Drilling out chassis revits

5/8/2011 6:39:33 PMMitch

Hello to everyone,

I have been working on a play again break again radio with Warren for what seems like years of birthdays now. It is now broke again.

Last night the E caps smoked and leaked oil. The cap assembly is a paper housing which has a revited metal base to the chassis, there are 3 caps in the unit.

I need help/ideas on how to drill out the revits under the chassis and not get metal filings into the circuity, the components and wiring are very dense, that is why i did not change out the unit yet.

Thanks
Mitch

5/8/2011 8:04:40 PMDaniel

Hi Mitch,

When I have to drill out rivets in tight quarters I use electrical tape or masking tape pieces on the inside chassis side of the rivet. The sticky tape catches the metal filings from the drilling so they don't scatter all over the inside of the chassis. Drill slowly in stages and watch what is happening. Put more tape in the drilled area if necessary to catch the metal filings. If possible, use a very short drill bit or set it deep into the drill chuck to reduce the chances of accidentally drilling into a component. When you break the rivet, carefully pull up the tape and the metal filings will be stuck to it.

If the old caps are on the top of the chassis consider just leaving them there and wire replacement electrolytics inside the chassis. Modern replacements are a fraction the size of the old electrolytics. If the old caps are inside and taking up needed space maybe you could clip the metal band often used to strap the electrolytics to the chassis.

:Hello to everyone,
:
:I have been working on a play again break again radio with Warren for what seems like years of birthdays now. It is now broke again.
:
:Last night the E caps smoked and leaked oil. The cap assembly is a paper housing which has a revited metal base to the chassis, there are 3 caps in the unit.
:
:I need help/ideas on how to drill out the revits under the chassis and not get metal filings into the circuity, the components and wiring are very dense, that is why i did not change out the unit yet.
:
:Thanks
:Mitch
:

5/8/2011 8:06:37 PMMarv Nuce

If you happen to have some refrigerator magnets or the really powerful one fron an old hard drive, should catch most of the cuttings. If the end you're going to drill is flat, center punch to keep the bit from walking, otherwise go slow with min pressure, otherwise it'll start to spin with the bit. Use a bit slightly larger than rivet diameter. A Dremel and cut-off wheel may be another approach. If space is really limited use an old worn wheel with a smaller diameter.

marv

5/8/2011 8:09:53 PMEdd

Sir Mitch . . . . .

Guessing that your first responses will probably be for you to use a “maggit”

As for my procedure:

This initially calls for hitting your great grand kids cache of modeling clay. Or Mamma Cass’s similar like stuff that she uses in holding flower stems, down at the bottom of an arrangement.

The drill size of choice is usually around the 1/8 in size and then you position the drill upon the rivet and possibly have to prick punch the domed top in case it is not a hollow rivet.

Then a healthy blob of rounded clay dome is placed on the bottom of the rivets chassis side and a like amount covering the top of the rivet and encircling the drill bit at the rivet top.

Then one drills and presses down on the top blob with thumb and 3 fingers to keep it on the rivet top.

That then catches all of your drilling chaff as you do a few final press ins and then rotating in fresh clay to enact a couple of other final capturing daubs.

73's de Edd

:If you happen to have some refrigerator magnets or the really powerful one fron an old hard drive, should catch most of the cuttings. If the end you're going to drill is flat, center punch to keep the bit from walking, otherwise go slow with min pressure, otherwise it'll start to spin with the bit. Use a bit slightly larger than rivet diameter. A Dremel and cut-off wheel may be another approach. If space is really limited use an old worn wheel with a smaller diameter.
:
:marv
:
::Hello to everyone,
::
::I have been working on a play again break again radio with Warren for what seems like years of birthdays now. It is now broke again.
::
::Last night the E caps smoked and leaked oil. The cap assembly is a paper housing which has a revited metal base to the chassis, there are 3 caps in the unit.
::
::I need help/ideas on how to drill out the revits under the chassis and not get metal filings into the circuity, the components and wiring are very dense, that is why i did not change out the unit yet.
::
::Thanks
::Mitch
::
:
:

5/8/2011 8:49:20 PMMitch

:
:
:
:

:
:
:
:
:
:
:
:
:Sir Mitch . . . . .
:
:
:
:
:Guessing that your first responses will probably be for you to use a “maggit”
:
:
:
:As for my procedure:
:
:
:
:This initially calls for hitting your great grand kids cache of modeling clay. Or Mamma Cass’s similar like stuff that she uses in holding flower stems, down at the bottom of an arrangement.
:
:
:The drill size of choice is usually around the 1/8 in size and then you position the drill upon the rivet and possibly have to prick punch the domed top in case it is not a hollow rivet.
:
:
:Then a healthy blob of rounded clay dome is placed on the bottom of the rivets chassis side and a like amount covering the top of the rivet and encircling the drill bit at the rivet top.
:
:
:Then one drills and presses down on the top blob with thumb and 3 fingers to keep it on the rivet top.
:
:
:That then catches all of your drilling chaff as you do a few final press ins and then rotating in fresh clay to enact a couple of other final capturing daubs.
:
:
:
:
:
:
:
:
:
:
:73's de Edd
:
:
:

:

:
:
:
:
::If you happen to have some refrigerator magnets or the really powerful one fron an old hard drive, should catch most of the cuttings. If the end you're going to drill is flat, center punch to keep the bit from walking, otherwise go slow with min pressure, otherwise it'll start to spin with the bit. Use a bit slightly larger than rivet diameter. A Dremel and cut-off wheel may be another approach. If space is really limited use an old worn wheel with a smaller diameter.
::
::marv
::
:::Hello to everyone,
:::
:::I have been working on a play again break again radio with Warren for what seems like years of birthdays now. It is now broke again.
:::
:::Last night the E caps smoked and leaked oil. The cap assembly is a paper housing which has a revited metal base to the chassis, there are 3 caps in the unit.
:::
:::I need help/ideas on how to drill out the revits under the chassis and not get metal filings into the circuity, the components and wiring are very dense, that is why i did not change out the unit yet.
:::
:::Thanks
:::Mitch
:::
::
::
:
:
Thanks everyone,

I am going to go with the combination of silly puddy and earth magnets.

Will let you know about the results.

Mitch

5/8/2011 10:09:47 PMEdd

That there silly puddy might be tenacious enough, better to stick with modeling clay.
Edd
::
::
::
::

::
::
::
::
::
::
::
::
::That thar' silly puddy might NOT be TENACIOUS enough, better to stick with modeling clay.

Edd

::
::
::
::Sir Mitch . . . . .
::
::
::
::
::Guessing that your first responses will probably be for you to use a “maggit”
::
::
::
::As for my procedure:
::
::
::
::This initially calls for hitting your great grand kids cache of modeling clay. Or Mamma Cass’s similar like stuff that she uses in holding flower stems, down at the bottom of an arrangement.
::
::
::The drill size of choice is usually around the 1/8 in size and then you position the drill upon the rivet and possibly have to prick punch the domed top in case it is not a hollow rivet.
::
::
::Then a healthy blob of rounded clay dome is placed on the bottom of the rivets chassis side and a like amount covering the top of the rivet and encircling the drill bit at the rivet top.
::
::
::Then one drills and presses down on the top blob with thumb and 3 fingers to keep it on the rivet top.
::
::
::That then catches all of your drilling chaff as you do a few final press ins and then rotating in fresh clay to enact a couple of other final capturing daubs.
::
::
::
::
::
::
::
::
::
::
::73's de Edd
::
::
::

::

::
::
::
::
:::If you happen to have some refrigerator magnets or the really powerful one fron an old hard drive, should catch most of the cuttings. If the end you're going to drill is flat, center punch to keep the bit from walking, otherwise go slow with min pressure, otherwise it'll start to spin with the bit. Use a bit slightly larger than rivet diameter. A Dremel and cut-off wheel may be another approach. If space is really limited use an old worn wheel with a smaller diameter.
:::
:::marv
:::
::::Hello to everyone,
::::
::::I have been working on a play again break again radio with Warren for what seems like years of birthdays now. It is now broke again.
::::
::::Last night the E caps smoked and leaked oil. The cap assembly is a paper housing which has a revited metal base to the chassis, there are 3 caps in the unit.
::::
::::I need help/ideas on how to drill out the revits under the chassis and not get metal filings into the circuity, the components and wiring are very dense, that is why i did not change out the unit yet.
::::
::::Thanks
::::Mitch
::::
:::
:::
::
::
:Thanks everyone,
:
:I am going to go with the combination of silly puddy and earth magnets.
:
:Will let you know about the results.
:
:Mitch
:

5/10/2011 9:01:52 AMcodefox

I have two other methods:

1. use a dremel to grind down the rivet on the top and the other end will easily plop out with a little tap with an awl.

2. Remove the tubes. Sharpen up a crappy old chisel and pound the head of the rivets off.