the acronyms, I at least get sites about drilling and cutting materials but I haven't managed to figure out what is what. (Acronym is the wrong word but I forget the right one)

Can anyone help?

I've got a Bosch PBH2200RE SDS+ heavy duty hammer drill.

Will normal SDS drill bits fit my SDS+ chuck?

There seems to be a good range of SDS drill bits available, but not so many SDS+.

I have got a conventional 1/2" chuck and key adaptor, but it's bulky and tedious to use (and defeats the purpose of having any form of SDS in the first place). It does allow me to use my older "normal" drills though.

I have a toolbox full of drill bits. How can I tell which ones are the carbide ones

Hi, I'm an occasional DIYer and use up certain drill bits (< 1/4") through breakage and dulling. I have a big boxed assortment of drill accessories, including things that will probably last a lifetime, but those smaller drill bits keep thinning out.
What do you usually do, do you buy individual bits to replace them, do you buy entire sets, or are there other bulk offerings? Any advice on brand?

Titanium bits are just coated, so if you sharpen them, they're not as good as new. Are cobalt bits the same way, or are they made of a homogeneous substance rather than being coated. I want some good metal drilling bits, but I won't invest in cobalt if I can't resharpen them w/ a Drill Doctor. Please give a reference, if you can, as well as any personal experience w/ good bits.
Well so far I've got one answer either way, but neither with a source to corroborate. At least I'm getting some other good info.

Drill Doctor may not be optimal, but I can't see myself trying to sharpen smaller bits manually with a grinder.

Have been struggling with my manual precision screwdriver in opening up laptop, DSLR etc. electronics

I now have 3 different sets of manual screwdriver sets so want to buy 1 cordless screwdriver set which could help me with opening up electronic stuff and with basic stuff around the house.

Any suggestions would be much appreciated...
Thanks Dookie - but would 7 Volt screwdriver not be harsh on delicate screws/body of DSLRs etc.?

i have to drill or bore a 1 3/16 inch round hole (yes i said a 1 and 3/16 inch round hole)2 inchs deep into hard steel.i can not cut it with a torch.i been looking for titanium drill bits that are 1 3/16 round or larger and i can't find any drill bits that size,that are made for drilling into hard steel.

i looked all over locally and online.but i don't know exactly what i should be looking for?or useing to drill thru the steel.
i need to bore a 1 3/16 hole into a 7 inch round 20 pound gear 2 inchs thick hard steel after that the gear needs to be welded to a 1 3/16 or 1 1/8 drive shaft.this part goes to a engine.i talked to some welding shop and thay might do the job.
also my step dad works for csx and he has bits the size i need,but there shop drill press is broke.
it's made out off hardend pressed steel i think. its just said on the gear and box hardend steel gear.the gear allready has a hole in the center 3/4" all the way thru but i need the hole to be bigger to fit on the drive shaft.

Not plated, like full titanium. Need both for drills bits and phillip bits. I tried dewalt brands for both and it seems like its plated. after the gold paint disappears it looks like regular bits.