Drill bits

[Kilo19]

Hey what do you guys use for drill bits.

Type is more of what I'm concerned with. Working on the jeep and of things metal I can burn them up, snap m in half, and sometimes melt the tip.

What has worked and what will stand up to moderate but not severe use.


Sent from my iPhone using Tapatalk

 

[Old Dog]

IMO stay away from the cheap ones and the TIN coated.
A good HSS or cobalt is what I use. A good lube and the proper rpm is also important.
Your best bet would be to buy them from someone like Mcmaster Carr.

 

[Kilo19]

When you say lube r u referring to like a cutting oil?

I've heard of the cobalt heat treated ones but find it hard to spend that much, but like my brother in law said, better to cry once, the first time and not later down the road.


Sent from my iPhone using Tapatalk

 

[tarry99]

Hey what do you guys use for drill bits.

Type is more of what I'm concerned with. Working on the jeep and of things metal I can burn them up, snap m in half, and sometimes melt the tip.

What has worked and what will stand up to moderate but not severe use.


Sent from my iPhone using Tapatalk

At a minimum most drill bits are made of HS or High Speed Steel. High Speed Steel Bits will have trouble going through most exotic metals especially stainless.
Taking care of drill bits is all about the proper turning speed, feed rate & lubrication.

 

[Old Dog]

Yes by lube I meant a cutting oil. And yes good drill bits aren't cheap.
Here's a page to where my work buys there's Holemaking from MSC/JL Metalworking Co.

Terrys right you need the right cutting speed and feed, which is hard to do with a hand drill.

 

[Kilo19]

Yea, tell that to the pieces of drill bits on the floor.
But buying 1expensive one is better then buying several cheap ones


Sent from my iPhone using Tapatalk

 

[Kilo19]

Yes by lube I meant a cutting oil. And yes good drill bits aren't cheap.
Here's a page to where my work buys there's Holemaking from MSC/JL Metalworking Co.

Terrys right you need the right cutting speed and feed, which is hard to do with a hand drill.

Thx for the link that's an awesome website.


Sent from my iPhone using Tapatalk

 

[rr41mag]

Drilll bits come in different grades. High speed steel is a waste of time in my opinion. Those "coated" bits are just a way to candy coat a high speed bit. CObalt and carbide bits are youur best bet. Most problems with drill bits are when yu start to drill the end gets broken off therefore it won't cut. Care must be taken not to break the tip when starting. Drilling steel you want to use heavy feed slow RPM's. Coolants help keep the chips from the cutting and help keep the bit cool.

Think of it this way. A high speed bit costs $3.00. A split tip cobalt cost $5.00 but lasts longer than 6 high speed bits. ?

 

[IOPort51]

Drill Doctor Sharpener, DD350X - Tools - Power Tool Accessories - Drill Sharpeners & Attachments


A dull bit is a dull bit, it is going to break/burn. Sharpening bits by hand is something that takes a lot of practice to get right but one of these will make life a lot easier.

I may have a few cobalt but the majority of my bits are HSS. I do a fair amount of drilling, mostly drill press but a fair bit of hand drilling, and I may buy two bits a year and usually because I lost one or need a weird size rather than broke one.

 

[tarry99]

Drill Doctor Sharpener, DD350X - Tools - Power Tool Accessories - Drill Sharpeners & Attachments


A dull bit is a dull bit, it is going to break/burn. Sharpening bits by hand is something that takes a lot of practice to get right but one of these will make life a lot easier.

I may have a few cobalt but the majority of my bits are HSS. I do a fair amount of drilling, mostly drill press but a fair bit of hand drilling, and I may buy two bits a year and usually because I lost one or need a weird size rather than broke one.

IO, your so right a dull bit will more than likely break and send some shrapnel into your fingers or eyes...........I also use a Drill Doctor for most of the drills except the exotic which I send out to sharpen.......I have my everyday drills in one cabinet near the drill press and then in another two drawers near the mill the nice HSS, Cobalt, carbide,Stub, Silver & Deming, in fractional, metric, numbered & lettered along with fixed and adjustable reamers for every project one can think of .........lots of tooling.

 

[Kilo19]

Wow. Thx guys.

Think I can borrow some, sometime.


Sent from my iPhone using Tapatalk

 

[IOPort51]

no way kid, you brake too many.

keep in mind that if you have to put a lot of force on a bit it is more than likely dull.

Wow. Thx guys.

Think I can borrow some, sometime.


Sent from my iPhone using Tapatalk

 

[Kilo19]

With that in mind does a drill doc really work or is it a flop?


Sent from my iPhone using Tapatalk

 

[tarry99]

With that in mind does a drill doc really work or is it a flop?


It absolutely works well as long as you pay attention to the set up and follow the instructions..........the one I have will take drills to 3/4" in diameter.
I will throw anything that is dull into a box and then some evening when I'm bored I'll sharpen drills for a few hours.

 

[IOPort51]

the easiest and most consistent way I have found yet. the 1/2" handles %99.999 of my drills. I would only recommend the 3/4 to a serious fabricator, like Terry 99. There are a lot of other things to spend money on, a drill press maybe. If you are not using a drill press there is no reason you should be using a drill larger than 1/2"

With that in mind does a drill doc really work or is it a flop?


Sent from my iPhone using Tapatalk

 

[Kilo19]

Yea most of my drilling is by hand. I may look into a couple of good bits and a sharpener

Thx again guys


Sent from my iPhone using Tapatalk

 

[PaRenegade]

I picked up a Drill Doctor for my Christmas present from the kids. (yes, for you young folks with babies, that's how it works) Lowe's had 2 of them, one on sale. They were the same model but one had an "X" added to it. They threw in a bonus folding lock blade knife and knocked $20 off of it!! go figure
I tried it last night and it works great. (yeah yeah, I'll wrap it up for under the tree. Drill bits couldn't wait till then)