Drill bits

[Ol'fogasaurus]

Never seen anything like that before. If they did twist the material to get what is shown; if so I wonder just how strong it is going to be as looks like you are changing the direction of the grain.

http://www.youtube.com/watch?v=fYKm9fzA1D8

Couldn't find anything on making an easy out.

[Devastator]

Couldn't find anything on making an easy out.

I'm pretty sure he was joking.

[Ol'fogasaurus]

I'm not sure but I may have seen something like that years ago contrary to what I previously said. It is one of those little background things, in the back of my mind, that seeing a picture of it set off the where did I see it before or did I (but is not worth pettifogging over). If I did see one before it was a long time ago and probably was in one of those cheap tools bins you see in some stores. The fact that the reverse part of the drill bit is wider in diameter says that top of the bit would not have been of any use. It still bothers me if I did or if I didn't see it before. (grrrr)

[Devastator]

There are right hand cut/left hand spiral cutting tools available. Maybe that's what you're thinking of? There are also variable pitch cutting tools that could resemble that picture.

[Ol'fogasaurus]

There are right hand cut/left hand spiral cutting tools available. Maybe that's what you're thinking of? There are also variable pitch cutting tools that could resemble that picture.

No, I am somewhat familiar with those:

http://www.mig-welding.co.uk/forum/atta ... 1213726919[/img]

Fuser's URL had UK in it (...mig-welding.co.uk...). Like I said, I am pretty sure I have seen it before but I am not sure where or if it really was for an easy out. They do things differently in other places on the world so... I have used the square easy out bits and both right hand and left hand spiral easy out bits (all were tapered so they would dig in http://www.bing.com/images/search?q=eas ... &FORM=IGRE) but this one... I just don't remember the circumstances... yet.

I was looking at the English site and saw something allied that reminded me... it could be for removing soft metal tubes such as threaded nipples where you have to be careful with the threads being very close.

[Devastator]

I'm surprised that you have seen right hand cut tooling that has a left hand spiral to the cutting flutes. Most people don't believe they exist.

[Ol'fogasaurus]

I'm surprised that you have seen right hand cut tooling that has a left hand spiral to the cutting flutes. Most people don't believe they exist.

Maybe they don't, I don't know for sure (was the left hand spiral cut a bit smaller in dia than the right hand tooling? Remember, this was ~55 years ago.). My grandfather was some kind of a machinist in the Navy and ship yard (he retired and moved away about the time I was getting interested in cars) and so was one of the neighbors plus I knew several guys who either had or worked in machine shops. If I understood what you were saying ("understood" is the key word here) I think I probably saw it in their tool bins as some of them worked on specialty jobs; they all thought it was fun to show off their weird stuff and had me guess what it was for (most of the time it was a blank look on my part). The neighbor (on the other side of the cemetery I lived across the street from; he had a daughter about my age) was good about lending expensive measuring tools and explaining how to use them to me; not so much for the other guys on the block though.

Lee

[Devastator]

Here's what I'm referring to by L.H. spiral, L.H. cut.:
http://www.mscdirect.com/product/73215147

[Devastator]

This is a R.H. cut with a L.H. spiral.:

[Ol'fogasaurus]

Not what I thought you were taking about but I have seen two flute end mills before. When I bought my Smithy I looked at the two flute end mills but never got them as I thought the roughing end mills would be more useful. I did buy some end mills but had a heck of a time with them as I think my turning speed was too low. The mill snagged, broke the flute on the end mill and did something to the cross-slide so it now has a dead spot in it.

Not sure about the side the edge was on though.

I did not buy enough tooling to go with the Smithy as I didn't know what I needed. Don't use it much but it looks Purdy sitting there all covered up.

Lee

[SCOTTRODS]

I'm getting a Bench top Mill this weekend..... I may have to pick your brain for tooling to buy that is most useful.... I have a Full Machine shop at work to ask of, but none of the guys there use anything "bench top" and are not sure what I'll be able to do with it, so they aren't much help thus far....

Stay Tuned, Lee.....

[Ol'fogasaurus]

I'm probably not going to be of much help either. This was taken when my garage was fairly clean... I think I had just retired not too long before. Dev and some other talented guys on STF would probably be a better source for information to be honest assuming he has time with all the other stuff he does. "I had a dream..." (no insult to anyone intended but I did have a dream to make cool stuff); yeah... well so much for that dream!

I think you will be able to do a lot but in smaller scale. Measure, setup, measure, setup and when you think you have it right then do it again. You only get one chance per piece of metal usually. As I understand it, it is like painting... it is the prep that makes the difference.

[Devastator]

It's sort of difficult to see, but the endmill I posted has a spiral that forces the cut chips down, but cuts when turning clockwise.
It sounds like you stripped out part of the lead screw on your machine Lee. Should be fairly easy to replace.
I'd be happy to help anyone that asks.

[Ol'fogasaurus]

Thanks Dev: I can run the cross slide about half to three quarters across then it stops and won't move again until several turns and/or some pressure in the direction I want then it moves to the end of the run.

Scottrods, I also recommend getting a machinists hand book which will give you a lot of information including speeds for different materials. I still have to order one for myself.