Matching Non Nominal Metric Threads (Internal/External)

Continuing the series "Threading on an Import Lathe", this video will focus on matching a non-nominal metric thread. Links to other videos in this series below:
Part 4 - Matching Non-Nominal Imperial Threads
Part 5 - Metric Threading on Imperial Lathe

[testyourdesign]

Excellent demonstration. Joe Pie is full of Gems. Thanks for sharing.

[jamiebuckley]

hello lee ive got this saved on my favorits list on youtube and wrote it down on paper and watched this video 5 times and love the info you provide. it is PRICELESS the info you share totally priceless. you are one smart home hobist machinist as you call yourself wich i know from your kowlage and your videos your i definatly think your about 10 steps above that. thanks very much lee 4 your experience being shared and the time to do all theese time consuming videos. much appericiated .

[AmateurRedneckWorkshop]

Great instructional video as expected. I think you have about covered threading. Thanks for the video keep on keeping on.

[sierraspecialtyauto]

Nicely done. I think your depth calculation would have been spot on if you'd turned the shaft to about 0.004"/0.1mm under nominal as is usually recommended.

[RawSpeed]

Actually M24x1.5 is a std Metric Fine thread. The most common use for these 1.5 pitch threads are for electrical use, but can be used in many other applications. Machining Metric threads couldn't be more simple when using Metric machines and metric measuring system. Converting to Imperial would be like driving on the opposite side of a vehicle and reaching across to reach the steering wheel. I have grown up with both systems and Metric is by far the simpler, but I often revert back to Imperial at times. The 3 thou extra you took was largely due to the major diameter being about that much larger to start with (If calipers are to be believed).

[jamiebuckley]

exellent video lee this to me is very valuable information to know this. thanks for doing this series of videos.

[Bossmustangace]

Piece a cake!
(For you I mean) 😉

Seriously, great instruction.
Thank you.

[fristlsat]

Is that a spindle nut for a sealed bearing wheel hub? I know in the VW/Audi world some of those are a deformed fit lock nut, which might make measuring/fitting those a bit harder because the internal bore isn't quite round.

[goptools]

Hi Lee. Could you have left the cross slide where it was, at the end of a pass, and just reversed back out without backing the cross slide out? Would that have put stress on, or damaged the cutter? Just wondering. Also, that nut looks like it might be an axle nut from something. Thanks for the video!

[trollforge]

Just a thought Lee. Insread of tying a bag to the 1/2 nut lever, how difficult is it to unthread the 1/2 nut lever from ththe boss it turns?

[Gottenhimfella]

It is perplexing to me that Lee chooses to call something a "non nominal" thread, without even defining at the outset what he means by this made-up term.
At about 5:05 Lee finally gets around to saying he means a non-standard diameter for the pitch (in which case, here's an idea: why not call them "non standard pitch"?).
There are numerous standards for metric threads, and within some of those standards there is a variety of pitches for each diameter.
Lee doesn't say how many he's checked against, or which ones, in determining what is "non standard" ... Maybe he means a pitch not available on his quick-change box?

[rexmyers]

Now, if I could only figure how to get my lathe to run in reverse😢

[Quignal]

The math you show only works for 60° threads which is a metric thread angle and also UNC and UNF. if it were a Whitworth thread which has a 55° angle the simple rule won't work this is because the cos of 60° is 0.5 and the cos of 55° is 0.5735.