PSA: always use grommets for through-chassis wiring

[thetragichero]

cleaning up a 68 sunn 200s that definitely spent some time in coastal air (lots of rust/corrosion)
so vain me decided to remove the transformer end bells to remove the rust and hit with black paint
that's when i discovered this:



straight up rubbed bare wire in ot secondary. others not far behind
spend the extra dollar for some grommets please!

[xtian]

Wow! Vanity pays!

[sluckey]

When that amp was new it had adequate protection...

http://sluckeyamps.com/sunn/sceptre1.jpg

[thetragichero]

just finished up a 71 sceptre and remember it having *something* there
this wasn't so much railing against conrad and co as whoever's been in here since (can cap was replaced ~2012 based on the date code)
i can say i have personally been tempted to go without when i didn't have the right size. i found they sell assortments at home depot so that is no longer an issue

[ChopSauce]

Yet another gone cheap...

A sleeve is a bare minimum - in some situation where a grommet doesn't hold (wire through a tube, for example) PVC cuts so easily ...

[Masco]

Here’s everything you need for a hole: https://www.heyco.com/Hole_Plugs/
I prefer the snap-in over the grommets

[maint_tech]

There is also caterpiller grommet for old work...
http://www.stepnco.com/products/caterpillar-grommets/

[Phil_S]

While not to be taken as a substitute for grommet or sleeve for the hole, a deburing tool should also be used. Something like this:
https://www.amazon.com/SHAVIV-Classic-D ... ooghydr-20

[SoulFetish]

While not to be taken as a substitute for grommet or sleeve for the hole, a deburing tool should also be used. Something like this:
https://www.amazon.com/SHAVIV-Classic-D ... ooghydr-20

If I'm doing hand stuff on a chassis, deburring/countersink tools are a must have; and unless it is getting machine cut, everything gets center-punched.
I just picked up this set on ebay

s-l400.jpg

Heyco has been at it for years, use their stuff all the time.

[ChopSauce]

While not to be taken as a substitute for grommet or sleeve for the hole, a deburing tool should also be used. Something like this:
https://www.amazon.com/SHAVIV-Classic-D ... ooghydr-20

For small holes, you can simply use a larger drill bit to slightly chamfer the edge. That and sandpaper.

I also have a deburring tool but do not find it that much usefull. I used to do all my metalworking without one during years, and I should be able to still do without, if I were to loose mine.

[pompeiisneaks]

I've done similar things with a drill bit but had one grab one or two times and pull through and ruin my hole (making it too big). I've become wary of that method. On the other hand, the deburring tools only take small cuts of metal and work very well imo.

~Phil

[sluckey]

I've done similar things with a drill bit but had one grab one or two times and pull through and ruin my hole (making it too big). I've become wary of that method. On the other hand, the deburring tools only take small cuts of metal and work very well imo.

~Phil

Best to twist the drill bit by hand.

[pompeiisneaks]

oh then you're using it like a deburring tool.. nice. makes sense. Since I now have some good deburring tools, I guess that's a moot point, but I do feel dumber for having tried it w/ the press

~Phil

[sluckey]

oh then you're using it like a deburring tool.. nice. makes sense. Since I now have some good deburring tools, I guess that's a moot point, but I do feel dumber for having tried it w/ the press

~Phil

I have a set of these that work well in a drill press when working on a steel chassis. Still a good idea to set the depth stop. Also work well for countersinking screw heads in either metal or wood. I'm sure they work fine in AL too, but I find it quicker to just grab a larger bit and twist by hand.

https://www.lowes.com/pd/IRWIN-5-Piece- ... 1000236049

[pompeiisneaks]

I've had this set on my wish list from amazon for a while too, but still haven't yet dropped the penny for them:

https://smile.amazon.com/dp/B07L8F2Z5M/ ... _lig_dp_it

The one I got is a simple hand deburring tool here: https://smile.amazon.com/gp/product/B07 ... UTF8&psc=1

I bought that one because my cheapo HDX home depot one broke all three tips in pretty short order, probably from the 250lb gorilla working the thing.

~Phil