Questions tagged [bits]

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10
votes
8answers
4k 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
vote
2answers
82 views

Want to know how hex bit shank works and the history behind it's design

I have tried to search this in google but I haven't found a complete explanation, so I ask this here. I also have read other answers related with hex bit socket, but it still not satisfied. How the ...
0
votes
2answers
130 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 ...
0
votes
1answer
92 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 ...
0
votes
3answers
86 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 ...
3
votes
2answers
2k views

what drill bit size to pilot drill hole into stud for 15/64" lag bolt

Im trying to install a tv mount that has no instructions. Using my drill guage plate, 15/64" is the smallest hole these lag bolts can screw into. What size drill bit should I now use for pilot ...
1
vote
1answer
99 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. ...
2
votes
5answers
2k 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 ...
0
votes
1answer
44 views

Can I use Wiha “Micro Bit” bits with regular 1/8'' hex screwdriver?

Wiha says their micro bits are 4mm in diameter, and suggests to use special adapter for 1/4 screwdriver. Obviously these 4mm micro bits are smaller than 1/4 inch, but are they compatible with 1/8 hex ...
3
votes
2answers
348 views

3-prong tamper proof screw type?

Anyone know what bit would fit this? I have only seen the 2-prong spanner bits...
3
votes
8answers
3k 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 ...
6
votes
2answers
559 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, ...
1
vote
1answer
173 views

How do I adapt my spiral ratcheting screwdriver to use with all bits?

I have a spiral ratcheting screwdriver like the one shown below. I want to adapt it to use with all kinds of bits. This basically means putting a 1/4" hex socket on the other end. Fig.1. Yankee ...
0
votes
1answer
181 views

looking for hexlike-bit to unscrew bottom of ikea couch leg

We're trying to unscrew a leg from an Ikea couch (it's possibly the Stockholm model, not sure). The bolt on the inside looks hexlike, but all the hex bits we've tried doesn't seem to work. Can anyone ...
0
votes
3answers
97 views

Can a hammer concrete drill bit be used with a regular drill for a small project

I have to run a 1/2 inch pvc electrical conduit through a mortar joint The mfg calls for a 7/8 masonry bit to be used to allow the conduit through. Have not been able to find such a bit at the big ...
0
votes
2answers
431 views

Router bit suitable for straight cuts in pine 1/2" deep; Dutchman door patch

I'm replacing Mortise locks with contemporary levers on solid wood doors in my apartment. The doors are pine, 1 3/4" thick. I've removed the Mortise locks, leaving behind two large holes and the ...
0
votes
1answer
3k 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, ...
0
votes
1answer
361 views

Bit holder or hex chuck?

A novice DIY-er, I'm building out my arsenal of tools. One of the things that has been possible me is the bit holder vs the hex chuck. When buying bits, so far I've gone for the Irwin impact-ready ...
0
votes
1answer
114 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 ...
1
vote
3answers
6k views

How to drill a hole in plexiglass (acrylic sheet)?

What kind of bit should I use to drill a 1/2" hole into acrylic glass (plexiglass)? The local hardware store does not have a 1/2" hole saw - which was my first inclination. I am now considering these ...
1
vote
1answer
88 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 ...
0
votes
1answer
1k views

Is there an approximate substitute for a Torx T40 bit?

I needed a Torx T40 bit for a job, but that bit was missing from my toolbox. I didn't want to strip the bolts (they were fastened tightly over a decade ago), so I had to wait until I could get the ...