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November 19, 2018, 23:40:07 pm


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Author Topic: Watch!..  (Read 54286 times)
Arie kabaalstra
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« Reply #195 on: December 28, 2017, 13:09:42 pm »

This one still has those rays.. don't you worry.. but those rays are a pain to photograph..
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BR52
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« Reply #196 on: December 28, 2017, 16:51:37 pm »

Hi Arie,

circular sanding by friction.

See: http://adaptivemap.ma.psu.edu/websites/friction/disc_friction/discfriction.html

You do not need to use math.  Grin

   Armando


* acabamento.jpg (61.13 KB, 750x508 - viewed 89 times.)
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Arie kabaalstra
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« Reply #197 on: December 29, 2017, 20:32:18 pm »



Let there be light.. i applied new luminous compound to the indices.
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Arie kabaalstra
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« Reply #198 on: January 12, 2018, 21:57:08 pm »



i spent all day in the workshop today.. and what did i make?.. 20 stems for internal divebezels in watches..

CamBam made this happen..  Grin
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lloydsp
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« Reply #199 on: January 12, 2018, 23:34:29 pm »

DAWM, Boy!

That's some pretty-small work!  I know you make watches, but -- still! <grin>

Lloyd
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Bubba
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« Reply #200 on: January 13, 2018, 00:00:15 am »

It seems like punishment to be stuck making tiny parts..  Grin
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Arie kabaalstra
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« Reply #201 on: January 13, 2018, 11:17:30 am »

the machine don't care..

If i program G01 X100, or G00 X0.01,the machine don't mind Grin
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Bubba
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« Reply #202 on: January 13, 2018, 11:57:16 am »

I was thinking, and referring to the deburring operation.  Grin Grin
« Last Edit: January 13, 2018, 12:00:02 pm by Bubba » Logged

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Arie kabaalstra
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« Reply #203 on: January 13, 2018, 12:15:08 pm »

deburring?.. if you pick your turning operations order right.. there's nothing to deburr, and a 0.4 m endmill?. doesn't realy leave a burr either..  Cheesy
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Garyhlucas
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« Reply #204 on: January 13, 2018, 15:01:12 pm »

You could use the smallest vibratory tumbler made and still  do 10,000 pcs. at one time!  Wonder what media would be appropriate?  Or maybe just the parts and some soft plastic media plus some polishing compound.
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Arie kabaalstra
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« Reply #205 on: January 13, 2018, 17:39:24 pm »

as "uncle Bumblefuck" from the people's republic of kanuckistan would say.. tape a pill bottle to a hoo-ha rattler, that would chooch nicely, and cost you only a few dollhairs.. some arkansas oilstone powder would do as a medium.. Smiley



in the mean time.. i went one smaller.. ø2.25mm , x 1.2 mm, ø1.5 mm bore, it is a hub for an hour hand
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Dragonfly
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« Reply #206 on: January 13, 2018, 20:38:06 pm »

I am used to your achievements already but I'd like to say I like your style Smiley
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Arie kabaalstra
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« Reply #207 on: January 13, 2018, 21:06:19 pm »

and i still need to make even smaller ones... i did make one hub with a 0.9mm bore, but i think the wall thickness must be reduced to 0.12 because, i couldn't fit the hub over the cannon pinion of my movement.. less wall thickness means more flex.. 0.15 is perfectly fine for a 1.5mm bore, but  it looks like it is too much for a 0.9mm bore..Let's try that tomorrow.. Smiley
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Arie kabaalstra
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« Reply #208 on: January 13, 2018, 22:55:15 pm »



all in a day's work.. Smiley
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Bob La Londe
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« Reply #209 on: January 14, 2018, 14:52:13 pm »

Arie, I've been thinking about making a couple watch cases.  I don't want to make watches.  Zero desire.  I am busier than I can handle just making molds for people.  I'm also not particularly interested in learning to work with titanium  I seem to recall in previous post you were pretty disparaging about stainless, but for those cases made of stainless which alloy tends to hold up the best.  From what I have read so far that looks like 316L.  I recently machined some 316L for an unrelated project, and I was not impressed.  Very difficult to get a good finish.  I was curious if there was another alloy that machined better and was as corrosion resistant.  Perhaps two alloys that both work ok, to reduce the galling you get with stainless on stainless. 

I have a couple old digitals I'd like to place in tougher waterproof cases for hunting and fishing.  I was thinking compressed o-ring seal for the crystal and the back with o-ring sealed access screws for the buttons.  ie:  No exposed buttons.  You must open the screw to set the time.  I know.  Checking it at night could be an issue, but my main goal is a really tough watch for fishing tournaments and making weigh in on time. 

If titanium is the only real answer.. which grade? 

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