I need to deburr the inside of a 1/2" hole in a 1/8" AL "C" channel.
The hole is in the center of one leg with a 1/4" hole in the center of
the other leg. The channel is 1-1/4" Deburring the inside of the 1/4"
hole is easy.
If the volume was high enough, I would punch both holes but...
There's a hand tool for that. I don't recall its brand name. It's a hooked
scraper that pivots on a handle. It's like your dentist's tooth scraper, bu
t the pivot makes it particularly useful for deburring because the pivot mo
stly maintains a set angle of its edge against the work.
scraper that pivots on a handle. It's like your dentist's tooth scraper, but the
pivot makes it particularly useful for deburring because the pivot mostly
maintains a set angle of its edge against the work.
Sure, I have a few...they won't fit through the 1/4" hole. Remember,
this is a 1-1/4" "C" channel with the holes in the legs, opposite each
other. There is no room.
It has a rod the size of your hole and a small spring-loaded trapezoidal
blade on the tip.
Used in a drill press. On the way in, it deburrs the outside til the blade
springs in. On the way out, it deburs the inside.
I actually have one in 1/2 in, but I couldn't find it if my life depended on
Paul K. Dickman
Have you looked at the Vargus-Shaviv deburring tools? They have
replaceable swivel hooks in a red plastic handle with ground sharp edges
for the deburring. Most of them are for one edge at a time, but there
is one where the hook forms a 'V' which will debur both inside and
outside of a hole at the same time.
Look at MSC number 51538353. The photo does not look quite
right, but the description does. They may be using the same photo for
several of the tools. (And the handle has changed since I got mine. :-)
Or, MSC number 51538395.
[ ... ]
You *have* to do it from the 1/4" side? No access from the side
where the 1/2" hole is?
It is a matter of the right bits in that tool. The one you want
looks sort of like this.
so you put the right-hand end through the hole, pull it to the side so
the edge of the metal bottoms in the 'V' and move your hand in a quick
The part to the left is the ratcheted extension shank which goes
into the handle, and middle is the quick-release for changing the bits.
If you already have several of the handles, just order the hooks
for front/back deburring on holes in sheet metal.
I would go down and grab mine and photograph it to send you a
detailed look, except that I'm recovering from a fire in the shop, and
everything is rusting and hard to find.
I've seen broadheads that open up on impact. I wonder how difficult it
would be to make a deburring tool that could go through the 1/2" hole and
open up enough for deburring, then retract. Maybe spring retract and
cutting edge would extend like on as centrifugal clutch.
Whoops, misread the original post. Yup, deburring the back of the
larger hole can't be done that way. But, there are deburring tools
that will do the back of the 1/2" hole easily. I think one of
my Royal deburring tools will do it quite well.