Never want to break a tap again? Nut inserts!

Doh · 30th November 2003, 03:06 PM

Hello everyone,
I'm currently in the process of putting together the chassis for my APOX kit. While I was shopping McMaster Carr for hole taps and drill bits, I came across some stainless steel threaded nut inserts. (McMaster Part number 98560A526) I think they are also called A-T series nut inserts.

Does anyone have any experience with these? If they work, they seem like a fool-proof way of creating threaded holes without the possibility of breaking taps etc.

I think that, instead of buying the very expensive installation tool, it would be possible to install these with a suitable length screw, allen wrench, and something to use as a spacer like a drill bushing (McMaster part number 8509A11, for example)

Thanks in advance!

Doh

Magura · 4th December 2003, 06:42 PM

Hmm...cutting thread actually isnt that big a deal.....

Just make sure you use the right lubricant.

For steel, brass, copper and titanium, use cutting fluid( rocol and others).

For aluminium, use alcohol.

If done like that you should never brake a tap......that is if you remember to buy a new one now and then....old taps are bound to brake sooner or later (mostly sooner)

Magura

Doh · 4th December 2003, 07:04 PM

Thanks Magura,
I ended up deciding that drilling a small hole was quite a bit more preferable to drilling a big one and using a nut insert. I used Peter Daniel's technique of using a drill gun, with a makeshift drill guide and the holes came out beautifully.

Doh

Petter · 4th December 2003, 07:05 PM

If you chassis is Aluminium, and relatively thin skinned, the threads won't last. Inserts is the way to go in that case.

Petter

Peter Daniel · 4th December 2003, 07:08 PM

Anything that is 1/8 " , or so, is not a problem. After all you assemble it only once, right?

Magura · 4th December 2003, 07:11 PM

sure....once a week

Magura

Doh · 4th December 2003, 07:15 PM

I think the threads will be ok. I'm using 3/8" screws to hold a 4mm panel (without threads) to the back end of my APOX chassis. For most of the chassis, I elected to use epoxy to hold the panels together, as the sides are made from 1/2" aluminum bar. I'm incredibly pleased with the way the project has come together and have posted pics in the APOX thread just to show off.

http://www.diyaudio.com/forums/showt...106#post276106

30th November 2003, 03:06 PM	#1
Doh diyAudio Member Join Date: Oct 2002 Location: New York	Never want to break a tap again? Nut inserts! Hello everyone, I'm currently in the process of putting together the chassis for my APOX kit. While I was shopping McMaster Carr for hole taps and drill bits, I came across some stainless steel threaded nut inserts. (McMaster Part number 98560A526) I think they are also called A-T series nut inserts. Does anyone have any experience with these? If they work, they seem like a fool-proof way of creating threaded holes without the possibility of breaking taps etc. I think that, instead of buying the very expensive installation tool, it would be possible to install these with a suitable length screw, allen wrench, and something to use as a spacer like a drill bushing (McMaster part number 8509A11, for example) Thanks in advance! Doh

4th December 2003, 06:42 PM	#2
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	Hmm...cutting thread actually isnt that big a deal..... Just make sure you use the right lubricant. For steel, brass, copper and titanium, use cutting fluid( rocol and others). For aluminium, use alcohol. If done like that you should never brake a tap......that is if you remember to buy a new one now and then....old taps are bound to brake sooner or later (mostly sooner) Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

4th December 2003, 07:08 PM	#5
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Anything that is 1/8 " , or so, is not a problem. After all you assemble it only once, right? __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

4th December 2003, 07:11 PM	#6
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	sure....once a week Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

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4th December 2003, 07:04 PM	#3
Doh diyAudio Member Join Date: Oct 2002 Location: New York	Thanks Magura, I ended up deciding that drilling a small hole was quite a bit more preferable to drilling a big one and using a nut insert. I used Peter Daniel's technique of using a drill gun, with a makeshift drill guide and the holes came out beautifully. Doh

4th December 2003, 07:05 PM	#4
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	If you chassis is Aluminium, and relatively thin skinned, the threads won't last. Inserts is the way to go in that case. Petter

4th December 2003, 07:15 PM	#7
Doh diyAudio Member Join Date: Oct 2002 Location: New York	I think the threads will be ok. I'm using 3/8" screws to hold a 4mm panel (without threads) to the back end of my APOX chassis. For most of the chassis, I elected to use epoxy to hold the panels together, as the sides are made from 1/2" aluminum bar. I'm incredibly pleased with the way the project has come together and have posted pics in the APOX thread just to show off. http://www.diyaudio.com/forums/showt...106#post276106

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