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21
Telechron & GE Clocks / Re: Removing Adhesive Residue
« Last post by Kid Clock on January 22, 2020, 06:38:13 PM »
PlastX, AutoZone...

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Telechron & GE Clocks / Re: Removing Adhesive Residue
« Last post by Mrbill5 on January 22, 2020, 06:10:40 PM »
I ran into this problem last week on a bakelite Cyclometer.  The case had some hardened adhesive about 1 " x 3"  and about 1/8" wide. Looked like some tape was removed but not all the adhesive came off.  Naptha did nothing, 99% isopropanol did nothing.  I ended up very carefully scraping the residue with a plastic putty knife.  Then I polished the case with Novus. 
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Telechron & GE Clocks / Re: Removing Adhesive Residue
« Last post by 19and41 on January 22, 2020, 03:27:56 PM »
If it is in fact unpainted bakelite, it can be pretty forgiving with trying solvents.  I try naptha (lighter fluid) first, then alcohol then acetone.  Tf any of them leaves a adhesive colored mark on your cleaning cloth, you've found it.  Make dead certain it's unpainted bakelite first.
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Telechron & GE Clocks / Re: Removing Adhesive Residue
« Last post by 19and41 on January 22, 2020, 03:20:41 PM »
Is it hardened or soft?
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Telechron & GE Clocks / Removing Adhesive Residue
« Last post by Chadakoin on January 22, 2020, 03:19:24 PM »
Anyone have a recommendation for removing trim adhesive residue from bakelite?
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Telechron & GE Clocks / Re: Screw threading.
« Last post by Mrbill5 on January 21, 2020, 03:57:09 PM »
4-36.  Had to clean off the screws with naptha in order to run it.
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Telechron & GE Clocks / Re: Screw threading.
« Last post by Mrbill5 on January 21, 2020, 03:36:09 PM »
I will check.  Updating my laptop computer software, have to do that first.
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Telechron & GE Clocks / Re: Screw threading.
« Last post by henny on January 21, 2020, 03:16:52 PM »
I am stumped.  I have 2 clocks with the same machine screws but my thread checker does not work with the screw I am trying to match.  The screws in question are on a 711 clock, either one of the 3 back screws or the 2 bottom screws that hold the bakelite base to the metal case.  The same screw is found on the back of the vertical 8 series bakelite Cyclometer.  I tried the local hardware store, no go.  I thought it was a 5-40 × 3/8" screw but it is oh so slightly too large and wrong threading.

It might be 4-48. (.112" O.D. and 48 TPI)  That's the next size down and with a NF pitch.
29
Telechron & GE Clocks / Screw threading.
« Last post by Mrbill5 on January 21, 2020, 02:17:05 PM »
I am stumped.  I have 2 clocks with the same machine screws but my thread checker does not work with the screw I am trying to match.  The screws in question are on a 711 clock, either one of the 3 back screws or the 2 bottom screws that hold the bakelite base to the metal case.  The same screw is found on the back of the vertical 8 series bakelite Cyclometer.  I tried the local hardware store, no go.  I thought it was a 5-40 × 3/8" screw but it is oh so slightly too large and wrong threading.
30
Telechron & GE Clocks / Re: 7F75
« Last post by 19and41 on January 21, 2020, 09:46:10 AM »
The Airlux I have had the gear off the set shaft and I soldered the gear back on.  That has worked out well.
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