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Machinable Potting Material ???

Paul Koretko All Messages By This Member #90621 Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts.? I remember reading someplace about a machinable potting material that is easily flowed into a mold.? I've tried JB Weld, but it doesn't flow well.? It has a tendency to leave void areas.? I want to drill a new set screw hole and hand tap it for 4-40 set screw.? I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help.? Any advice will be appreciated.? I will also post this to some of the other groups I read. TNX? es? 73? de? WABAG? .. Paul K.
Tom Miller #90622 ? JB weld will flow if you heat it. ? Regards ? ? toggle quoted message Show quoted text ----- Original Message ----- From: hglent@... [hp_agilent_equipment] To: hp_agilent_equipment@... Sent: Saturday, August 18, 2018 6:02 PM Subject: [hp_agilent_equipment] Machinable Potting Material ??? ? Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts.? I remember reading someplace about a machinable potting material that is easily flowed into a mold.? I've tried JB Weld, but it doesn't flow well.? It has a tendency to leave void areas.? I want to drill a new set screw hole and hand tap it for 4-40 set screw.? I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help.? Any advice will be appreciated.? I will also post this to some of the other groups I read. TNX? es? 73? de? WABAG? .. Paul K.
Leon Robinson #90624 What about Helicoils. ? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. From: "hglent@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Saturday, August 18, 2018 5:02 PM Subject: [hp_agilent_equipment] Machinable Potting Material ??? ? Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts.? I remember reading someplace about a machinable potting material that is easily flowed into a mold.? I've tried JB Weld, but it doesn't flow well.? It has a tendency to leave void areas.? I want to drill a new set screw hole and hand tap it for 4-40 set screw.? I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help.? Any advice will be appreciated.? I will also post this to some of the other groups I read. TNX? es? 73? de? WABAG? .. Paul K.
Peter Gottlieb All Messages By This Member #90625 开云体育 I would think those better than any potting compound by far.? Peter On Aug 18, 2018, at 9:14 PM, Leon Robinson leon-robinson@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: toggle quoted message Show quoted text ? What about Helicoils. ? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. From: "hglent@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: hp_agilent_equipment@... Sent: Saturday, August 18, 2018 5:02 PM Subject: [hp_agilent_equipment] Machinable Potting Material ??? ? Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts.? I remember reading someplace about a machinable potting material that is easily flowed into a mold.? I've tried JB Weld, but it doesn't flow well.? It has a tendency to leave void areas.? I want to drill a new set screw hole and hand tap it for 4-40 set screw.? I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help.? Any advice will be appreciated.? I will also post this to some of the other groups I read. TNX? es? 73? de? WABAG? .. Paul K.
Michael A. Terrell All Messages By This Member #90626 How about these? Thread one onto the end of a long 4-40 screw, heat it and push it into a pre-drilled hole? Once the plastic cools, it shouldn't be able to move. 20x-4-4-40-Brass-Threaded-Heat-Set-Inserts-for-Plastic-3D-Printing-Metal-Nuts Michael A. Terrell toggle quoted message Show quoted text -----Original Message----- From: "Peter Gottlieb hpnpilot@... [hp_agilent_equipment]" I would think those better than any potting compound by far. Peter On Aug 18, 2018, at 9:14 PM, Leon Robinson leon-robinson@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: What about Helicoils. Leon Robinson K5JLR From: "hglent@... [hp_agilent_equipment]" Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts. I remember reading someplace about a machinable potting material that is easily flowed into a mold. I've tried JB Weld, but it doesn't flow well. It has a tendency to leave void areas. I want to drill a new set screw hole and hand tap it for 4-40 set screw. I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help. Any advice will be appreciated. I will also post this to some of the other groups I read. TNX es 73 de WABAG ..
Adrian Nicol All Messages By This Member #90628 开云体育 Just fixed some stripped bakelite knobs from a 1920's radio using 4BA Helicoils - worked great! On 8/19/2018 4:14 AM, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] wrote: toggle quoted message Show quoted text ? I would think those better than any potting compound by far.? Peter On Aug 18, 2018, at 9:14 PM, Leon Robinson leon-robinson@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: ? What about Helicoils. ? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. From: "hglent@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: hp_agilent_equipment@... Sent: Saturday, August 18, 2018 5:02 PM Subject: [hp_agilent_equipment] Machinable Potting Material ??? ? Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts.? I remember reading someplace about a machinable potting material that is easily flowed into a mold.? I've tried JB Weld, but it doesn't flow well.? It has a tendency to leave void areas.? I want to drill a new set screw hole and hand tap it for 4-40 set screw.? I remember seeing some discussion on potting material on one of the groups I read, so I'm asking for help.? Any advice will be appreciated.? I will also post this to some of the other groups I read. TNX? es? 73? de? WABAG? .. Paul K.
Reginald Beardsley All Messages By This Member #90630 If you have a drill press, you can chuck a threaded screw and drill the tap hole for 4-40 by feeding the quill onto a drill bit held stationary in a chuck.? I used this technique to salvage an $85 air valve on a Toyota Tercel. I'd broken a plastic teet off taking it off.? So I drilled the proper size hole in a length of a #10-24 screw, shaped the end with a file in the drill press, took it out.? I don't recall now if I used a tap or? cut a groove? to tap the plastic and.? I put epoxy on the threads and screwed it.? It worked like a charm. The principle here is that a rotating workpiece will cause the drill to follow the center of rotation.? You can see the setup I used here: It didn't aign as well as needed for the differential screw, but for your purpose it would be fine.
ac2pl All Messages By This Member #90631 although i've not tried it myself, there are many videos and posts showing that superglue plus baking soda makes a very durable material. 73 ac2pl

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