I have an evaluation tomorrow over material I have not studied for over 18 months and I have unfortunately not bent any pipe in over 5 months ( including 3 months of being laid off). This saved me a lot of time going through my school books and notes to remember and more importantly, understand; I will still be going through those books to cement my grasp on all basics.
Even easier, Always bend in 10 segment bends, (no matter the radius). That will simplify the math and 10 segments always looks good anyways. Just times the radius you are looking for times .157. Them mark the pipe ten times that sum. Done. .157 came from consolidating of all the other numbers that never change. It's dropping the unnecessary repetition. Also the use of 10 makes the math easier to do in your head. Just move the decimal place over one. Makes you even faster. Smoking a math test in impossible speeds. So bending a 10" radius is marking the pipe 1.57" 10 times. But on very large radiuses you might want to add more bends. The 10 start to show.
I know this is old so hopefully you're still around. I've never used concentric bends so I'm studying up on them. Do you just pick a radius ? If not how do you know what radius to use?
excellent, the only videp I got like that. Do I need to make a 90 fold of a plasticbond pipe for underground, is the procedure similar? I mean the distance from the mark to where the bend actually occurs, do you think it affects?
By plasticbond do you mean PVC coated rigid? It seems like you are using a machine bender. The technique will be similar in that case and distance from the mark to the bend will depend on the size of your conduit. Do your best to figure it out and then practice on a scrap piece. You'll be able to do it.
@@daidegoat I was referring to metal conduit with plastic coating, something like anti-corrosion protection tape used for underground. the conduit is 2 ", something like that I thought but my doubt was because the distance of the marks is small compared to the point where the machine starts the bend. It will be time to test with one applying the procedure you show. Thank you.
He already had that piece of conduit bent that had the 12 inch radius. Then he wanted to have another piece of conduit 3 inches away from that first piece of conduit. So 12”+3” = 15 inches
Hi Franck, I am doing a project with 1/2 inch conduit. I need a corner radius of 100 inches for a nice long arc (1/4 of a circle). I have used your formulas but it seems I need to add my marks closer together than what I'm coming up with. Any tips? By the way, my math works out to a bend every 7.85 inches. Is that enough to make a smooth arc?
Good question. It could work out in half in conduit. You can also try breaking it into 15 bends of 6 degrees each - which you will have to guess a bit on. If you have some available scrap try making a 45 degree concentric and see how your math is working out. I taught myself a lot of conduit bending tricks out of necessity and experimentation. You can do the same.
It's how the math works out. The multiplier for each angle, not just 2 for a 30 degree angle is the same regardless of the size of the conduit. It's almost like, at least for me, trying to explain why gravity works. I just know from experience that it does.
In an earlier video I showed how I filed a mark where the 10 degree line on the bender is. When the conduit touches that mark it is close to 15 degrees. My other videos show why 15 is a good angle to choose for some bends, especially the three point saddle.
Excellent presentation, thank you.
My husband, an electrician with 30 years of experience, said this is an excellent explanation. Thanks
God !!!
First one see actually doing it !!!
I have an evaluation tomorrow over material I have not studied for over 18 months and I have unfortunately not bent any pipe in over 5 months ( including 3 months of being laid off). This saved me a lot of time going through my school books and notes to remember and more importantly, understand; I will still be going through those books to cement my grasp on all basics.
Thanks Frank, was exactly what I needed.
Thanks for sharing
Lot of real world applications this bend could be useful for
Even easier, Always bend in 10 segment bends, (no matter the radius). That will simplify the math and 10 segments always looks good anyways. Just times the radius you are looking for times .157. Them mark the pipe ten times that sum. Done.
.157 came from consolidating of all the other numbers that never change. It's dropping the unnecessary repetition.
Also the use of 10 makes the math easier to do in your head. Just move the decimal place over one. Makes you even faster.
Smoking a math test in impossible speeds. So bending a 10" radius is marking the pipe 1.57" 10 times.
But on very large radiuses you might want to add more bends. The 10 start to show.
Thanks I’m going to try that today. I have to make a hoop with an 18 inch radius out of 1 inch conduit. Thank you for your tip.
@@theloneviking9145 it's times .157 times the radius, then mark the pipe 10 times that sum. I corrected my typo. I'm good at math, suck at grammar.
I know this is old so hopefully you're still around. I've never used concentric bends so I'm studying up on them. Do you just pick a radius ? If not how do you know what radius to use?
excellent, the only videp I got like that. Do I need to make a 90 fold of a plasticbond pipe for underground, is the procedure similar? I mean the distance from the mark to where the bend actually occurs, do you think it affects?
By plasticbond do you mean PVC coated rigid? It seems like you are using a machine bender. The technique will be similar in that case and distance from the mark to the bend will depend on the size of your conduit. Do your best to figure it out and then practice on a scrap piece. You'll be able to do it.
@@daidegoat I was referring to metal conduit with plastic coating, something like anti-corrosion protection tape used for underground. the conduit is 2 ", something like that I thought but my doubt was because the distance of the marks is small compared to the point where the machine starts the bend. It will be time to test with one applying the procedure you show. Thank you.
Nice video.
How do you get the radius measurement? The 15 inches.
I made it up for the video. I needed a measurement to begin with.
He already had that piece of conduit bent that had the 12 inch radius. Then he wanted to have another piece of conduit 3 inches away from that first piece of conduit. So 12”+3” = 15 inches
Hi Franck, I am doing a project with 1/2 inch conduit. I need a corner radius of 100 inches for a nice long arc (1/4 of a circle). I have used your formulas but it seems I need to add my marks closer together than what I'm coming up with. Any tips? By the way, my math works out to a bend every 7.85 inches. Is that enough to make a smooth arc?
Good question. It could work out in half in conduit. You can also try breaking it into 15 bends of 6 degrees each - which you will have to guess a bit on. If you have some available scrap try making a 45 degree concentric and see how your math is working out. I taught myself a lot of conduit bending tricks out of necessity and experimentation. You can do the same.
@@daidegoat Thanks very much! conduit is pretty inexpensive so time to do some hands on learning! Great video. Keep 'em coming.
Nice was that 2 3/8 for all size pipe
Hey, what about 3/4” conduit?
this is 3/4 conduit
Great explanation, only question is does the multiplier 2 apply to all sizes of conduit?
It's how the math works out. The multiplier for each angle, not just 2 for a 30 degree angle is the same regardless of the size of the conduit. It's almost like, at least for me, trying to explain why gravity works. I just know from experience that it does.
Hello, so where does the 15 come from?
In an earlier video I showed how I filed a mark where the 10 degree line on the bender is. When the conduit touches that mark it is close to 15 degrees. My other videos show why 15 is a good angle to choose for some bends, especially the three point saddle.
Maybe take a few more takes next time. This was hard to listen to