Myford ML10 change Wheel question

[Brian WoodParticipant @brianwood45127]

Robin,

The 63 gear brings the translation to metric closer to the ideal of 127 teeth and your use of the 40 tooth gear is purely fortuitous in the answer it gives.

As you saw before, the 25/50 x 63/50 x leadscrew pitch gives a very close result for 2 mm pitch. Working with a very limited selection of change wheels will make things very limited for you

It is all of course your choice

Brian

[RobinParticipant @robin]

I am not sure about that, but I am not here to argue

I left it unattended on a slow feed once. The saddle pushed the headstock back until it snapped the bottom of the gear quadrant off and graunched the lead screw under the split nut. Seeing as how both results would stop the saddle I think it is most unfair that I had to suffer both. Anyway, since then I leave a slow feed gear set up and avoid thread cutting. Too much regret when I have to hold the pieces together whild locking the quadrant.

Perhaps I exaggerate, if I really cared I would drill and screw the quadrant it back together

[Brian WoodParticipant @brianwood45127]

Robin,

I'm sorry to hear of that disaster, I am surprised at your candour.

At my last place of work I saw the result of a few moments of inattention on a power fed drilling job through a stack of blanks.

The drill grabbed on break though and was forced through the jaws of the chuck where it continued on to burn through the soft back of the chuck into the hard Jacob taper arbour. Fortunately we saw the smoke and stopped the operation before serious damage could take place.

The drill was reduced in length by about 1.5 inches and the shank was by now at half diameter. Despite that, we were able to recover both the chuck and arbour and with a new drill carry on with the job

Your quadrant could be recovered by careful brazing of the broken pieces, it would be stronger than trying to fix it with small screws. 

Brian

Edited By Brian Wood on 31/10/2018 18:19:25

[RobinParticipant @robin]

Posted by Brian Wood on 31/10/2018 18:16:02:

Your quadrant could be recovered by careful brazing of the broken pieces, it would be stronger than trying to fix it with small screws.

We are not going to agree on anything, but I still like the way you think

Robin

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