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How useful is high 5000rpm spindle speed in a mill

This is yet another 'which mill' thread in disguise.

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Bob Unitt 127/07/2022 14:43:33
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323 forum posts
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Posted by Robert Atkinson 2 on 27/07/2022 11:51:41:

OK, this is weird.

I've been looking at mills for sale and I just took a telephone call from ARC Eurotrade asking for SWMBO by name. SWMBO would not know a mill from lathe if her life depended on it. We do have an anniversary coming up though.

Robert G8RPI.

Have you got a birthday coming up ?

jaCK Hobson27/07/2022 16:34:41
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Posted by Mark Rand on 26/07/2022 17:45:50:
Either it's a little bit tighter than the commercial nuts and bolts (which tend to be a rather sloppy fit). If so tighten the die up ever so slightly and take another pass.

Or there's a bit of a burr on the start of one of the threads that the chamfer on the commersical nuts and bolts are navigating ok. If so, a bit of work with a file or deburring tool might help.

Meanwhile:- Nice work. smiley

The die is not split. Comes from the std machinemart metric tap/die set.

I can't work out what happened. Maybe the thread blank was oversize slightly when I cut it - I remember it being a little tricky to start. I filed off about .5 mill of the thread diameter and ran the die up and down with positive/negative pressure etc to try and get a bit more metal off... but the threaded hole just won't have it.

Robert Atkinson 227/07/2022 17:16:14
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1891 forum posts
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Posted by Bob Unitt 1 on 27/07/2022 14:43:33:
Posted by Robert Atkinson 2 on 27/07/2022 11:51:41:

OK, this is weird.

I've been looking at mills for sale and I just took a telephone call from ARC Eurotrade asking for SWMBO by name. SWMBO would not know a mill from lathe if her life depended on it. We do have an anniversary coming up though.

Robert G8RPI.

Have you got a birthday coming up ?

No , she got me a spectrum analyser for my birthday. This would be wedding anniversary

Robert Atkinson 228/07/2022 14:49:22
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1891 forum posts
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Another example of excellent customer service fro ARC Euro Trade today. They called my wife to ask what sort of work I was likely to be doing becuse the mill she ordered was designed more for "electronics" work than traditionsl model making.
She was able to assure them that I am "electronic" in my hobby (and work).

Great example of somone at ARC actually thinking about the order and not just ticking the box.

Robert G8RPI.

jaCK Hobson12/06/2023 12:26:34
383 forum posts
101 photos

A couple more useful basic milling projects.

fileguidevice.jpg

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