CattleRustler

Can anyone point me to a metal tapping kit that will include the sizes I need for the following

- Standard pc case screws (like the ones that hold on panels, and psu mounts)
- Standard pc mobo stand-offs (yeah, those )

I am looking around on mcmaster but I am not sure with this.
I will need to tap light guage aluminum, but if a kit can do both steel and aluminum, that would be great

thanks for your help

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radodrill

I believe most of the screws for PCs are 6-32 thread; TBH just about any tap will cut threads in steel, you just have to be sure to pre-drill the hole at the correct size.

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CattleRustler

ok thanks rado +

can anyone confirm 6-32 for both of those or are they different sizes. And what is the pilot hole size for both of these? (noob at this, sorry)

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radodrill

Just double checked; the 2 common threads in PCs are 6-32 and 4-40


Here's a link to a tap & drill table

oftentimes individual taps at Lowe's will include the correct drill.

the 4-40 uses a #43 drill; but a 5/64" may work as well
6-32 uses a #36 drill; 7/64 may be a valid alternate.

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Project RAD GT

SR-1/2 radobases for Crazy Carl's Antec 900 mod

CattleRustler

wicked info - thanks man

any confirmations from others would be great
(no offense rado, just wanna double check - measure twice cut once, as they say )

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radodrill

none taken; it never hurts to get a second opinion or to test stuff out on scrap material before doing it for real.

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Project RAD GT

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Hutkikz

He's spot on.
The only thing i would add is some cutting wax for alum.

CattleRustler

great thanks + rep

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iandh

Pick yourself up a can of dark cutting oil, there's a million brands. It costs a couple bucks, but a single drop on your tap before you cut will make your taps last 100X longer, greatly reduce the chance of breakage, and make a cleaner, more precise thread. My personal favorite is TapMagic, works well for steel and aluminum, but they have an aluminum formulation as well.

USE CUTTING FLUID!!!!!!

(sorry just had to make sure)

CattleRustler

thanks
+ rep

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[Current Project] The Intelligence
[Completed Project] Jessie's Gumdrop (6/08 MOTM 2nd place)
[Completed Project] Cable Management - CM Cosmos 1000

Make your Worklogs using WorklogCreator <--click here!! (v 1.0.0.7)
WorklogCreator is an app that lets you visually build worklogs quickly and easily, then generates the postable output with the click of a button!

3DM06 Score:11377 11921 14933