Finishing the Hemingway Sensitive Knurling Tool - Part 6

[@jwest613]

The spring to keep the parallels in place, what a creative idea

[@rpavlik1]

Commenters on a recent Blondihacks video suggested using scraps of steel banding (left over from New Machine Day) as the springs, instead of traditional coil springs, but coil springs seem less terrifying to me.

[@kensherwin4544]

@@rpavlik1 In my experience, real springs tend to go "Sproioioioinggggg", never to be seen again. I think it happens when I can't find a shorter spring and over-squash the one I did find in the spring drawer. Flat springs from steel banding test to be more forgiving of being compressed too much

[@alexwbakker]

@@rpavlik1 I think this tip came from Joe Pie who has a great channel full of good tips like this.

[@Trainwreck1123]

I said this on the Inheritance Machining channel as well... I think it would be really cool to see you guys plus Blondiehacks and Artisan Makes all do the same project and link to each other's builds. Your individual styles are so cool to see!

[@JeffSearust]

I think I learned a ton just watching different approaches to the same problems

[@Thats_Mr_Random_Person_to_you]

This! It would have to be something that worked for the smaller machines of Artisan Makes and Blondiehacks, but I would 100% agree this is a great idea

[@leeopetersen]

Clough is where the minutiae is and minutiae, apparently, is machining. *I did have to look up how you spell 'minutiae.'

[@mrjibrhanjamalkhan2144]

Dumb

[@kmet2000]

Just to let you know - I gave you the thumbs up, the comment is here. Excelent build agan 👍👍👍

[@MijoMontego]

I have 0.1% of your talent, but just enjoy watching perfection. Well done!

[@outsidescrewball]

Great build along with the video production/discussion

[@markmcdonald4080]

I built the kit, my screw hardware was too long. The tool works great, thanks for sharing your build.

[@stevedavis9439]

Incredible work with tiny parts. I need some of those dental glasses!

[@HexenzirkelZuluhed]

Thank you for sharing! Interesting comparing your build to Inheritance Machining. But in the end both came out beautiful.

[@cooperised]

Don't forget Mark Presling's too!

[@James-wb1iq]

We've had trouble ordering screws in bulk this last year, and had to switch to a different type just to get stock. So maybe that's why you got long ones.

[@craigguinn5423]

Hi James, just got the kit this week. Todays project is penciling in decimal dimensions on the drawing for the DRO, with correct XY offsets. I have very similar tooling, so your approach was very helpful.

[@jasonh3109]

Great work and production as always. And I really appreciate the “hat tip” to Stefan. Good to give credit to those that came before us. Again, great content and beautifully presented. Keep ‘em coming good Sir. 👍🏾👍🏾

[@Clough42]

I learn a lot by watching Stefan, and I love his dry sense of humor.

[@cooperised]

@@Clough42 His creative use of English for humorous purposes is probably better than mine. And I'm English.

[@paulmorrey733]

Thanks James

[@RRINTHESHOP]

Nicely done James. All in all looks great and works well. 👍👍👍👍👍😊😊😊😊😊

[@joselrodriguez5999]

Loved this build! I enjoy your 3D printing and CAD videos but I most enjoy your machining videos as you are very gifted.

[@AmateurRedneckWorkshop]

That is a very nice knurling tool and you can be proud of your work. I won't go into the Tom Lipton method of calculating the size to be knurled but I always get a good knurl following that. Thanks for the video keep on keeping on.

[@bobvines00]

The Machinery's Handbook also covers how to determine diameters to match different sizes of knurling cutters/tools. Knowing Tom, but not remembering the video, he probably has a good simplified method.

[@danbreyfogle8486]

Very nice looking finished project.

[@Preso58]

I wondered about the 10 thou discrepancy between the arm thickness and the spacer block. It seems overly generous to allow for free movement. I made it to spec but there is always the option to tighten up the clearance. Nice looking build!

[@gerritvisser]

The Dorian Knurling catalog (Section H) has a lot of useful info and calculations for both form and cut knurling. For appearance I usually glass bead blast, gets rid of/hides a lot of marks.

[@theundergroundesd]

Good Job. Keep up the good work.

[@fladder1]

Great video as always, really loved this series. And remember: laziness leads to creativity and is therefore the engine of progress!

[@Steviegtr52]

Hi Clough. I found all the screws supplied fit ok. Not sure why yours did not. I have used the tool a lot lately on some other Hemingway projects & can confirm that it it is a very nice piece of kit. Regards. Steve.

[@floodo1]

classic series building a classic kit

[@chevytrucknick]

Great job with the build! I personally really enjoy the long builds, so much more details and techniques are conveyed which helps with my learning of the trade. I watched some other channels of the same build where they build it in one or two videos and so much of the process is lost and which makes it quite boring. So thanks for putting so much more effort into it. The only thing was I wanted to see some knurling on different diameters of stock.

[@joemcgarry1106]

Thanks James for another fine video. Your camera work, and narration, are second to none. The tool build came out great!

[@barrycaudle9926]

The way we used to close up holes a tad, for instance dowel holes or holes for punches in a punch plate. Place a hardened ball larger than the hole at its end, brass drift on top of the ball, good clout with a hammer. Repeat at other end if required. This tightens the hole at its end or ends.

[@transmitterguy478]

James, that is one heck of a gnarley knerler dude! Great job!

[@bulletproofpepper2]

Sweet! Thanks for sharing.

[@gregfeneis609]

Yay! Nice work, James!

[@midwestkustomz6350]

Hi James, another great video! I've been subscribed since I started my channel over a year ago and love watching your videos! I'm definitely gonna build me one of these or maybe even make my own. We'll see, either way love your content keep up the great work!

[@rpavlik1]

Looks nice! I have had surprisingly good foresight recently to do the whole "practice the process first" helping my youngest build their first pinewood derby car, yeah I surprised me too. It is a nice trick if you can remember it...

[@gregfeneis609]

4:20 Recommend using that spring on those parallels. No pressure, though

[@christianstark1055]

My screws were long as well. I am considering drilling out the threaded side plate on mine to pass the long screws through, and then threading the mounting block instead, instead of using the M5 screws to mount it to the side plate. The mounting block would hold the entire assembly together instead of just being a block to mount in a tool holder.

[@mikemarriam]

Great series. Thanks for sharing.

[@macsmachine]

Enjoyed the build. Thanks.

[@alexwbakker]

I'll vote for more long builds, too. BUT....Now I want to see you remake this whole thing on the CNCRP mill. This thing seems tailor made for CNC production.

[@Clough42]

I thought about scaling it up a little to use the larger knurl wheels more commonly available where I live.

[@MichaelLloyd]

Nice build. I enjoyed the series

[@emilr5815]

Another thought on parallel springs. If the gap was too small between parallels for the springsI would steel strapping from skids with a bend to get much closer. It was hard to see but yours looked close to bottoming. Really nice job on the knurler by the way. Be well.

[@Clough42]

I have a few different springs. Steel strapping also makes a great spring. Nearly everything I get these days seems to have nylon straps now, unfortunately.

[@mauserkk98]

The second version this week ,both worked in the end so win win .

[@MrRctintin]

Lovely job that, thanks for the great content in your videos. I’ve just ordered the Hemingway tool post grinder kit. Really looking forward to building it. My only issue is all the dimensions are in imperial, and I only use metric. I’m having to do my own CAD to convert everything in the drawings from fractional numbers to metric, so I can build it. It would be nice if Hemingway could provide updated plans so customers can choose to buy either inch or metric plans. I have also bought their broaching tool kit, and now want this knurling tool 😅

[@robertogrady1321]

Thats a nice little tool and nicely made. If you only had an internal knurling tool for those oversized brass bushing holes! 🤣 I don't mind the milled finish either. Some people are too fussy wanting all sides machined but each to their own. 👍

[@MarkW321]

Nice.

[@MrPieTer20]

I just realized that you and Inheritance Machinist was doing pretty same project. I was so confused before finding that out. Thought I had a deja vu or something :D

[@kemet-son]

it's super amazing 👌🏻❤️❤️❤️

[@billrotundo7814]

Great job!!!!!!

[@opieshomeshop]

Really good build. I'm nowhere near ready to attempt a build like this but when I am I need one that will be for a larger lathe. I've already got some ideas for changes to this tool. Hmm, I almost think this should have been a competition build between you and inheritance. 🤣😆

[@gbspikyfish]

Re 26:25 ; I've got an original Marlco knurler. I can just about get an 8 thou (0.2mm) feeler gauge between the top arm and the side of the body, so your 10 thou gap does look to be about "right" vs an original.

[@Clough42]

Yeah, I played around with feeler gauges, and it's right around .010" or maybe a little tighter, depending on the exact position of the arms and cam. Now that I've seen (and felt) it in action, I'd feel comfortable taking .005" off of that and leaving .003-.005" remaining.

[@mirosawsalom8659]

Nice job.I have knurling tool like Your.but I didnt make it.I had lucky and i found this tool ar flea market for about 20 dollars on Poland

[@TheUncleRuckus]

Turned out nice James! 👍👍 I do find it odd that the screws were oversized especially when the supplied material is all exactly on size. But I guess it's better to have them oversized rather than under LOL.

[@dermotkelly2971]

Great job! Well done. Have you ever thought of cold blueing it?

[@sylvaingervais247]

SUPER BIEN FAIS

[@copescale9599]

"Ask me how I know" haha Inheritance

[@Clough42]

That was recorded before I saw his videos. :)

[@J0nnyGT]

Really nice stuff. Thought you would have done some engraving on the side with your logo. Do you plan to tackle any more of the Hemingway Kits?

[@BenButler1]

Next video: How to get great knurling results

[@chrisstephens6673]

A nice build, what is your view of the Hemingway product and would you consider any of Kirk's other kits?

[@lindkvistandreas]

What a nice video!.. did you notice that in 24:12~ when using the reamer, you had a litle runout of the spindle/reamer (?) ?.. what would cause that you think? .. thank you for sharing this!

[@brandonwaterloo9432]

Another reason you don't want to let parts drop into the chip tray, or onto way covers, is that they can bounce into the path of chuck jaws and get launched. Ask me how I know...

[@chucksmalfus9623]

James, I’m shocked, an engineer of your caliber saying “one size under 3/16” how big is one size? I normally use a #14 drill bit (.182) to ream a 3/16 (.1875) hole. .. just jerking your chain as usual … keep doing you sir, I love all your videos 😊

[@Clough42]

Yeah, that's understandable. I just grabbed one drill to the left of the 3/16" in a standard 29-piece fractional set. :)

[@christinapalmer]

Perhaps a ball end for the cam lever? 😺

[@cherylduhon6448]

Great video. Very good info. I'm going to order the same kit today. I also watched Inheritance Machining's video on this kit and enjoyed both. I would like to know about how many hours labor did it take to do this kit. Thanks for sharing with us. Dan

[@Clough42]

I didn't keep track of my time, but it was significant. I probably spent three Saturdays in the shop, and a few evenings. That's not totally fair, though, because shooting a video slows things down significantly.

[@ralphpavero7760]

Great project I think I will try it BTW what laethe tool are u using

[@Niels_Dn]

Nice build! However I liked the surface finish of Inheritance Machining’s one better.

[@johnmcdyer7297]

I have a knurling tool almost identical to that it’s a Marlco I think

[@tonyshupe2334]

Do you have a video of making the double dial indicator holder?

[@Clough42]

Yup.

[@Ron-uq2hg]

I don’t understand why when drilling the shaft end you don’t use s Centre drill. Eliminates putting a finger close to a rotating part.

[@johnfriend240]

Not sure why they specify turning the screw knob down before knurling. I'd like it larger; if you're going to knurl it, you want larger for better torque application, even with the tommy bar!

[@Clough42]

You don't really need torque, since the clamping force comes from the cam lever. Having it smaller makes it spin faster and makes it quicker to get to size.

[@Alex_Taylor]

Does the kit come with two sets of knurling rollers? How do you get the crosshatch pattern?

[@Clough42]

They sell the diamond and straight knurl sets. I ordered both.

[@felistalangat3534]

Hey James, did you fix the motor on the els? What caused it to fail?

[@Clough42]

Haven't gotten around to putting it on yet. I tore the motor down, but didn't find anything obvious, and every component I suspected tested good, so I don't know.

[@rpavlik1]

So I've been trying to figure out what makes this the "Sensitive" knurling tool... Is it the cam action being more backdrivable than a screw so you can sense knurl wheel engagement and action? Or is "Sensitive" being used primarily as a euphemism for "Small"?

[@Clough42]

You can feel what the tool is doing through the lever. In practice you can feel when it is fully engaged and the gullets of the knurls fill up with raised material.

[@randyshoquist7726]

Well, that tool is way more complicated than it needs to be, but I kinda think that's the point. It does have interesting and elegant lines. On double-tracking, I find the reverse of what you (and Quinn) find. If you start lightly, a double track, even triple, can get established. But if you start aggressively, the pattern starts deeply enough that when the wheel begins its second lap around the part, it has a good chance of slipping across a slight mismatch and into the established pattern. Sometimes I'm just unlucky and it looks like crap anyway, but I'm generally more successful at avoiding double-tracking that way. Also, be sure that the wheels are well matched. If they differ by a few thou, one may track correctly while the other double tracks. That's especially true of diagonal knurls, resulting in asymmetrical diamonds. I'm interested to know if you find the cam a significant advantage. I could add that feature to my straddle type knurlers, but I'm not convinced that it would be worthwhile.

[@AdamMaszynotwor]

brawo!

[@VoidedWarranty]

what rpm are you using that edge finder at? yours kicks over way more than mine does

[@Clough42]

1000rpm.

[@MyLilMule]

It's a nice tool. But I think if I had your surface grinder, I'd surface grind all of those surfaces and get a nicer finish.

[@Clough42]

That would indeed produce a better finish. It would also require recalculating all of the dimensions for the turned parts, and I decided it wouldn't really make the tool work any better, so I didn't.

[@MyLilMule]

@@Clough42 All valid points. I do like it. Mill scale and all. ;)

[@dannirr]

Nice build. I've built their tailstock die holder. Was fun. Did you put anything on the steel to prevent rust?

[@rpavlik1]

He's mentioned in the past that he lives in the desert so rarely needs anti-rust treatment. But I think he mentioned earlier that many of the machined parts are stainless, and the rough sides of the stock also help.

[@matthewmiller6979]

Not 'lazy' it's 'economic effort'

[@adven999]

Hi James, I have the exact same kit that I'm yet to build. The screws also appear to be oversize, the M6 are 35mm, M5 are 20mm & the M3 are 10mm ! I was thinking of blueing mine, did you consider that?

[@Clough42]

I thought about it. I don't have any experience with blueing the mill finish. It would be really cool to do only some of the parts to get a two-tone look.

[@kasuha]

I can't help it but I think if you start with wrong diameter of the part it will always double-track no matter how easy you go in. Sure, it's not very likely to hit that wrong diameter exactly enough by chance but it's still a lottery so I think there's a point in using those calculators.

[@kevingrumbles2306]

What parting tool do you use? I'm in the market for a better one.

[@tonyray91]

I have recently started using in a flat blade that takes a GTN3 insert. On my 11l” swing lathe it works really well. I can now part up to about 1 3/4 in steel with no drama.

[@csours]

What is that old expression? The knurling nerd gets the worm (gear)

[@jurabondarchook2494]

Now imagine insensitive knurling tool. Tool that constantly criticize your knurling skills while you knurling. :)

[@markkrick8602]

I'm in the process of ripping off the design like many I'm guessing. Adam Savage also did a ripped version. When I saw the knurl wheel price from the kit maker I canceled my kit order

[@joopterwijn]

You make a bushing to fit over the top set screw handle f you want the give the to mor “body”

[@chameleon1956]

Does it break down and cry a lot