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JVC M90 screws and switch cap


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#31 Trommelmops

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Posted 04 November 2017 - 11:39 AM

A little update 

 

Today I have changed the shape and now im happy 

with my day work.....

 

Tomorrow I make the last two screws and the driver......

 

:thumbsup:

 

Attached File  20171104_181509.jpg   89.5K   3 downloads



#32 Brownlow

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Posted 04 November 2017 - 01:01 PM

:jawdrop:

Oh wow....!

 

This is great, really great progress.



#33 Trommelmops

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Posted 05 November 2017 - 10:33 AM

So a little update:

 

I forge tomorrow only the PH1 driver into the heads.......i have decided that this is big enough.....

 

Then i can send them to the other side of the globe  :thumbsup:  togehter with the other screws......

 

By the way i have compared the exist screws and they have also the pitch from 1,75mm and 4mm diameter.........I correct only the lenght..... :yes:

 

 

 

And now i have ideas to create the switchcaps.....I inform you......I make some trys if it is possible :hmmm: ....



#34 caution

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Posted 05 November 2017 - 11:35 AM

Nice work! One question - when you determined the thread pitch, did you measure only one gap or did you measure many, and take the average?

 

I'm pretty sure the thread pitch is 1.65mm. Here is what ten gaps measured, and 1.75mm for comparison. Caliper is properly zeroed.

 

26415473579_20cd3a89e3_b.jpg

26415473049_69557e261a_k.jpg



#35 Trommelmops

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Posted 05 November 2017 - 12:11 PM

Oh i have had the pictures from blue_fuz.......

 

And there was the value 1.73mm so i have decided to make them in pitch 1.75mm

 

1.65 is also possible without to know if my lathe is able to create this, could be a inch thread.

 

I have compared all knowned exist thread tables but have nowhere found this pitch, equal if inch or metric, the nearest is at the moment 

 

1.75mm is only 1mm per 16,5mm difference. 

 

But your pictures are very good to compare. I must think about it maybee i can change my changing gears.......Let me think about  :yes:



And to your question: Is good to count 10 threads and measure it so like you did  :thumbsup:

 

And such a good caliper  :lol:  i got a very good TESA......

 

Let me see if i can do this too.....



Update:

 

i have calculate that when im cutting the thread with an 15g inch thread i have only a difference from only 0,75mm per 25,4mm ( 1")

 

this is i think the nearest value which is without problems easy to make. 



#36 caution

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Posted 05 November 2017 - 12:47 PM

That's good news! I wanted to bring this up because if the pitch isn't dead on (or very close) you risk shearing off the plastic threads inside the hole if it's already been threaded with a different pitch.



#37 Trommelmops

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Posted 05 November 2017 - 01:02 PM

Oh I know this. That's the reason why we try to remake this like the original or as near as possible.....

 

Thanks for your commitment and with this info i can now make the right one's  :yes:



#38 T-STER

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Posted 05 November 2017 - 03:46 PM

How does Mr Trommel even make something such as a screw look so good?

 

I'm sure i shouldn't look at a screw and think it looks awesome, but i do.



#39 Trommelmops

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Posted 05 November 2017 - 04:49 PM

:smooch:  :lol:



#40 trippy1313

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Posted 06 November 2017 - 01:51 AM

The Mad Hatter is at it again! Wow Trommel, your magic is stunning. Beautiful work again.

#41 Trommelmops

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Posted 06 November 2017 - 12:50 PM

So I'm finished today the needed screws  :yes:

 

Here the final result of what he get from me 

 

all self-made screws are have a PH 1 driver 

 

Attached File  20171106_175630.jpg   93.25K   1 downloadsAttached File  20171106_175624.jpg   105.79K   1 downloadsAttached File  20171106_180845.jpg   107.7K   1 downloads



#42 caution

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Posted 06 November 2017 - 01:06 PM

Yes actually 1.65mm is VERY close to 0.065", which is 1.651 mm, or 15.38 threads/inch. No inch-based screw uses a fractional value for this.

 

But metric defines the actual thread pitch, so this screw would be M4x1.65. This makes more sense because I can buy M3.5x1.65 screws, but nothing in M4 :no:  Very odd screw.

 

I like that you also adjusted the thread shape to perform optimally in plastic :thumbsup:

REMFORM.jpg



#43 Trommelmops

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Posted 06 November 2017 - 01:57 PM

It exists screws for plastic in a special norm. There I have the shape from.

I have compared the exist scews with mine. The shape of the thread angles are defined.

 

And I have grind the lathe tool to these special angles.

 

my screws are better than the originals

 

but screws with m3 X 1,65 I have never seen and where have you see these screws?  The problem with the screws is that they are not cutted they will be roll forged.



Oh m3,5 sorry but this is easy........

 

I can do this......

 

I have thread cutters here in m3,5  :w00t:

 

Stop!!!! M3,5 have definetly not this Pitch!!! 

 

Where have you seen the screws with 1,65 Pitch?????????????? :blink:



#44 Katsa

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Posted 06 November 2017 - 05:24 PM

omg that is supper cool saves me from going to my parents house to look for extra screws, unless you still need them?



#45 caution

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Posted 06 November 2017 - 09:39 PM

Where have you seen the screws with 1,65 Pitch?????????????? :blink:

 

Plastite 45, Remform, Remform II and Remform II HS all have close versions, but nothing at m4x1.65.

 

There's probably other companies that make these, but didn't look too hard....

Probably in Japan somewhere that I cannot search :sad:



#46 Trommelmops

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Posted 07 November 2017 - 02:25 AM

I have found the Norm here in the file from you: I have marked it.

 

And so i did the screws..... :yes:

 

Attached File  Plasticscrew-4x1,75.jpg   152.5K   1 downloads

 

 



#47 caution

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Posted 07 November 2017 - 02:32 AM

Yeah, I think that's about as close as we're going to get ;-)



#48 Trommelmops

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Posted 09 November 2017 - 03:23 PM

Little update:

 

in the meantime i have try out to create a switchcap.....And let me say the following:

 

At this moment one of the testcaps is on the way to blue_fuz  :yes: that he can tell me about the fitting and some other questions i will have........

 

This is only for a test, i have one made in alu....should be a little surprise to him  :-D

 

I know i have told that this isnt possible, but i changed my own opinion: One smart guy sayed to me: Trommelmops what you not do you cannot learn  :lol:

 

Oh he's so right......

 

Im sure you see the first testcap which isnt not yet finished to 100% on a picture soon..... :-D



#49 blu_fuz

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Posted 16 November 2017 - 01:01 PM

Can't wait to try these screws! Thank you.Attached File  IMG_1546.JPG   68.27K   1 downloads

#50 Trommelmops

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Posted 16 November 2017 - 01:40 PM

Looks good and when they have a little to much pitch I can do the correct pitch now

 

From now on I can make them in 1.65mm pitch and can change the lathe tool a little......

 



#51 blu_fuz

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Posted 16 November 2017 - 02:03 PM

They are very close thread count and pitch. Could be adjusted a little, I can get more dimensions for you. I will try tonight.



#52 Trommelmops

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Posted 16 November 2017 - 02:31 PM

Not needed Joe I have all info's.....

 

More needed is the switch cap.....if it fits 

 

Then I have the correct dimension and can make a final one  :-D



#53 blu_fuz

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Posted 16 November 2017 - 04:28 PM

The little cap is beautiful, I will check the fitting of that as well.



#54 blu_fuz

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Posted 18 November 2017 - 06:23 PM

The screws worked!!!!! Used all of the long ones you sent!

The switch cap needs more tweeking.

Attached File  IMG_1570.JPG   94.21K   0 downloadsAttached File  IMG_1571.JPG   63.3K   0 downloadsAttached File  IMG_1572.JPG   75.23K   2 downloadsAttached File  IMG_1573.JPG   94.34K   1 downloads

#55 Trommelmops

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Posted 19 November 2017 - 09:21 AM

OK...i need help to understand: Is the gap to tight? Which thickness has the slidermaterial?

 

I have made the testthing with 1.15mm gap but i think is 1.2mm?????

 

I need then a new measurement from you with the correct thickness...... :yes:

 

Cool that the screws working  :clap: