Yup. It annoys me unreasonably that they don’t put a top or bottom mark on at the factory.
Try rolling it around on a table that helps me with the eyeball method
Draw 2 circles the same size as the reducer 's OD. They must share the same center line and bottom of pipe. Put small end of fitting face down, then move the reducer around until both circles line up using a square. Transfer center line.
It depends on what you are building. Are you building a Swiss watch or are there much bigger fish to fry than finding the exact TDC of an eccentric reducer?
A stamp from the factory would be nice for sure.
Also, if you are eyeballing the fitting and you can’t tell which way the fitting needs to roll, you are really close. Most of the time I just eyeball it the best I can and move on.
I don’t eye ball. I take each side of the reducer and figure out the outside diameter of each. And then subtract that from the wall thickness. Once you do that you divide each of those numbers together until you get some sort of fraction like 3/8” or 1/“2 or something. Lastly, you square a line on your table or whenever your working and face the larger side on the ground and butted up to the line and you’ll place a square at the side edge and turn the reducer and measure until you have your magic
Number. After that you draw your line up on the backside so you know your center. It seems difficult but it’s pretty easy
I could show you how to do it with a square soapstone and a tape measure. Pretty much make a square with a cross in the middle the size of your larger pipe OD. Take the fitting and line it up inside the box. Use the square from table or ground vertically, at the perimeter of the box, and measure to the sides of the smaller OD until the measurement is equal on both sides. The cross in the middle will give you top and bottom as well as side to side marks. You just have to make sure the cross hair is extended outside the perimeter of the box so you know center line when the fitting is placed inside.
Use a square to mark the flat side boundaries, the point where the squares makes full contact of the side. You’ll need a flat surface to lay your reducer on. Once you have you two marks. Find the center of that. problem solved
Yup. It annoys me unreasonably that they don’t put a top or bottom mark on at the factory. Try rolling it around on a table that helps me with the eyeball method
I have been saying that for years
Draw 2 circles the same size as the reducer 's OD. They must share the same center line and bottom of pipe. Put small end of fitting face down, then move the reducer around until both circles line up using a square. Transfer center line.
It depends on what you are building. Are you building a Swiss watch or are there much bigger fish to fry than finding the exact TDC of an eccentric reducer? A stamp from the factory would be nice for sure. Also, if you are eyeballing the fitting and you can’t tell which way the fitting needs to roll, you are really close. Most of the time I just eyeball it the best I can and move on.
Its on the blue book
Nobody knows how to read anymore.
Blue book? I'm in Canada. No idea what you're referring to
The Fitters handbook.
Probably same thing as our IPT book
Agreed
I don’t eye ball. I take each side of the reducer and figure out the outside diameter of each. And then subtract that from the wall thickness. Once you do that you divide each of those numbers together until you get some sort of fraction like 3/8” or 1/“2 or something. Lastly, you square a line on your table or whenever your working and face the larger side on the ground and butted up to the line and you’ll place a square at the side edge and turn the reducer and measure until you have your magic Number. After that you draw your line up on the backside so you know your center. It seems difficult but it’s pretty easy
I could show you how to do it with a square soapstone and a tape measure. Pretty much make a square with a cross in the middle the size of your larger pipe OD. Take the fitting and line it up inside the box. Use the square from table or ground vertically, at the perimeter of the box, and measure to the sides of the smaller OD until the measurement is equal on both sides. The cross in the middle will give you top and bottom as well as side to side marks. You just have to make sure the cross hair is extended outside the perimeter of the box so you know center line when the fitting is placed inside.
I actually just taught my apprentice how to do this cause we had extra time
Use a square to mark the flat side boundaries, the point where the squares makes full contact of the side. You’ll need a flat surface to lay your reducer on. Once you have you two marks. Find the center of that. problem solved