Another question Ed. What formula are you using to determine what size hole to make, in relation to the OD of the inserts?
Willie
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Inserts
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02-01-2022, 10:13 AM
It's usually specified with the inserts. If it gives a range, use smaller size in softer plastics, larger in harder ones.
Full of ideas, but slow to produce parts
02-01-2022, 10:27 AM
(01-31-2022, 11:37 AM)Highpower Wrote: Bear in mind I am only thinking about replacing inserts that have been broken out vs. installing them fresh in a new housing. My only use would be for making repairs. Years & years ago I worked at a machine shop that made items for the US military, virtually all for the Navy. I do remember some torpedo nose cone parts made from cast aluminum that required some steel inserts. That was the first and only time I ever encountered specs for an item that included thread inserts as part of its manufacturing. All the other times I have used thread inserts was to make a repair. 
02-01-2022, 11:12 AM
(02-01-2022, 09:27 AM)Highpower Wrote: Another question Ed. What formula are you using to determine what size hole to make, in relation to the OD of the inserts? I measured the inserts and guesstimated what the hole size should be and tweaked them if necessary. I went through all of the sizes of inserts I have and wrote down what the hole size should be. Then I tested them in PLA to make sure. The inserts I got didn't specify what the hole size should be. Ed Thanks given by: Highpower
02-01-2022, 01:45 PM
(02-01-2022, 11:12 AM)EdK Wrote: I measured the inserts and guesstimated what the hole size should be and tweaked them if necessary. I went through all of the sizes of inserts I have and wrote down what the hole size should be. Then I tested them in PLA to make sure. The inserts I got didn't specify what the hole size should be. OK, I thought as much. I ordered a small combination set from the same ebay seller you used. I guess I will have to experiment in trying to use them in epoxy too. I have some missing inserts in a couple of my Simpson meters with Bakelite cases where the bosses have broken out. Will have to rebuild new bosses from epoxy since I don't think my plastic 'welding rods' will work. Stan, 99% of my Heli-Coil use has been for repairs as well although I have had made a few aluminum fixtures in the past where I installed them from the get-go because the threads were going to get used quite a bit. Changing hold down clamps, repeated mounting on a tripod etc., etc. Unfortunately my riv-nut sets or welders aren't going to help much on plastics and Bakelite.
Willie
02-01-2022, 02:17 PM
(02-01-2022, 01:45 PM)Highpower Wrote: Unfortunately my riv-nut sets or welders aren't going to help much on plastics and Bakelite. This is your chance to make plate steel cases for everything!
Full of ideas, but slow to produce parts
07-23-2022, 01:02 PM
Got some 1/4-20 inserts for a project so I had to make an installation tool for them.
Ed |
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