Messed up ....help please
Thread Starter
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Club Member
Joined: Jun 2009
Posts: 5,323
Likes: 37
From: NJ
Much appreciated.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,547
Likes: 7,153
From: Oxford, Nc
My older primary had the inspection cover over the adjuster. Over the years the threads just got weak and I tapped them out the 5/16"/18. There is plenty of meat there but the 5/16" allen bolts I used have heads that are obviously bigger. The Time -Sert method will work fine.
Seasoned HDF Member
Joined: Apr 2009
Posts: 44,793
Likes: 29,729
From: PNW
I don't think Helicoils or Time-certs will work for your derby cover. The primary is stamped sheet steel. While it's fairly thick sheet steel, it still doesn't have enough material to sink either of those into.
I've used expanding threaded aluminum sleeves in thin steel. You would drill the primary hole out per the instructions, insert the aluminum barrel until it bottoms out on the lip, then use the provided tool to expand the sleeve. It's basically a 1/4-20 screw with a washer. You tighten it, which deforms the sleeve, causing it to expand and lock into the hole. You need to make sure to tighten it down for enough expansion or eventually it will just spin in the hole and you won't be able to remove the 1/4 -20 screw that holds the derby cover on.
I'm pretty sure most decent hardware stores have them.
I've used expanding threaded aluminum sleeves in thin steel. You would drill the primary hole out per the instructions, insert the aluminum barrel until it bottoms out on the lip, then use the provided tool to expand the sleeve. It's basically a 1/4-20 screw with a washer. You tighten it, which deforms the sleeve, causing it to expand and lock into the hole. You need to make sure to tighten it down for enough expansion or eventually it will just spin in the hole and you won't be able to remove the 1/4 -20 screw that holds the derby cover on.
I'm pretty sure most decent hardware stores have them.
Thread Starter
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Club Member
Joined: Jun 2009
Posts: 5,323
Likes: 37
From: NJ
If the screw is 1/4 20 then the insert would be what size drill hole?
I guess all that info is in the kit.
I'm just obsessing at this point.
Tourer
Joined: Mar 2010
Posts: 400
Likes: 4
From: southern ontario
When you buy the kit it will tell you what size of drill to use.
Seasoned HDF Member
Joined: Sep 2007
Posts: 9,741
Likes: 1,598
From: Danbury CT
I would buy 5 5/16-18 or 24 stainless or chrome bolts in the proper length and retap all 5 holes.
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Thread Starter
|
Club Member
Joined: Jun 2009
Posts: 5,323
Likes: 37
From: NJ
I don't think Helicoils or Time-certs will work for your derby cover. The primary is stamped sheet steel. While it's fairly thick sheet steel, it still doesn't have enough material to sink either of those into.
I've used expanding threaded aluminum sleeves in thin steel. You would drill the primary hole out per the instructions, insert the aluminum barrel until it bottoms out on the lip, then use the provided tool to expand the sleeve. It's basically a 1/4-20 screw with a washer. You tighten it, which deforms the sleeve, causing it to expand and lock into the hole. You need to make sure to tighten it down for enough expansion or eventually it will just spin in the hole and you won't be able to remove the 1/4 -20 screw that holds the derby cover on.
I'm pretty sure most decent hardware stores have them.
I've used expanding threaded aluminum sleeves in thin steel. You would drill the primary hole out per the instructions, insert the aluminum barrel until it bottoms out on the lip, then use the provided tool to expand the sleeve. It's basically a 1/4-20 screw with a washer. You tighten it, which deforms the sleeve, causing it to expand and lock into the hole. You need to make sure to tighten it down for enough expansion or eventually it will just spin in the hole and you won't be able to remove the 1/4 -20 screw that holds the derby cover on.
I'm pretty sure most decent hardware stores have them.
Has anyone used a time cert successfully in a stripped derby cover application????
