Steel Grind
 

Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

Steel Grind
 

On Friday, 26 January 2018 19:45:57 UTC, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

For steel, silicon carbide. Alox is much slower, and silicon dioxide best used on hard cheese rinds only. Diamond tends to be very variable. Tungsten carbide is good stuff.


NT

Steel Grind
 

How do the vitrious silicon carbide bits hold up ?


wrote:
On Friday, 26 January 2018 19:45:57 UTC, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

For steel, silicon carbide. Alox is much slower, and silicon dioxide best used on hard cheese rinds only. Diamond tends to be very variable. Tungsten carbide is good stuff.


NT

Steel Grind
 

Once upon a time on usenet BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

I'd use the Dremel CBN (Cubic Boron Nitride) wheels. I bought a few to test
them and they are great for jobs with steel.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)

Steel Grind
 

On Friday, January 26, 2018 at 2:45:57 PM UTC-5, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

Can you just re-cut the end?
Maybe a step drill bit, or a conical bit.
(A dremel sounds a bit wimpy for the job, unless it's thin walled
SS.)

George H.

Steel Grind
 

I may not understand exactly what you mean. When plumbers and
electrician cut pipe or conduit they use a conical pipe reamer or for
lighter pipe a flat vee shaped one.
CP

Steel Grind
 

In article ,
says...

On Friday, January 26, 2018 at 2:45:57 PM UTC-5, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

Can you just re-cut the end?
Maybe a step drill bit, or a conical bit.
(A dremel sounds a bit wimpy for the job, unless it's thin walled
SS.)

George H.

Did anyone mention a tapered reamer ? The pipe threading machines
usually have them built in.

Steel Grind
 

On Saturday, February 17, 2018 at 5:06:29 PM UTC-5, Ralph Mowery wrote in sci.electronics.repair:
In article ,
says...

On Friday, January 26, 2018 at 2:45:57 PM UTC-5, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

Can you just re-cut the end?
Maybe a step drill bit, or a conical bit.
(A dremel sounds a bit wimpy for the job, unless it's thin walled
SS.)

George H.

Did anyone mention a tapered reamer ? The pipe threading machines
usually
have them built in.

Do they work on rigid? pipe?