Making A Knurling Tool For The Lathe

G'day everyone,

Fore the last project of the year I thought I might as well get around to doing a project that has been on my list for quite some time. And that is to make a new knurling tool. My old one is a bump style (or push type) knurler and whilst they are great for larger lathes, they do require quite a lot of force to use, and according to the machining zeitgeist, that is very bad for the spindle bearings.

The new style that I will make is a clamp style. It will use a screw to clamp the two pattern wheels on to the workpiece, which should save the spindle bearings. This seems to be quite similar to a scissor type knurl tool and I have no idea if there is an advantage to one type. All I know is the clamp style works and it works well. I hope you enjoy the video

Lathe - Hafco Al250g
Mill - Sieg x2.7l

#machining #diy #lathe

Timestamps
0:00 - Intro
2:17 - Making The Main Body
5:36 - Making The Roller Arms
12:25 - Making A M8 x 1.25 Left Hand Tap
18:54 - Making The Leadscrew
21:26 - Making The Roller Pins
23:38 - Making The Backplate
25:05 - Final Assembly and Testing

[ls]

Excellent job on the knurler! A couple of things:
- For the "perfect knurl" look, diameter of the stock is important to have a perfect pattern.
- As others have mentioned, the way you were using the knurler, still causes the work to deflect. Centering the knurl rolls with the work and clamping in, to the desired depth of pattern will produce better results.

Overall great job and Merry Christmas!

[trickies]

You can see the difference your stiffening process has made to the mill, spot on

[otterconnor]

Who needs a band saw when you have these 💪

[aqilsyah]

16:25 the greatest machinist that ever lived

[TalRohan]

I like very much that you always try and save material for other projects, the old argument that steel is cheap never stood up for me, especially now its not that cheap anymore and non ferrous never were cheap, but the carbon footprint of new steel has always made me very wary of buying new, I only use new when I don't have any or I can't make the size I need out of something else.
Good one
Very nice sturdy bit of kit, a real lathe saver ...I imagine better wheels would create a better pattern
Thanks for sharing and Happy holidays

[alankeith]

Wishing you and your family a Very Merry Christmas!!!

[criggie]

Suggestion - a big handle on top to turn the lead screw. You'll get immediate feedback through the hand and be able to increment the pressure gradually.

[smash]

So, the disadvantage of this type of knurling tool compared to a scissor type is you're limited in the maximum diameter by the stick out of your wheels from the main body. With a scissor type with properly bent arms, you can do much larger diameter knurls with standard sized wheels.

The trick to getting a good knurl is to put a lot of pressure on the wheels. That prevents double tracking. You also want to get the wheels to contact close to 180° from each other to prevent them from trying to spit out the part and putting all that side load on your spindle bearings.

Don't worry about doing diameter calculations based on the pitch of your knurl, the diameter is going to change as the wheels bite in anyway. It might matter for a really course pitch knurl like a rope knurl or dial engraving knruls, but not the standard stuff you have. Double tracking is just a sign of insufficient tool pressure.

[sapperjohn]

Thanks for all of these videos, you're a huge inspiration to me. This is my new favorite channel, im hooked!

[kenthesparky]

Another great tool made. Thanks for all this years conten, t looking forward to next years .Re Ken

[Lincoln-mr]

Imagination is more important than knowledge. For while knowledge defines all we currently know and understand, imagination points to all we might yet discover and create.

Great jog, Artisan. I'am starting with Lathes. My first one will arrive next week. I'm learning a lot with yours videos, Thank you.

[howder]

I just watch Inheritance Machining make an acme tap and it was hard to turn until he ground some relief on the leading teeth of the tap and hs simply did that with a Dremel type tool. (in case you. are interested)
All your parts came out beautifully and the final tool is a work of art. Enjoyed, Merry Christmas!

[msmith]

Good to see you using up even the gnarliest looking offcuts to make your projects!!

[BeemerBob]

Love all your videos. I hope you keep them coming.

[hersch_tool]

Clamp knurling for the WIN! Excellent work btw!

[LaraCroftCP]

It helps a lot when you cut or grind a relief on the threads.
Nice Job by the way👍

[stevehignett]

I'm so relieved!
Even 1 or 2 great YouTubers that I respect and admire (along with more than a few "orhers") jumped on the kit band wagon and it was so annoying.
Especially one (from my own country I'm ashamed to say), that's made a whole bunch of the kits.
All for promotion/free etc and it's frustrating!
Well done for originality!

[baddestmofoalive]

Using a cap head screw instead of rotary broaching or something else on the lead screw and shoulder bolts was such a simple and elegant solution I never would have thought of it lol

[AdamAugustPhoto]

10:08 good to see the old band saw getting some use 😂