Grinding an HSS lathe tool blank for Micromark 7x14 mini lathe

[agwhitaker]

You have nice hands, but are we not supposed to see the tool you are sharpening ? 

[honeybunchickens]

nice work man

[Sawdoctor2]

First time ever I added a clip to Ytube ..... ( and yes, it involved some tricky tool grinding ) .... its a vid of my day job , slotting an internal spline . ...... Hhmmmmm, ..have a look at " Internal spline cutting " ..... large Butler 32" slotter .

[Sawdoctor2]

Hi , I've been a machinist for 38yrs, so I know how difficult off-hand tool grinding can be.

My apprentice years were with a microscope manufacturing company , where surface finish of all items was important. My "Tip "to finish off a radius forming tool is ..... turn up a short piece of soft material to Diameter required, leave it set in the lathe and add a coating of lapping paste, then run your roughed out tool bit up and down by hand ( with spindle running ) too polish in a perfect rad.

[saunixcomp]

@Sawdoctor2 great tip - thanks!

[HeadShot360IN]

3:35 - 3:58 was the best part of the video

[saunixcomp]

@HeadShot360IN Thanks! I'm glad you enjoyed those 23 seconds out of an eight minute video where I mistakenly had a bad camera angle. I would recommend you not watch any of my other 100+ videos on machining, nor any future ones, for fear of a future bad camera angle.

[saunixcomp]

@mykmykmykkk Never had a single complaint. It was a pre-war (e.g. pre-1940) building with solid walls. My noisiest piece of equipment was an air compressor, but it was a special quiet compressor.

[HITCHHIKERNAIEM]

WHAT KINDA METAL U CUTTTIND THERE ?? IT LOOKS LIKE ALUMINUM... BECAUSE UR CUTING WITH A HIGH SPEED

[Maurice1469]

Did you ever think to put your grinder on a bench

[saunixcomp]

@Maurice1469 No - do people put them on a bench? Of course I have... but this was when I ran my shop out of a Manhattan apartment. There was no such thing as room for a grinding bench.

[craveman85]

what if you used a hollow piece of steel for the ring. or bored out the piece your using and ground down a tool with a parting section on it. then you could mass produce.

[Dllshockk]

Yale student just died operating a lathe

[douro20]

A guy in my machining class who ran manual lathes for many years needed a tool to cut sharp radii in a piece of aluminum on a CNC shop lathe...he made the tool by hand.

[godmachine1000]

to make a perfect rad ,rough form on grinder as above ,then take a round piece of brass that is twice dia of rad about four inches long ,put it in the chuck of a piller drill , and lap using car valve lapping paste , mix paste with a little oil .and lap until you have a clean full rad.

[saunixcomp]

@godmachine1000 I like that idea a lot! Thanks for posting. I will have to give it a try.

[mectechman1]

Nicely done, good to see this old school methods in use. Not so common these days, might be that it's the preferred method by happy amateurs/hobbyist.

And you are right about learning and sharing, and very generous to do so from an amateurs level and view. Everybody learns to crawl before they walk. And it's impossible to fend off all these anonymous armchair experts behind their keyboards, don't take their critic seriously.

Thanks for sharing.

/mtm

[BoldUniverse]

Rank amateur!

[saunixcomp]

@BoldUniverse Yup! I am an amateur. But you know what? That's how people learn. I love machining as a hobby and enjoy sharing what I have learned with others.

[adisharr]

@BoldUniverse Professional douchebag!

[Srbija575]

Nice little ring you made there, good video. The tool that you made is called a "form tool", and this is not intended to be a criticism of your method, but if I were doing it, I would have made the same tool by putting a (small) cylindrical grinding stone in a Dremel tool and apply the lathe tool bit to the grinding bit at the correct angle. That would yield the circular or "crowned" form tool (as the old timer's would have called it) in the shortest possible time.

[fireicer]

what grinder are you using?

[jmar1371]

Place the tool on the table, and use a small block of wood behind it. More control, and easier on the fingers. If you have a mill, make a 7 degree wedge to make grinding the relief cut easier and more consistent.

[ZipSnipe]

Looks like you need to build ur self a bench!!!

[MASSEY4201]

do you add the chip breaker on to it

[saunixcomp]

Never have - nor really needed to.

[atvheads]

@MASSEY4201 Tilting the tool, or setting it above the center

is all thats needed. At least in soft materials sutch as aluminium.

[Axbent]

grinding dust must be kept away from machinery, its death to them in the long run!! For this job ud be better off to get a thinner wheel on a regualr bench grinder, dressing it to the req. shape. Or be a craftsman and file this ring to shape with a file...

[joshpgnut]

what was that piece of material you used to dress the wheel? I always use a star dresser.

[joshpgnut]

grinding your own bits by hand is such a pain in the ass. I learned how to do it but i prefer using a fixture. much faster and less mickey mouse BS

[saunixcomp]

Agreed - I'm in the process of making a fixture

[craynerd]

What is the ring mounted on and how is it fixed in position on the lathe? It looks like a wood but how does the lathe tool not just rip it off?

[saunixcomp]

The ring is being turned out of a piece of Aluminum 6061 tube. After I made all of my cuts to shape & size the ring, I parted it off from the aluminum tube.

[latheworks]

What's the material that you're cutting? Look like alu but I hope, for your sake, you're not going to make any banks out of Alu.

[saunixcomp]

It's aluminum, yes. I've since learned that it is toxic to humans, although it apparently it does not bother some folks. I am planning on either anodizing this aluminum ring or turning one out of steel just to be safe.

[latheworks]

do in stainless or titanium. Far better and its not toxic. It will be a bit more dif to machine but well worth it! Alum is way too soft and will not last a long time for a wed band!

[tryally]

An excellent video

Thank you for sharing with all

[togaida]

Niiiice, grinding cutting tools in the lotus position

[psfree40b]

There is a way to make a more actuate/ rounder cutter.

Using the lathe, turn a bar of copper to the diameter you want. Then smear on some valve grinding compound. The grit gets imbedded in the copper. Rough the cutter out on your grinder as you did, then finish on the copper bar in the lathe. This will give you a finer cutting edge that's less likely to dig in. Adding a rake at the top will help give you a stringier chip.

[happymark1805]

Unfortunaly the camera angle is 'wrong' The viewer can't see what you are doing, love your toolgrinder

[saunixcomp]

Yeah, I realized that my hand was in the way after I was done and it was already too late. Next time I'll change the camera positioning