carbide burrs

[caterpillar guy]

I'm looking for a 3/4 carbide burr for opening up welded holes. What is the real difference between a 10.00 burr and a 50.00or 100.00 dollar burr is there that much of a quality difference? I already have a 1/2 inch burr I got for something like 5or10 dollars a few years ago that has worked well for what I use it for now I need a 3/4 they work better than trying to drill out welded up holes without breakage also when through the hole is still the size needed like a drill bit would do. A tapered one like as they describe it a tree shape would work easiest for this. Thanks

 

[Janicholson]

Do a web search for Bridge Reamers. It might be what you are looking for. Jim

 

[caterpillar guy]

Jim would not the variation from the weld break the reamers versus the burr to smooth out the weld either first or to complete the hole from the weld. I used a 7014 rod so not a tough alloy type rod used for this. I looked at your reamers and thus the question posed.

 

[guido]

I'm looking for a 3/4 carbide burr for opening up welded holes. What is the real difference between a 10.00 burr and a 50.00or 100.00 dollar burr is there that much of a quality difference? I already have a 1/2 inch burr I got for something like 5or10 dollars a few years ago that has worked well for what I use it for now I need a 3/4 they work better than trying to drill out welded up holes without breakage also when through the hole is still the size needed like a drill bit would do. A tapered one like as they describe it a tree shape would work easiest for this. Thanks

How about one of these


Guido.

 

[Janicholson]

Jim would not the variation from the weld break the reamers versus the burr to smooth out the weld either first or to complete the hole from the weld. I used a 7014 rod so not a tough alloy type rod used for this. I looked at your reamers and thus the question posed.

A 3/4 inch burr in a hole, if held solid in a gear drill press, would work. If a pilor hole was drilled prior to finla finishing (using a 3/8 spot weld drill) I think it would work well. Hand held not a chance. Guido poses the same tool. Jim

 

[caterpillar guy]

I didn't weld the holes shut just built up around the side so lots of variation along the sides reason I am questioning the reamer . Thought a tapered burr would just let me open the holes up and smooth them out on the sides to either drill them or just fit the pins.
Thanks for the ideas.

 

[guido]

I didn't weld the holes shut just built up around the side so lots of variation along the sides reason I am questioning the reamer . Thought a tapered burr would just let me open the holes up and smooth them out on the sides to either drill them or just fit the pins.
Thanks for the ideas.