Hemingway Sensitive Knurling Tool Build - Part 2

Today we're continuing work on the Hemingway Sensitive Knurler kit. I've had my eye on this knurling tool ever since I first got my lathe, and now I'm finally building it. This is one of the classic British toolmaking kits, and building from someone else's design will be a new experience for me.

Tools used in this video:
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Licensed under Creative Commons: By Attribution 3.0 License

00:00 Intro
00:27 The 3D model
00:44 Notching the arms
04:09 Making the side plates
10:28 The distance piece and the tool holder
12:36 The knurl locking plates
18:00 Conclusion

[InheritanceMachining]

Every good shop needs a bin of shame 😉 Again seeing some very similar setups. Especially on the retaining clips. I also got a kick out of making such small yet detailed parts on the knee mill. The size difference is absurd! I'm interested to see your approach on the rotary table. Nice walkthrough as always!

[justus]

My grandfather used to have a full-size bridgeport style mill with a high speed spindle in his watchmaker shop. Was cool to see parts coming of it that could be measured in single digit grams

[Preso]

Nice work James. I'm very keen to see how you tackle the rotary table work. That's what keeps me awake at night! So many centres to find.

[chriscraven]

I made one of these about a year ago. I modified it a bit so that instead of the bar that fits in the QCTP I made a new QCTP block that the knurler bolted directly to. It gives a little more sideways support to the arms and stops them from drifting in opposite directions.

[cabletie]

Love the James a.k.a. "Joe Pie" itty bitty work!

[mumblbeebee]

An enjoyable half hour with James on a Sunday morning! Watching those tiny pieces emerge from your lathe so perfectly formed was great!
The British are so sweet, sticking to imperial measurements but using metric screws 😂

[spidermonk]

I need to make one of these, it looks so useful. Can’t wait for part 3!

[bernardwill]

I wish you and your family Merry Christmas and a Happy New Year.

[caseytailfly]

Great progress. I enjoyed the dramatic reenactment. I’d love to see a video on the different chucks you use on the mill and why. For example I saw you using an ER collet for some setups. Cheers!

[DavidLindes]

12:32 - sounds like something to make out of (1/8"? 1/16"?) sheet metal, with your brake and plasma table. :)

[TheAyrCaveShop]

Good One James! I'm really enjoying this build.. I suspect it's on most viewers "I want one list" mine as well. Great planning and milling on those small keepers..
ATB....Dean

[cygnet]

James your channel is great love watching you. Quality is excellent. If I may share a tip from a lifetime machinist that will improve your final outcome. When your squaring and generally side milling with an end-mill if you take a finish pass climbing you will get a much nicer final finish. Snug your locks just a touch. I usually use .003-.005 depending on material type. You don’t want the pass before to be real heavy maybe .020 or so then the finish pass in the climb direction. Leaves a nice final finish. Also helps with accuracy. Keep up the great content!

[ruperthartop]

Great video, thanks for sharing. Have a great Christmas and New Year, Cheers

[bdot]

Is there a reason you start with a plunge cut at 2:00 instead of just doing the entire cut with side milling?

[Chromevulcan]

That stuff machines like 12L14, it's got a bit of lead that really softens it up.

[Scottforyoutube]

James, I'm anticipating the next installment! I ordered one of these kits and started trying to model it in fusion based on pulling measurements off of another YouTubers video. You are right they are nice-looking drawings but the actual drawing is tough to figure out. I'm hung up on the arms on the knurling wheel end. I just can't get the hole in the right place to make the radii work. When I get the drawings I'll get a good picture of it and bring them into fusion and locate the hole that way!

[ChazzC]

Very Nice, James – I'm always amazed at what Joe Pie does on his full-size equipment when making tiny, functional machines.

You must be ecstatic: you have found a project that not only has mixed inch & metric dimensions/hardware (which as we have discussed before is something I almost always have in my designs), but also fractional inch drawings (which I have scattered among some of my dimensions as well), and I heard you say that you lowered the 1/4" end mill 1/32" to make the blades on the retainers.

I was hoping that my TouchDRO had the capability of displaying fractional inches and that I could wave that in front of your industrial quality DRO, but alas that is not the case. Not wanting to surrender quite that easily, I reached out to Yuriy to see if this was included in his new (V3) build (noting that it could be helpful to woodworkers as well), and although he didn't and does not have plans to do so, he reminded me that "it's very easy to enter them into the dimension preset. Most numeric entry fields accept simple equations, so you can just type "7/16" (without quotes) and TouchDRO will convert this to decimal." Perhaps this is also the case with your DRO?

[robertpearson]

A wall of shame is more useful than a bin, it keeps things out and visible as a reminder of what not to do again.

[xyzspec]

Yep, already cut the back of my hand with the tool several times. 🖐️😅

[Steviegtr]

It's good to see another way of doing things. Great video.
Regards.
Steve.