Brings a new meaning to making chips, I’ve made taps myself and found you have to grind relief at the back of the teeth.

Hi Paul. You have gone where us mere mortals would never dare to tread. You continue to inspire me to be braver and to “go for it”. Good luck as you progress. 👏👏👍😀

Conventional milling is the opposite of climb milling. Nice video--you are very intrepid!

That potato was a novel approach 😂

Hi Paul, that was really very interesting and nerve racking. You did really well to capture this for us as well, the commentary as you went along was excellent. John Mills would have been proud of you and would have sent you off with a "bon apetit bonny lad" Look forward to seeing how you finish off the tap and test it Well done, have a great week!!

Another great Video Paul, very interesting. When you were about to grind the flutes on the mill I was yelling at the screen for you to put a jack under it and then you did! Glad to see you are enjoying the parting off blade, I've been using one similar to that for a while now, 2mm tip and parting off is now fun rather than nerve wracking

I'm usualy make bigger ACME screws and nuts but in my experience it is best to use hss tools grinded to two forms. One is like a parting of style and the other is with the same angle like an ACME but narrower. With the first one you cut to depth and with the second one you cut the sides to size, only cutting one side at a time. It's much lighter on the tools and the machines than a full form tool.

"Conventional" is what I was taught, milling the opposite of "Climb"

I usually run my potatoes under the tap 😂

Best I can come up with is a Tap Spud, but a tap spud is a plumbing term for a threaded spud fitting that secures / seals a tap to a bulkhead such as a sink. So a Spud does have an internal thread, but I've never seen an ACME version ;)

Paul….. 😱😱😱 This is like watching an Alfred Hitchcock film 🤣🤣🤣😆 Bloody nerve wracking ….. and I’m just the spectator 😎 I admire your determination…. and your problem solving methods. Regards Robert

Captivating stuff Paul. Your problem solving skills, ingenuity and ability to think outside of the conventional are as polished as they are entertaining. Now you have to name your tap "The Rooster" or something. Cheers, Jon

"Cross threading in a potato". Not a sentence I ever expected to hear. 😂😅😂😂 The last threading I did on the lathe, was to make a new plug and drain when we refurbished our original Victorian fireclay roll top bath. 1,1/2" BSPP in 316L shed 80 pipe. All the way through went OK, then set the threading dial on the wrong number for some reason on the finishing cuts. Managed to recover it, but broke the insert, cannot blame you for turning the camera off.

I think precut the threat with the boring bar and finish it with the tap is the way to go.That will work just fine.

Love the potato Paul 😂

I admire your tenacity and resolve. I have certainly had plenty of shop sessions where I end up thoroughly disheartened - but it's good to go back at it and overcome. I certainly appreciate your transparency in showing the whole process. Also I don't think people in general realize how much attention the filming can take away from trying to make the part. Cheers!

I am loving this project. So much to learn. I make 3D printed parts for wood lathe jigs. One attempt was a 3D printed adapter for the live centre with 1 1/4 x 8 tpi male thread on the OD and 3/4 x 10 tpi female thread on the inside. The threads are too sharp so I need to be chase, OD with a die and ID with a tap. The plastic is not strong enough to pull the 1 1/4in die along the thread. I did finally get the die on, but the thread was a bit cross threaded. A failure. I think Delrin would have had the same issues. It is the depth of the thread and so the large area being cut by the teeth, even though not taking much off. I have the same parting tool blade and inserts. This design works well - until the top part of the blade holding the insert moves for whatever reason and then the insert falls off. Easy to flip to the other end - until that end suffers a similar fate. I would get a spare blade to keep on hand. For an alternate test material I would have used a piece of hardwood. Since I do a lot of wood work, I have many different species of wood in my shop, some tighter grain and more dense than others. Threading into side grain works best for me. I have some wooden faceplates for the wood lathe. My 1 1/4 x 8 tpi tap was able to make nice threads in the side grain of walnut and mulberry for example. The ACME 5 tpi thread is a MUCH bigger challenge. As you said, so many nuances, cut the material, expel the chips, etc. When I machine 1 1/4 x 8 tpi threads on my metal lathe, my slowest speed is 60 rpm and the carriage feels to move much to fast for my liking. This is a reason I ponder upgrading to 3 phase motor and VFD to be able to get slower speed. I just am not eager to have to replace all the controls. I helped a friend do this on a couple of metal lathes so I appreciate the work involved. Looking forward to the next episode. Dave.

Good stuff. Although Delrin can machine beautifully, I've had brand new (sharp) shop-bought taps grab as sometimes the elasticity of the material means it moves out the way of the cutting edges rather than forming chips, so your experience doesn't come as a surprise. Perhaps using aluminium would work better? Looking forward to the next part...

Using a potato was genius! That is a trick I think I'll use again, very original! Learning from your experience I'd freeze it first though. Putting the potato back on the original and checking it's as firm would be a good idea.

Hi Paul, Very interesting to see the geometry in thread tap manufacture, I think you need to stock up on smaller ball end slot drills, but looks like it will work ( you did show the end result previously. Thanks for sharing

Always look forward to your videos, Paul.

good video paul

I know I’ve subscribed to your channel already.. but I just had to do it again for some odd reason. Just wanted to let you know. Also those double cut taps are complex and difficult to make. You are doing an excellent job at it. But acme taps as I understand them generate an enormous amount of pressure and heat when using them. Great video

Taking on a challenge Paul? You've got guts.

According to Professor Chaddock, no clearance is required on the outside diameter. The flutes can be ground to sharpen until too thin and break.

I too have messed up because of the interference factor of the camera! Riveting stuff, you have my undivided attention, you are certainly earning your engineers stripes with this one! Phil

You forgot the beef dripping cutting fluid with the potato.

Having just started working on a replacement block so I can remove the compound on my lathe with something more rigid, I completely understand where you’re coming from (including the potato!). You are in good company on feeling your way through these things. I worked on making some leveling feet for my lathe only to find a real flaw in my design, but that’s what keeps us going - failures teach us and we improve the design. So far your design looks great! I’m nowhere near so brave as you, putting my work on display (mine would bring far too many negative comments) but I really appreciate your willingness to share your adventures. Thanks for yet another great video!!! Looking forward to seeing how this plays out.

Your perseverance is admirable Paul! I have sent you an email for sticker swaps. Regards. Ade

I have a similar problem. I need a surface grinder for a pice of the surface grinder. The flutes on that tap would be extremely easy in the grinder. These pieces really test your patience (forget it, i’ll buy it). Also these pieces challenge you enough to think, research, learn and improve. Indeed the cost of this taper would be excessive if you try to make a profit. However, for a hobby fulfills multiple objectives: it’s entertaining, productive, educative, and cheap (only the cost of the materials). May I suggest to make a lathe plate for the divider’s chuck. My lathe is has an L-00 taper and I laso have a divider similar to yours.

Thx for the vid.

I'm a bit late with the making chips joke, but well done

I wasn't laughing because I used a potatoe, in the same way, with complete success, to measure the pitch I needed to be able to make a rack for the vertical feed in my Adcock & Shipley mill. I discovered the rack was missing after I bought the machine.

*Climb milling* or * conventional milling* That’s your choice sir. I try to conventional mill when roughing the work in and then light cuts with slightly higher rpm’s in climb milling to get the nice finish everyone buggers on about. 👍

If you cross thread that potato, you'll have had your chips. 😊

Is this where the terms "nutty" and "screwy" come from that are to describe people who are "challenged"? Is "Mr potato nut" the new "Mr potato head"?😂

хорошая идея с картошкой

Would potato be considered a self-lubricating material? Would it be proper to add butter, perhaps? p.s. It might be a speed/feed issue. Increase until you get those nice, golden-brown chips, and don't spare the butter!

If you had brought a tap what would you have learnt Nought !

whatever works for you mate, Iv'e stuffed bread in weeping pipes to solder them before today

next time i order chips, if they ask if i want salt i will say no thanks. i will have mine with acme!!!

Is the potato cooked or raw?

Not related to Videos, but will a new Haxby rail station be useful, or not?

I don't think you were really trying with the potato jokes. Something about chips, surely? Or at 36:00 "we're into the meat of it here"? 😂 Machining vegetables is very Doubleboost...