Recent content by dan s

I think this place has the best prices I have seen on the net. http://www.onlinemetalsupply.com/ I think a lot of they list online are off cuts.

This is mine: http://www.dans-hobbies.com/2008/07/12/shop-made-dust-collector/ It's based on Phil Thein’s design.

these are what I use to hone my HSS & carbide tooling. http://www.woodcraft.com/family.aspx?familyid=4340

I personally don't, because IMO It's to difficult a task to perform on a manual grinder accurately. A copy of the Machinery's Handbook will have most normal & fine threads. However what your after is an ultra fine thread, and can be found here...

I don't know if they ship to CA or not, but you might try here: http://www.onlinemetalsupply.com/ Most of the stuff they sell is offcuts so it's cheap, but sometimes oddly sized. The will do cut to order if needed.

DIA is important depending on what type of knurl you are using, take a read through this thread. http://bbs.homeshopmachinist.net/showthread.php?t=30484&highlight=knurling+pitch

Stan, The first images I posted are of a HSS ground for threading. As I said in my first post a bit of that type will cut perfect threads, if it is feed into the work at 29.5 degrees. The reason it will, is because only the left side of the bit is doing the cutting.

I think the terms rake and chip breaker get abused, and I'm probably just as much to blame as anyone else. Take a look at following image. I just made it, it's suposed to be insert cross sections. the red insert - has no rake or chip breaker the green insert - has no rake but does have a chip...

Stan, I found the image I was looking for (make sure you exapnd it to full view). http://news.thomasnet.com/images/large/006/6025.jpg As you can see in the image it's a threading insert with rake on both sides. This can be accomplished with inserts, because they are molded. Unfortunately we...

I couldn't find a good picture of a threading insert, with rake on both sides. They can do it though because the inserts are molded (I have seen them before, ISCAR I belive), so they don't have to grind them, thus just about any shape is possible. take a look at these two inserts rake all the...

Not that I'm aware of most people, very the number of cuts and the depth of each cut, to keep cutting forces constant. In other words each cut is shallower than the last, because it is wider than the last. Sorry, I don't have any references. I did find these photos that might help...

I will be watching for this one. :bow:

The link I posted is mainly about carbide inserts that have it built in, thus the reason they don't mention rake. However the in feed angles will work regardless of cutter material. However

I pulled that one from my bookmarks, I have a good indexing scheme. :big:

ask and you will receive. ;D http://www.mmsonline.com/articles/threading-on-a-lathe.aspx In my eyes, the issue with going straight in with a flat top bit is that, it creates a lot of deflection forces, due to the size of the cutting edge.