Stripped Thread

Stainless · Aug 18, 2015

I have a 3/8 x 16 thread that is stripped. Should I use a heli-coil or drill out and tap up a size? I would rather helicoil but never installed one, do you have to rent or purchase a tool to insert it? I watched a video yesterday and it looks like you need a tool to spin it in and seat it.

If I tap up can I go to 7/16 or does it need to be 1/2"

Racey · Aug 18, 2015

Stainless said:
I have a 3/8 x 16 thread that is stripped. Should I use a heli-coil or drill out and tap up a size? I would rather helicoil but never installed one, do you have to rent or purchase a tool to insert it? I watched a video yesterday and it looks like you need a tool to spin it in and seat it.

If I tap up can I go to 7/16 or does it need to be 1/2"

Heli-coil, when you buy the kit it comes with the tap and inserting tool. They have them on Amazon, & McMaster. probably around $30-$40

The insert tool is just a plastic shaft that pulls the coil in from the bottom. It is the cheapest part of the whole kit, the tap is where the money is.

2FORCEFULL · Aug 18, 2015

Stainless said:
I have a 3/8 x 16 thread that is stripped. Should I use a heli-coil or drill out and tap up a size? I would rather helicoil but never installed one, do you have to rent or purchase a tool to insert it? I watched a video yesterday and it looks like you need a tool to spin it in and seat it.

If I tap up can I go to 7/16 or does it need to be 1/2"

I usally tap it to the next size metric... seems to work every time

Stainless · Aug 18, 2015

Racey said:
Heli-coil, when you buy the kit it comes with the tap and inserting tool. They have them on Amazon, & McMaster. probably around $30-$40

Cool, that's what I was hoping to hear bc I didn't like the idea of one bolt in a series being a different size. Thanks Racey!

Stainless · Aug 18, 2015

2FORCEFULL said:
I usally tap it to the next size metric... seems to work every time

This would have been easier but Racey confirmed what I wanted to hear, thanks for the response Steve!

pipemn · Aug 18, 2015

If your in Havasu I have just about all sizes inserts,tools,and bits for metric and gringo your more than welcome to use.

Stainless · Aug 18, 2015

pipemn said:
If your in Havasu I have just about all sizes inserts,tools,and bits for metric and gringo your more than welcome to use.

Thank you and appreciate the offer but I'm in Tucson. Looking at them on Amazon now.

Sandlord · Aug 18, 2015

Stainless said:
Thank you and appreciate the offer but I'm in Tucson. Looking at them on Amazon now.

many auto parts stores have the kits in stock

Stainless · Aug 18, 2015

Sandlord said:
many auto parts stores have the kits in stock

Yea, I may go to Copper State Nut and Bolt and pick up the kit.

How's the build going, when are you moving?

Sandlord · Aug 18, 2015

Stainless said:
Yea, I may go to Copper State Nut and Bolt and pick up the kit.

How's the build going, when are you moving?

We break ground at the end of the month,
I'll be out there this weekend to move some Barrel cacti.
Build should take about 4 months.

Wheeler · Aug 18, 2015

Depending on the application, you might consider Keenserts as an option.

http://www.aircraftfast.com/keensert-inserts.htm

[video=youtube;XyCTh23Z6o0]https://www.youtube.com/watch?v=XyCTh23Z6o0[/video]

Stainless · Aug 18, 2015

Wheeler said:
Depending on the application, you might consider Keenserts as an option.

http://www.aircraftfast.com/keensert-inserts.htm

View attachment 427798

[video=youtube;XyCTh23Z6o0]https://www.youtube.com/watch?v=XyCTh23Z6o0[/video]

RDP never ceases to amaze me of the knowledge base here. [emoji106]
Thanks for the link and video Wheeler!

DLow · Aug 18, 2015

Stainless said:
Yea, I may go to Copper State Nut and Bolt and pick up the kit.

How's the build going, when are you moving?

Copper state will have what you need. They also have everything you may ever need, and everything you will never need.

TBI · Aug 18, 2015

Stainless · Aug 18, 2015

DLow said:
Copper state will have what you need. They also have everything you may ever need, and everything you will never need.

Yea, I'm a regular. [emoji23]
Another place I love is Industrial Metals Porn. [emoji39]

JBS · Aug 18, 2015

Wheeler said:
Depending on the application, you might consider Keenserts as an option.

http://www.aircraftfast.com/keensert-inserts.htm

View attachment 427798

[video=youtube;XyCTh23Z6o0]https://www.youtube.com/watch?v=XyCTh23Z6o0[/video]

You beat me to it Wheeler. These are WAY better. They come in thin and thick versions. They are a permanent repair.

Crazyhippy · Aug 18, 2015

Stainless said:
Yea, I'm a regular. [emoji23]
Another place I love is Industrial Metals Porn. [emoji39]

McFadden-Dale

I know there is one in Phoenix, not sure about Tucson.

Bigbore500r · Aug 18, 2015

2FORCEFULL said:
I usally tap it to the next size metric... seems to work every time

And then your boat starts to become like a 87 IROC camaro....

Stainless · Aug 18, 2015

Crazyhippy said:
McFadden-Dale

I know there is one in Phoenix, not sure about Tucson.

No, we only have Fastenal and Copper State and Grainger. I prefer Copper State, guys at the counter are cool and I think they're a home grown AZ business.
I get to Phoenix occasionally on business so I'll check out McD next time I'm in town. [emoji106]

SLOPOKE · Aug 18, 2015

If you already have a 1/2-13 tap and a .453 diameter drill. PM me your address and I will throw a keensert in the mail. I buy these by the 1000's

Stainless said:
RDP never ceases to amaze me of the knowledge base here. [emoji106]
Thanks for the link and video Wheeler!

Sandlord · Aug 18, 2015

SLOPOKE said:
If you already have a 1/2-13 tap and a .453 diameter drill. PM me your address and I will throw a keensert in the mail. I buy these by the 1000's

If I lived there already, I'd help.
I've installed thousands of them.
I Likely have the drills and taps as well.

Mandelon · Aug 18, 2015

How awesome is this....

A thread about a thread.

Just amazing.

Stainless · Aug 18, 2015

SLOPOKE said:
If you already have a 1/2-13 tap and a .453 diameter drill. PM me your address and I will throw a keensert in the mail. I buy these by the 1000's

Thanks for the offer, I don't want to trouble anyone for it. [emoji106]
Are the Keenserts thicker, the reason for the .453 drill and 1/2x13 tap?

Stainless · Aug 18, 2015

Mandelon said:
How awesome is this....

A thread about a thread.

Just amazing.

Actually it would be about a lack thread.
[emoji13]

Sandlord · Aug 18, 2015

Stainless said:
Thanks for the offer, I don't want to trouble anyone for it. [emoji106]
Are the Keenserts thicker, the reason for the .453 drill and 1/2x13 tap?

yes, the keenserts are threaded on the outside as well, but you drill a bigger hole than you would for a normal 1/2-13 thread

Sandlord · Aug 18, 2015

Here is an example of the chart for the heavy duty ones. You dont need the installation tool, you can knock down the locking tangs with a hammer and a punch/

https://www.carrlane.com/catalog/in...F0900101B030010543C1C0C16190D172D252A5E475957

and thin wall
https://www.carrlane.com/catalog/in...F0900101B030010543C1C0C16190D172D252A5E475A5F

Racey · Aug 18, 2015

JBS said:
You beat me to it Wheeler. These are WAY better. They come in thin and thick versions. They are a permanent repair.

Heli-coils are actually pretty damn good, in aluminum a helicoil thread is stronger than the original tapped thread because the helicoil wire is made from a hard stainless alloy, and the surface engagement is greater into the original part. I have never had a helicoil fail if done properly. On deep holes you can stack up a couple helicoils also. :thumbup:

JBS · Aug 18, 2015

Racey said:
Heli-coils are actually pretty damn good, in aluminum a helicoil thread is stronger than the original tapped thread because the helicoil wire is made from a hard stainless alloy, and the surface engagement is greater into the original part. I have never had a helicoil fail if done properly. On deep holes you can stack up a couple helicoils also. :thumbup:

I don't do a lot with Aluminum good to know

Classic Daycruiser · Aug 19, 2015

:thumbup:

8265-S_J-B_Weld-USA_grande_5f045738-0350-44e1-8938-c67ac12c1dcf_1024x1024.jpg

SLOPOKE · Aug 19, 2015

I went outside and rounded up some of the most popular inserts customers use.
All are 3/8-16 from left to right.

Helicoil
Pros .. Easy to buy, small outside diameter.
Cons.. unscrew easily, special install tools and taps required, weakest of the inserts.

Timesert
Pros.. same outside diameter as helicoil, way better than helicoil.
Cons..special install tools and taps required.

northwestern
Pros.. standard drill / tap tooling, better pullout resistance than helicoil,
Cons.. unscrew resistance is dependent upon locking compound.

EZ lok
Pros.. standard drill / tap tooling, better pullout resistance than helicoil,
Cons.. unscrew resistance is dependent upon locking compound.

Taplock
Pros.. no tap required, best pullout strength of all inserts shown.
Cons.. hard to install without machine, unscrew resistance is not as good as keylocking.

Keenserts (3) light, heavy, extra heavy. Same 3/8-16 internal with 3 steps of external size
Pros.. standard drill / tap tooling, 2nd best pullout resistance, best resistance to unscrewing
Cons.. minimal

rivermobster · Aug 19, 2015

SLOPOKE said:
I went outside and rounded up some of the most popular inserts customers use.
All are 3/8-16 from left to right.

Helicoil
Pros .. Easy to buy, small outside diameter.
Cons.. unscrew easily, special install tools and taps required, weakest of the inserts.

Timesert
Pros.. same outside diameter as helicoil, way better than helicoil.
Cons..special install tools and taps required.

northwestern
Pros.. standard drill / tap tooling, better pullout resistance than helicoil,
Cons.. unscrew resistance is dependent upon locking compound.

EZ lok
Pros.. standard drill / tap tooling, better pullout resistance than helicoil,
Cons.. unscrew resistance is dependent upon locking compound.

Taplock
Pros.. no tap required, best pullout strength of all inserts shown.
Cons.. hard to install without machine, unscrew resistance is not as good as keylocking.

Keenserts (3) light, heavy, extra heavy. Same 3/8-16 internal with 3 steps of external size
Pros.. standard drill / tap tooling, 2nd best pullout resistance, best resistance to unscrewing
Cons.. minimal

This is an accurate breakdown.

I've never had any luck using Helicoil products at all. [emoji107]

I like the Timesert product line the best. [emoji106]

Wheeler · Aug 19, 2015

rivermobster said:
I've never had any luck using Helicoil products at all. [emoji107]

Have you tried the serrated helicoils? They work fine. :thumbup:

rivermobster · Aug 19, 2015

Wheeler said:
Have you tried the serrated helicoils? They work fine. [emoji106]

Nope. I haven't used a helicoil since I discovered timesert.

We have every size kit at the shop.

Wheeler · Aug 19, 2015

rivermobster said:
We have every size kit at the shop.

Everything? How about a 1/2 12 left hand thread? :hmm

rivermobster · Aug 19, 2015

Wheeler said:
Everything? How about a 1/2 12 left hand thread? :hmm

I'd have to check. But, I know we have every thread size you would find on an engine. We have every spark plug repair kit as well.

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