Hah! I designed that kit, I'm so happy to see you make one! Here's the prototype in the video I made for Kirk: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tNoVN_XZFVk.html I made the instructions as clear as I could, I'm happy that they seem understandable.
I am glad you commented here - The design of the rotary broach is very elegant - And the fact that the plan is metric is very nice too :) Thanks for stoping by!
Entirely my pleasure. Yours is much more precisely made than mine. I've been thinking of posting some more videos of the little shop tools I make, I'll let you know when I do.
Really enjoy watching you run the little lathe. It's a testament to what you can accomplish without needing the biggest or most expensive equipment. Best wishes, Tom Z
Nice work as always. Just what I needed to see today too. You hitting that 10mm within 5 micron made me feel better about the 12 micron tolerances on the parts I ran today
The best of best ! Very nice video! You make very nice presentation of your work. Chears from Poland!! Bizon bial is one of the best industrial toolmakres!!!
Very nice work, as usual. I'm almost surprised that you haven't finished your lathe carriage flat enough that you can wring gauge blocks to it for setting your carriage stop. ;)
I am just beginning to learn the trade and I'm having a bear of a time staying consistent on the lathe. Got some good tips from this video, thanks Stefan.
Now that i have a new lathe i think its time to put it to the test on some of these kits! I like your tool post. Did you make it or is it commercially available
Stefan, I know this is an old video but I'm about to purchase one of these kits. When you ream the bored hole that the broach bit fits in, what do you do to remove the narrowing of the bore due to the taper on the end of the reamer?
I bought this kit. Stephen. On the thrust bearing it said that each race is different diameter. Which side does the larger one go? Maybe it says in the instructions and I haven't gotten that far yet. Thanks!
I almost wish that kit was available 3 yrs ago when I built my rotary broach. I just built mine from scratch and made the plan in my head. It turned out pretty well. The magic to making the rotary broach work is the 1 degrees bevel at the tail stock end. I made my rotary broach to accept the standard 1/2" shank rotary broach bits. It's a cool little device. The rotary broach is easier to make than the bits. The bits are fairly reasonable for purchase on ebay...probably not worth making unless you have a special profile in mind.
With the single lip cutter grinder I can whip out normal profiles with no undercuts in minutes out of a solid HSS blank :) I plan on designing a heavy duty version that will hold tooling with bigger shanks like 12mm..with a heavier set of bearings.
I don't have a cutter grinder, but I do have a surface grinder and an indexing head. I never thought about making the cutters out of hss blanks. I had been thinking about using tool steel and having to harden them after. I didn't want to be bothered with the hardening as I'm not really equipped for it. The hss blanks is a great idea. Thanks
Great video Stefan. Future project there. I just made a 12mm hex hole the hard way. Love how quiet your lathe is; VFD at play:) Btw, are they not called PH Horn, those small boring bars? Nice tools for small operations. Did you make the holder yourself? Thanks for sharing.
I like your carriage stop. I have been looking for I guess, a backwards micrometer head for years to make one like it. I could never tolerate the the numbers being backwards. It doesn’t really matter, but I would not be able to handle that.
Stefan, Your Lathe, if I couldn't have seen the bed ways in the video, I would have thought it was an HLV-H, I am enjoying this project of yours, Edmund...........Alberta
Stefan, whenever I drill holes on my lathe I tend to get large chips that slide up and stick to the sides of the flutes. How do I get them to slide off the drill/am I doing something wrong?
Do you lower the volume of the sections where you are machining on the lathe or is it really that quiet? If so, what lathe is that? I think I might need one...
I drop the volume by 20db, because in the early videos I blew out a few ears of my viewers ;) But apart from that it is quite low on noise, as it is all beltdriven. More about the lathe here: gtwr.de/shop/pro_mykrodreh/index.html
So, seeing you use compressed air without a sound probably answered that question for me... Still interested in knowing what lathe you have there though!
For this one, definetly. I think the largest full square I did with it was 6x6mm. You can go a bit larger if you predrill larger than the width of the square and just broach away the corners.
***** yep, it was a crappy import reamer in a crappy drill chuck, one of those 'just want to get it done' moments and it wasn't too critical, but it just goes to show how important run out is
