Re: Edelstall cutting tool system
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Re: the HF indexed carbide tooling, Can be used is not the same thing as will work well. ;) On the brazed carbide tools from HF, I had SO much trouble with them until I realized that the carbide chips on them were square edged, and the nominal cutting edge on the top corner didn't actually touch the work because the bottom corner stuck out farther. Supposedly you need a silicon carbide grinding wheel to grind them, and I had one, but the machine it was for didn't work anymore. Another rebuild project. Also, I didn't want to clog it up, since it was for a lapidary machine, so I tried my 6" grinder with Alox wheels. Worked decently, and I was able to get the tools to cut... But they're still crummy. And that was on a larger and stiffer lathe and a Unimat DB or SL. Have no experience with the larger Unimats. (Waaaahhhh!) Yet anyway.?
Did eventually learn to grind HSS, and while I still have (and occasionally use) carbide tooling, for most of what I do HSS is far superior on the smaller machines I have and use.?
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, June 11, 2024 at 12:20:46 PM CDT, pat goodyear <pgoodyear@...> wrote:
I have the Edselstaal tooling system, as well as the 6 tool set that came with the Unimat. I have used the tooling system and find it easy to use and maintain, I touch up the bits on a diamond stone.? ? I also have a few of the spare inserts, one is colored red and another gold, one is HSS and the other maybe carbon.? I also have the set of indexed bits from harbor freight, those work moderately well but not at low speed, as they tend to dig in and chip.? ?I have purchased inserts from a tooling place in Arkansas as well.? ?I purchased the mini-lathe bit set (carbide) both the long and short sets from harbor freight, I had to take them to work and use the machinists tool grinder to regrind the bits as they were all set up wrong.? ?Harbor Freight also has a set of 4mm carbide bits they are tiny and about 1.5 inches long, they work well.? I purchased from HF a set of diamond cutting disks with 1/4" arbors and I use the Unimat with the disks to sharpen the bits.? ?I find it almost as precise as using the tool grinder at work, but since I am now retired it will have to do.? I made a tool holder for the Unimat that supports 5/16 th bits although I don't use it much.? ?Boring bars, I use the Micro 100 that are on ebay, they work well. but one has to feed them gently or they will snap.? I find hand grinding is easy and it doesn't need to be perfect to work.? ?
Pat in OSOS?
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Bill in OKC too