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unibit

Assuming you are talking about the titanium nitrided ones , no. $44 dollars is a price from 28 years ago when they first came out . Now they have to compete with H-F imports which aren't that bad.
 
I never bought one personally. Some folks at work used them. The way I figured it, the smallest hole wore out first because it had to drill every hole and so on. I just bought drill indexes. Personal choice I guess.
 
I have a milwaukee set and an irwin set from rural king. No problem with either. They are excellent for drilling larger holes in sheet metal..
 
Don't know about the one you are looking at. friend came over to do some work and brought his HF bits. Had to put them away because and use my Greenlee ones that had drilled a lot of holes and were still cutting good.
 
A lot depends on how much you will be using them.

I bought a set of Irwins years ago, rather the company bought them.

They got used for the specific job I needed them for, then they mostly sat in the tool locker. I like the way they work, drill sheetmetal much better than a drill bit. But I would forget I even had them until I was through with the job, ended up leaving them behind.

Today I couldn't justify the price for good ones, just not enough need for them. I would probably take a chance on the $12 ones if for a special project.
 
The HF cheap ones might be good for wood working or sheet metal, but they will burn up doing more than that. I alos have the Irwin set and they are great, they cut rear well and start easy.
 

They're meant for sheet metal. Get into some tough steel and the Irwin ones dull and burn just like the HF jobs.
 
I did think about that.....once you wear out the starters, keep the bit around for the big holes.....makes sense. So, along those lines, what is the/your reasonable limit to material thickness for large holes, and how large?
 
about an eight inch thickness or so is about all i will use them on. they work nice on sheet aluminum, like siding too. hole saws just tear up thin stock. i just used one to drill out a fender washer to mount an ignition switch in my 240 utility. the new switch was a smaller diameter nut and the switch would pull right thru the dash. drilled out a bigger washer and wha-la!! good to go!!
 
(quoted from post at 12:15:01 11/15/16) People that are burning up tooling need to learn about speeds and feeds. Cutting lubes.
Click to expand...

People that are burning up tooling were using slow speed and good lube. What I was doing was trying to use a tool designed for thin, mild stock on heavy, tough stock. They just aren't meant for that. Their original purpose was sheet metal up to 12ga or so and that's where they perform best, not on 1/2
 
They wear pretty much the opposite usually because the larger ones are taking out more material each time around
 
I've actually had better results from the HF ones.
Tried Irwin unibit at work brand new and quite disappointed with it. The two flute design seems to work better. Fast work in sheet metal then bump it for deburring. When the Hf one dulls you can touch up the edge pretty easily. Irwin not worth the money imo. All from China.
 
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