Enlarging a bushing hole?

I find myself having to enlarge a bushing's ID by 1/16ths to 3/8ths.
My concern is I don't know how to insure the 3/8" bit is aligned with
the axis of the hole. Centered is good, but I'm more concerned with
the alignment.
Suggestions? - Mike

"Michael Horowitz" wrote in message
...
I find myself having to enlarge a bushing's ID by 1/16ths to 3/8ths.
My concern is I don't know how to insure the 3/8" bit is aligned with
the axis of the hole. Centered is good, but I'm more concerned with
the alignment.
Suggestions? - Mike

Chuck a rod in the drillpress the same size as the existing hole. Slip the
bushing on the rod and clamp it to the table. Replace the rod with your new
drill or reamer. Make shavings.

Rich S.

If you have a lathe or access to one it's simple. Just chuck the
bushing in the lathe with the drill bit mounted on the right side...
can't think of the name of that part..

John

Michael Horowitz wrote:
I find myself having to enlarge a bushing's ID by 1/16ths to 3/8ths.
My concern is I don't know how to insure the 3/8" bit is aligned with
the axis of the hole. Centered is good, but I'm more concerned with
the alignment.
Suggestions? - Mike

On Aug 27, 7:59 pm, John Ammeter
wrote:
If you have a lathe or access to one it's simple. Just chuck the
bushing in the lathe with the drill bit mounted on the right side...
can't think of the name of that part..
---------------------------------------------------------------------

That'd be the Wifferdoodle. (Although some folks call it the Tail
Stock.)

-Bob

wrote:
On Aug 27, 7:59 pm, John Ammeter
wrote:
If you have a lathe or access to one it's simple. Just chuck the
bushing in the lathe with the drill bit mounted on the right side...
can't think of the name of that part..
---------------------------------------------------------------------

That'd be the Wifferdoodle. (Although some folks call it the Tail
Stock.)

-Bob

There are a few 4 letter words associated with the tail stock when
you do one of three things:

1) commence drilling before locking the tail stock down.
2) smack your hand on either a live end or dead end during set up.
3) use a dead end and comment aloud about dead ends and your wife
when she is standing there.

I have done the first two and know someone who has done the third.

Dan, U.S. Air Force, retired

On Aug 27, 8:51 pm, "Rich S."
wrote:
"Michael Horowitz" wrote in message


Chuck a rod in the drillpress the same size as the existing hole. Slip the
bushing on the rod and clamp it to the table. Replace the rod with your new
drill or reamer. Make shavings.

Rich S.

Thank you Rich - Mike

On Aug 28, 12:51 am, "Rich S."
wrote:
"Michael Horowitz" wrote in message

...

I find myself having to enlarge a bushing's ID by 1/16ths to 3/8ths.
My concern is I don't know how to insure the 3/8" bit is aligned with
the axis of the hole. Centered is good, but I'm more concerned with
the alignment.
Suggestions? - Mike

Chuck a rod in the drillpress the same size as the existing hole. Slip the
bushing on the rod and clamp it to the table. Replace the rod with your new
drill or reamer. Make shavings.


If it is a sintered bronze bushing machining will close off
the pores and prevent lubrication from reaching the shaft.
The people who make sintered busings say there is a
way to re-open them, but I never asked how.

If it is a solid metal bushing then no problem.

--

FF

wrote in message oups.com...
On Aug 27, 7:59 pm, John Ammeter
wrote:
If you have a lathe or access to one it's simple. Just chuck the
bushing in the lathe with the drill bit mounted on the right side...
can't think of the name of that part..
---------------------------------------------------------------------

That'd be the Wifferdoodle. (Although some folks call it the Tail
Stock.)

-Bob


Hmmmm, and I thought it was a tale stock

;-)

This is not an aircraft repair.

I've got a piece of 4130 tubing, about 3" long, 3/4" dia and I'm
trying to slip it over a like size tubing.
Just because I'm trying to let friction do the holding, I'd like to
remove as little metal from the external sleeve as possible.
I made a slot in the tube and expanded it slightly with a wedge.
I though maybe heating the insides would cause it to open like a clam.

I could wedge it open and apply heat, thus deforming the tube.

Other suggestions? - Mike

Go see if your local muffler shop has a tube expander this small.

Jim

--
"If you think you can, or think you can't, you're right."
--Henry Ford



"Michael Horowitz" wrote in message
...
This is not an aircraft repair.

I've got a piece of 4130 tubing, about 3" long, 3/4" dia and I'm
trying to slip it over a like size tubing.
Just because I'm trying to let friction do the holding, I'd like to
remove as little metal from the external sleeve as possible.
I made a slot in the tube and expanded it slightly with a wedge.
I though maybe heating the insides would cause it to open like a clam.

I could wedge it open and apply heat, thus deforming the tube.

Other suggestions? - Mike