Metric to imperial

[John HaineParticipant @johnhaine32865]

Many metric lathes calibrate the X slide dial in diameter not radius…

[JasonBModerator @jasonb]

It would be interesting to know what if any different lengths the division lines are and what if any numbers are on the handwheel as that may make it very easy to put on say a 0.3 cut if every 4th div is marked/longer and then it's just 2 and a bit divisions for the remainder.

Also what is the leadscrew pitch 2mm, 2.5mm or something else.

Or it may be better to treat each div as 0.05mm and work in diameter rather than radius

[Anonymous]

Posted by John Haine on 06/01/2021 10:58:26:

Many metric lathes calibrate the X slide dial in diameter not radius…

So does my imperial lathe.

Andrew

[Nicholas FarrParticipant @nicholasfarr14254]

Hi, well I just do it the easy way, I use a calculator and I'm not ashamed to say so.

Regards Nick.

[not done it yetParticipant @notdoneityet]

Posted by Michael Gilligan on 06/01/2021 10:51:54:

The OP asked a specific question

Sorreee, should have said ‘a universal, not just a specific, solution‘

Perhaps that would have kept you quiet, S?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by not done it yet on 06/01/2021 13:46:00:

Posted by Michael Gilligan on 06/01/2021 10:51:54:

The OP asked a specific question

Sorreee, should have said ‘a universal, not just a specific, solution‘

Perhaps that would have kept you quiet, S?

.

I will be quiet after I have written this:

Your answer simply did not address the question … which, for convenience, I am quoting here with emboldening of the significant points which you appear to have overlooked

[quote]

Hi all

I have a Denford Viceroy with metric leadscrews and graduations of 0.025.

I work with metric drawings but my stumbling block is knowing quickly how much cut is needed to get to size without reaching for the calculator.

For instance, say there is 0.73mm to come off halve it 0.365 (thats the easy bit) how do you know quickly how many 0.025's there are in it.

Regards

[/quote]

Telling a man who has asked that perfectly reasonable question to divide the number by 0.025 is, in my opinion, both patronising and crass.

MichaelG.

[old martParticipant @oldmart]

If you have a digital caliper to hand, it makes conversion easy.

[Author]

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