I need to repair a few threads on this old Homelite 1050 I'm working on. The threads are 12-24. I can't find keysert style inserts in that size. Anyone have any tips?
If you used 10-24 or 10-32 inserts in this application, each of them would provide 700-800 lbs of clamping load in this application. This is likely a place where overkill is not necessary, as long as you only apply 2-3 ft-lbs of torque to the fastener upon assembly. Take a look at this table to see how much clamping load fasteners apply.
http://www.spaenaur.com/pdf/sectionD/D48.pdf
A metric M5 fastener is really really close to a 10-32 fastener. You can interchange the nuts in some cases, they are that close. M5's are used all over new Stihls, even the cylinder bolts on a bunch of the saws.
These are #12. How about going with 6mm then? I actually have a couple 6mm keyserts here. Hmmm.
You could rethread a M4 or maybe M5 insert to 12-24.
Here is a 5/16" solid insert.
The M4 and M5 insert uses a 8mm tap, close to 5/16", the M6 insert use a 10mm or 12mm tap.
What do you have against using the helicoil.
They're fine, but solid inserts are better.
Brad,
Just use helicoil's. You can put red locktight on it if you are afraid of it backing out on the screw.
Look on amazon for the best price on helicoil kits.
What do you have against using the helicoil.
They're fine, but solid inserts are better.
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