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George Ezell, bladesmith" How much useful knowledge is lost by the scattered forms in which it is ushered to the world! How many solitary students spend half their lives in making discoveries which had been perfected a century before their time, for want of a condensed exhibition of what is known."Buffonview some of my work

If you decide to get carbides, I would recommend that you get straight fluted bits. They are much more durable than the twisted ones.

Countersink that can perform chamfering of round holes, mounting surfaces of small screws and bolts, and grooves. Features · It has multiple flutes and is ideal ...

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... 2-in High-speed Steel Taper Shank Twist Drill Bit at Lowe's.com. Pre-drill perfectly centered holes for proper alignment with this 3 piece hinge bit set.

I have used this afternoon a carbide drill bit to enlarge a hole in the tang of a hardened stainless steel kitchen knife. They work very well for about everything!

Tangs should never be hard, not in my experience anyway. The softer the tang the less likely it is to crack or shatter during hard use. If your tangs are hard you may want to look into your heat treat and tempering.

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Thanks GEzell, I think that pretty much answered it, I've got the steps to drilling holes down years ago in machining class, but I think the main problem was the cutting speed and the lack of cooling fluid. I had just gotten the drill press and was excited about it and started playing with it on the setting it came in, which was the middle setting, but I had already worn out the bit before I realized to change it to the slowest setting. Plus I only dipped the bit in oil once before starting. The steels I was drilling at the time were o1 and 1095. I got another of the cobalt bits to try angain yesterday but this time I'm just going to take it slower and easier and see where that gets me. If that still goes dull too fast I'm just going to have to order some carbide ones, I just hate ordering things. Thanks for the advise fellas!

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If your chipping off the tips of your edge and breaking bits your probably trying to drill to fast. If they are dulling up then you may need to work harder to keep the bit cool.

Oct 8, 2020 — We recommend that you choose either a cobalt drill bit or carbide drill bit for stainless steel hole making. These high-quality and hard-wearing ...

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Speed and Feed Calculator for Drilling and Milling,easyspeedsandfeeds.com is the easiest speeds and feed cacuator to use.

You may want to go over and hang out at somebodies shop and see if your missing a step in the process as its pretty hard to guess about without watching you work.

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CAM Tool Libraries ... Run FASTER. Push HARDER. Machine SMARTER. Machining Advisor Pro.

The best hard plastic cutting tools are a saw or a piece of string, depending on the size, direction, and precision of the cut.

You could always put the blade in water and soften the tang with a torch, but might not be doable depending on your goal.

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O1 may be the worst steel to drill that I've experienced, 5160 and L6 are not much better. If you're going to be using these steels on a regular basis, carbide bits might be a good investment. Go slow and light, and use lots of cutting fluid.

Engineered tool coatings are at the core of our commitment to enhancing cutting tools. We focus on delivering superior coating solutions that elevate tool ...

Are you using a drill Press? I have used off the shelf High Speed Steel bits to drill steels like D2 and all manor of stainless steel including ATS34 so you shouldn't be having any problems with Carbon Steel.

Something else that works for me when you get the hole started then it stops cutting. Make a small punch with a 4-sided point, and punch inside the hole with it. for some reason, it helps the bit grab better, enough to finish the hole...

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Going back and reading your original post, you may want to find yourself a good drill bit sharpener. There are a few real good ones I have seen lately come onto the market.

I asked a similar question years ago, and was informed I needed to learn to sharpen drill bits... For 1/8th inch and up, its not that difficult, anything smaller it tough to get right. Also, it sounds like your steel is still somewhat hard. If a standard anneal doesn't do the job, try a sub-critical anneal. Basically you heat it up to just under critical, hold for a minute, then let it cool. It amounts to a very high tempering cycle, and is really good for L6, o1, and other deep-hardening steels that tend to air harden in thin sections.

Jul 15, 2022 — Insert Designation Chart - provides ANSI and ISO designation code definitions for carbide insert shapes, relief angles, tolerances, chipbreaker ...

I've tried about everything I can find locally and just can't get a drill bit that will cut through tangs and whatnot very efficiently or at all. I finally got a drill press which helped a lot, also found a cobalt bit near here and with the 2 I was finally able to drill a couple of holes for pins in some of the knives I'm working on and then it just stopped, can't get it to cut for crap anymore and I thought I was finally on a roll. I've heard carbide bits will do the trick but I can only find them for masonry. Any help would be greatly appreciated.

0.5mm Corner Radius, 1.5mm Tip Diameter, 4mm Plain Shank, 50mm Long, 4 Flutes AlTiN Coated Micro-grain Carbide. Suitable for Steel, Cast Iron and General Use ...