All Questions
17 questions
2
votes
2
answers
2k
views
What are the grooves on the shank of my 16" masonry drill bits for?
I had to purchase a new 16" masonry drill bit for a project I am working on and it has the below grooves on the shank. I am curious why, but also want to know if there is a special drill that it is ...
- 1
11
votes
9
answers
36k
views
How to drill holes in 3/8" thick steel plates?
I had to drill some 1/2" holes in 3/8" steel plates. In addition to taking something like 15 min per hole, a brand new drill bit lasts maybe two holes and it is trash.
What is the best way to drill ...
- 1
3
votes
2
answers
13k
views
What drill bit size to pilot drill hole into stud for 15/64" lag screw?
I'm trying to install a TV mount that has no instructions. Using my drill gauged plate, 15/64" is the smallest hole these lag screws can thread into.
What size drill bit should I now use for ...
- 149k
4
votes
1
answer
4k
views
Is it normal for drill bits to slip in a keyless chuck when binding in metal?
I'm trying to drill some 5-10mm holes in 1-1.5mm thick steel. I'm using a DeWalt DCD777 18V cordless drill with Bosch HSS bits (which claim they're made for drilling into metal). Both the drill and ...
- 11.1k
0
votes
4
answers
4k
views
What drill bit for what screw tap?
If I want to drill a hole for use with an M3 (or other metric size) do I need a special lookup table or do I simply use an M3 bit with an M3 tap?
- 25.3k
0
votes
3
answers
926
views
what kind of drill bits are these? Trying to drill through flat side of a fence T-Post
I'm trying to drill through 1/4" hard steel. the thicker bit went through relatively easily one time, but on the second go just spins. the thinner bit did not go far .. i think both need to be ...
- 8,351
3
votes
8
answers
9k
views
How to drill a 0.75" hole in metal
I'm trying to drill a 0.75" hole in a metal pole. I got a 0.75" drill bit from Home Depot (DEWALT 3/4 in. Black Oxide Reduced Shank Drill Bit) that I was told is appropriate for metal. I used a punch ...
- 11
14
votes
5
answers
25k
views
Masonry bits dulling after 3-4 holes
I'm using an 18v makita hammer drill with a 3/16" Bosch blue granite turbo concrete bit to drill 2" deep holes into concrete-filled cinder blocks. With a fresh bit, it takes about 15 seconds to drill ...
- 155
1
vote
2
answers
139
views
Trying to decide between these two types of masonry bits
I'm undecided if I need an SDS Max vs Plus for masonry drill bits. I've heard that drilling with SDS Plus can take a while with larger diameter bits. Anyone ever drill larger than 1" with an SDS Plus ...
- 66.5k
0
votes
1
answer
547
views
How to choose hole sizes when building a sorting sieve?
I'm planning to build a sorting sieve out of a set of plastic containers with holes drilled in the bottom. The container with the largest holes will be on top and the one with the smallest holes ...
CommunityBot
- 1
0
votes
3
answers
17k
views
How are mini drill bits mounted on a regular sized drill?
I have no prior knowledge of drilling but I've stripped a screw on one of my electronics so I need to drill it out to access the insides for a fix.
From basic research, I understand that the 'drill ...
1
vote
1
answer
198
views
Will a Bosch hammerdrill bit drill concrete faster than a cheap Makita bit?
I had to drill several 3/8" holes into very hard concrete. I purchased a Bosch LBH008 drill bit, but since I hadn't received it, I bought a cheaper $3.60 Makita drill bit that drills incredibly slow. ...
CommunityBot
- 1
2
votes
5
answers
20k
views
How best to drill pilot holes through hardened steel exterior door frame?
I'm trying to drill pilot holes through my exterior door frame in order to install a weather seal.
I purchased a few new cobalt drill bits labeled for hardened steel.
However, each new bit was ...
- 8,351
6
votes
2
answers
3k
views
Drilling 1/4" steel plate and concrete?
I need to drill (44) holes in (22) 1/4"-thick stainless steel plates. These are for 3"x3/8" heavy Duty Screw Anchors that will go through the plate and into the concrete.
My question is: if possible, ...
- 149k
0
votes
1
answer
5k
views
What set of bits is compatible with a Bosch Uneo (SDS-Quick)?
I've tried searching for at least an hour, but I'm finding very few resources and the compatibility situation is very confusing and frustrating. Most things seem to be compatible with SDS-Max/Plus, ...
CommunityBot
- 1
0
votes
1
answer
183
views
Are old spade bits worth sharpening?
I recently found an incomplete set of dull, rusty spade bits that belonged to my father. They are likely 40-45 years old. Are they worth trying to clean up and sharpen or should I just throw them ...
- 37.4k
1
vote
1
answer
144
views
Building a well-rounded set of bits
First and foremost, please my ignorance as I'm new to the whole DIY thing. I bought a cheap set of drill bits, munched through them like butter, and so have now decided to make the investment into a ...
- 743