How does powder coating take drilling? Meaning, if I drill an already power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

Probably some power coat finishes are more durable than others . . .

In my experience, powder coated finishes may be drilled without risk of
chipping or flaking.

However, assuming that one side of the work will be visible, I've found that
there is a best orientation for using a Greenlee type punch. The sheet
metal around one side of the hole deforms concavely. The more concave side
should be the one that is not normally visible . . . to avoid flaking.

- Jon





From: "Paul Sanchez"
Organization: Road Runner - Texas
Newsgroups: rec.audio.tubes
Date: Fri, 28 Nov 2003 19:45:09 GMT
Subject: ?:Powder coating

How does powder coating take drilling? Meaning, if I drill an already power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

I'll second that. Powdercoating generally behaves at least as well as
paint, usually better. The same common-sense rules apply while
drilling it, though. I would recommend putting masking tape over the
area to prevent bit slippage, and use the fastest drill speed you can
to help prevent chewing up the edges of the hole.

Scott Gardner


On Fri, 28 Nov 2003 14:27:44 -0800, Jon Yaeger
wrote:

Probably some power coat finishes are more durable than others . . .

In my experience, powder coated finishes may be drilled without risk of
chipping or flaking.

However, assuming that one side of the work will be visible, I've found that
there is a best orientation for using a Greenlee type punch. The sheet
metal around one side of the hole deforms concavely. The more concave side
should be the one that is not normally visible . . . to avoid flaking.

- Jon





From: "Paul Sanchez"
Organization: Road Runner - Texas
Newsgroups: rec.audio.tubes
Date: Fri, 28 Nov 2003 19:45:09 GMT
Subject: ?:Powder coating

How does powder coating take drilling? Meaning, if I drill an already power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

Hi Paul,

How big is the hole you plan to drill? Screw-sized holes shouldn't be a
problem, but tube socket holes might flake.

Good luck,

Raymond

Paul Sanchez wrote:

How does powder coating take drilling? Meaning, if I drill an already power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

Great guys, this is quality posting
sharing your findings
no BS namecalling, etc,etc,
Rudy
happy

"Scott Gardner" wrote in message
...
: I'll second that. Powdercoating generally behaves at least as well as
: paint, usually better. The same common-sense rules apply while
: drilling it, though. I would recommend putting masking tape over the
: area to prevent bit slippage, and use the fastest drill speed you can
: to help prevent chewing up the edges of the hole.
:
: Scott Gardner
:
:
: On Fri, 28 Nov 2003 14:27:44 -0800, Jon Yaeger
: wrote:
:
: Probably some power coat finishes are more durable than others . . .
:
: In my experience, powder coated finishes may be drilled without risk of
: chipping or flaking.
:
: However, assuming that one side of the work will be visible, I've found
that
: there is a best orientation for using a Greenlee type punch. The sheet
: metal around one side of the hole deforms concavely. The more concave
side
: should be the one that is not normally visible . . . to avoid flaking.
:
: - Jon
:
:
:
:
:
: From: "Paul Sanchez"
: Organization: Road Runner - Texas
: Newsgroups: rec.audio.tubes
: Date: Fri, 28 Nov 2003 19:45:09 GMT
: Subject: ?:Powder coating
:
: How does powder coating take drilling? Meaning, if I drill an already
power
: coated chassis, will it "flake" around the edges
: when drilled? How will it react(if at all) to hole cutter?
: Many thanks
:
:
:
:
:
:

Yes, I want to do some tube socket-sized drilling, too.
Any problems forseeable?


"Raymond Koonce" wrote in message
...
Hi Paul,

How big is the hole you plan to drill? Screw-sized holes shouldn't be a
problem, but tube socket holes might flake.

Good luck,

Raymond

Paul Sanchez wrote:

How does powder coating take drilling? Meaning, if I drill an already
power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

What kind of tool do you use for tube socket holes? If it's a
conventional hole saw, try to find one that has the finest-pitch blade
you can (lots of small teeth as opposed to fewer large teeth). Other
than that, just use the fastest drill you can, and go slow. You'll
get less chipping and chewing if you press down lightly on the drill
than if you try to just blast on through.

Scott Gardner

On Sat, 29 Nov 2003 04:12:51 GMT, "Paul Sanchez"
wrote:

Yes, I want to do some tube socket-sized drilling, too.
Any problems forseeable?


"Raymond Koonce" wrote in message
...
Hi Paul,

How big is the hole you plan to drill? Screw-sized holes shouldn't be a
problem, but tube socket holes might flake.

Good luck,

Raymond

Paul Sanchez wrote:

How does powder coating take drilling? Meaning, if I drill an already
power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

i have an extra ca1630 weston/daystrom tube tester/analizer for swap.it is
in very good original condition with all tube modules,manuals,test data
booklets-considered one of the best testers ever built.this one still has
the 1957 price tag on it -$896.
looking for vintage radio/tube audio/tubes/speakers/etc
possible delivery
tnx
michael

Well, as another poster suggested, some masking tape over the area to be
cut would help. Are you cutting with a hole saw or with a punch? Be
sure to place the cutter on top of the chassis if you're punching, since
the edges of the cutout will deform downward. My objection to cutting
tube socket holes after powder coating is that the edges of the hole
will be bare metal subject to rust if you're using steel, unless you
work out a way to apply a matching finish.

Best regards,

Raymond

Paul Sanchez wrote:

Yes, I want to do some tube socket-sized drilling, too.
Any problems forseeable?


"Raymond Koonce" wrote in message
...


Hi Paul,

How big is the hole you plan to drill? Screw-sized holes shouldn't be a
problem, but tube socket holes might flake.

Good luck,

Raymond

Paul Sanchez wrote:



How does powder coating take drilling? Meaning, if I drill an already


power


coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks

"Paul Sanchez" wrote in message
...
How does powder coating take drilling? Meaning, if I drill an already
power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks


do you have to powder coat it before you drill?
why not do all the machining and then get it powder coated
then there will be no exposed edges

Doug

"doug" wrote in message
news:RY6yb.526237$9l5.192738@pd7tw2no...

"Paul Sanchez" wrote in message
...
How does powder coating take drilling? Meaning, if I drill an already
power
coated chassis, will it "flake" around the edges
when drilled? How will it react(if at all) to hole cutter?
Many thanks


do you have to powder coat it before you drill?
why not do all the machining and then get it powder coated
then there will be no exposed edges

Doug


BEST plan Doug, You can even DIY powder coating now. You bake it in a
rrgular oven but man the stuff stinks so pick up a yard sale oven you can
put out in the garage or something.