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You will, even if you take great pains to shield and protect everything you can. If you only do it once in a great while, and are anal about protecting the machine, you may never notice the

Jim, I updated the drawing to show the correct position of the eccentric. You may have to refresh your browser to get the new photo. Eccentric sketch. (

You can machine HSS. You need something harder than the HSS to machine it. Carbide & diamond come to mind. Some nitrides, too. Grinding is a machining process. Grab one of your HSS blanks, and look at

A U3 is all I have...?? good job I waited before rushing into the workshop and trashing things! Ah, presumably the aluminium oxide cutter is courser (what grit is it?) and more rapid cutting than

Indeed. I did not mean to say it is machinable on a unimat. If that was the intention, then the answer is no way jose. Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________

I have machined pre-hardened steel with a carbide cutter on a study CNC machine. To do anything like this you need something 1000x stronger than a Unimat. The simple answer is no you can't machine it.

Andrei,Have you ever done it?

You can still do it. I posted a video of a guy using his cnc and a carbide bit to machine an hss bit into a form tool. Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________

Andrei, The question was can you machine a HSS tool bit with an end mill. Not tool sreel. Dick -- http://www.homemadetools.net/ forum/ OFF- SET-tailstock-center-65965#post105972

Machining hss video https://youtu.be/rRkjVcmjhuc?si=2Plk76ImYj2FU8dG Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ Sent: Wednesday, September 11, 2024 8:41:56 AM To:

Peter, You can’t rough it a HSS tool bit using an end mill. Your best option is to grind it by hand on a bench grinder. I have two grinding wheels. One is a flaring cup aluminum oxide wheel 4”

Yes, you can machine tool steel using a carbide endmill. Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ Sent: Wednesday, September 11, 2024 8:09:12 AM To: Carl

It’s been a while since I’ve posted a dumb question (your view may differ!) so here is one… I don’t have a decent bench grinder, or, at least, it doesn’t have accurate guides*. I do have a

Just a couple of things to note. The eccentricity is not dimensioned on the drawing, but everything points to it being 10 mm, so a 20 mm throw. Also note the radial hole just visible in this picture:

Hi Gang: There are two risks as cutting speed goes up: 1) heat, the tool bit temperature will pass the tool steel's tempering point and will "burn" up the cutter. Carbide can cut red hot chips, High

Hi Keith: I have a SL that is great for the small jobs. I also have a Smithy Granite 13x24 that is better for the larger work. But the Unimat is the go to tool for drilling small holes and I have made

I would just say that the old DB/SL is pleasantly versatile in use, and I often returned to it with a sigh of relief after working with some of the other small lathes that are around. I now use a U3

I'd say the one on the left was done at a higher cutting speed. However, you are cutting hard brass, which is the easiest stuff to cut. In the comparison of machinability hard brass is the 100% that

Jim, Thank you for these.? Exactly what I was looking for. Jim

Here you go - along with a quick drawing https://www.doublemountainview.us/shopwork/unimat/eccentric/20240910_170549.jpg https://www.doublemountainview.us/shopwork/unimat/eccentric/20240910_170746.jpg