He finally decided to weather the awful process of my 'math' usage, and sunnuva'gun if he didn't ask me later if I would go over some of the fine points with him , etc. I resulted with a 6.5" offset. I don't have a ton of experience with this under my belt, so feeding off of your hub has been very nourishing. Dan Harmon (author) from Boise, Idaho on February 02, 2015: Well, it made sense to me, too. I've never had to build odd offsets into a cable tray, but have done plenty of big pipe and have more than a few come back later and ask if I could teach them how to avoid costly mistakes. conduit bending quotes quotesgram 
) Current Tools: 750/751 Current Tools: 77 Current Tools: 747 Gardner Bender: Big Ben Gardner Bender: Sidewinder Gardner Bender: Electric Sidewinder Gardner Bender: B2000 Cyclone Gardner Bender: Ultra Eegor Gardner Bender: B300 Series Greenlee: Hand Benders Greenlee: 1800/1801 Greenlee: 1818 Greenlee: 555Greenlee: 854DX Greenlee: 855GX Greenlee: 881 Greenlee: 884/885 Ideal: Hand Benders Klein: Hand BendersQuickBend Multiple Bends Layout multiple bends on a single stick of conduit. Offset to ObstructionOffset from ObstructionThree Point Saddle Four Point Saddle 90 Bend, Kick Kick with 90 Place a cut mark for those rare occasions that you need to cut and thread the conduit before bending. Flip bends around. Graphic representation of where the bend/cut will layout on a stick of conduit. Bend layouts are based on your benders centerline radius, deduct, and gain. Toggle 'Measure to Centers' to help line up conduits when working on raceways with multiple conduit sizes.QuickBend includes a protractor level which is easily accessible and can be Zeroed by a simple tap.QuickBend allows you to pick between either form of measurements, imperial (inches) or metric (cm).QuickBend's QuickCheck indicates if bends are impossible by a subtle change of turning the measurements and text red.QuickBend's center-line radius algorithm is especially useful when bending conduit that is larger than 1 inch and bends that exceed 30 degrees.If you'd like to make any suggestions or just want to say 'hi' please e-mail me at rigidpro@outlook.com, Parallel Kick Multiple Parallel Kicks Matching Bends Offset Matching Bend Kick Performance Improvements Improved GUI Milwaukee Hand Benders Greenlee 882 Hand Benders can now select rigid conduit Bug Fixes. We just got this bender about 6 months ago and I'm always the one running to the shop to bend pipe, If I can get it down to the science that I know it is, I would b happy :), I'm still having a little trouble understanding the calculations probably because when in high school I finished all my math early and opted against trig so I could talk to all the honeys in business math, now look where I'm at!! And thanks for the compliment; if you're happy with the hub it must be of some use to you. Brought back memories from trig. Thanks for the comment - it's nice to know I was able to be of assistance. But you can block it in and print it that way. I'm glad you liked it - it's information few electricians know anything about, but can certainly learn.
Offering you the most accurate measurements using the center-line radius algorithm based upon the bender that you're using. Copyright 2022 Apple Inc. All rights reserved. Dan Harmon (author) from Boise, Idaho on December 14, 2013: Not bad, although a few of additions need to be made.
Answer: If you are asking what the angles are, they can be anything that adds up to 180 degrees. going to school for conduit bending with union and learning about shrink and gain. Congrats on taking all the thinking out of my job. I often use the trig functions to design pipe work & am pretty lost otherwise . I'd eye off the 90 right, but I need a banger at starting height. Answer: Not in the sense of the formulas given here. sheet metal offsets create fabrication line tutorials multiplier conduit That's always good to hear. Your calculator will give you the sine, cosine, and tangent of any angle. If I have misunderstood or just didn't come with something you can use, please let me know and I'll try again. I guess my almost perfect pipe will be getting outfitted with a nice new coupling lol :) at least it wasn't too small.. 
There is no deduct except when doing 90 degrees on a hand bender. From the angle, using formulas below, you can get the relationships between these lengths. Thank you :o). Thanks for the explanation, that makes sense. We know that A = 4" and angle d = 22.5. Of course it was all about the basic trig which many learned to be afraid of way back when in some classroom or other. Hahahahah.
In the final analysis it will always be necessary to round off and simply choose the nearest fractional equivalent to the calculated decimal figure. I use the bender standing upright it has the stand and the little plate thing it slides along as its being bent. 
And now that we have smartphones, the calculator isn't just cheap; it's free. Most everything has been converted to memory. electrical conduit radius formulas offset bend allowance toolnotes I have been taught this in class and doubted I would ever have to approach conduit bending with trigonometry but after having some difficulty bending large conduit today here I am! I applied this to bending rigid ocal, and it got me pretty darn close. GREAT WRITE UP!!! miter piping
Finally, it is very easy to over or under bend pipe at ten degrees. Many local terms are just that - local, and aren't used country wide. Thank you! Im a 20+ year electrician. See https://dengarden.com/home-improvement/a-conduit-b for complete instructions for saddles. This is our first mark for the 3/4" pipe. If you don't find what you are looking for among my other articles, leave a comment and Ill consider addressing your question in future articles; the whole series is a work in progress. I only bent conduit by eye and a tape measure.Could you give me some advice. Better than a couple of the paid apps for quick calculations. Answer: Minimums are a function of the bender being used and cannot be reduced. The geometry of a triangle provides formulas useful for many conduit bends. You guys hit a home run with this app! If your using a hand, dunno why you would cuz it will look like crap, but it will be stamped on the side. Is there a formula for that? After they master these, I will then show them more bending techniques and formulas. SEOshortcuts from San Francisco CA on August 21, 2010: Holy moly - you are an artist with this hub! Memorizing these simple formulas can make the bending of large conduit much easier. This app works great and is very accurate. Side B = 4" / tan(22.5) or 9.65". None of the multipliers used in offsets are conduit material dependent, nor do they depend on the size of the conduit. Note that making concentric bends requires using some additional math not discussed in this article. What is the shrink per inch of rise for 10 and 60 degree bends ? I'll use this new knowledge when teaching my reluctant math students. Question: Whats the formula to indicate when to start your kick on a 90 and loss? 60 degree rise per inch = .57". The length of side A is the tangent of angle (d) times the length of side B.
1/8=.125, 2/8 (or 1/4)=.25, 3/8=.375 and so on. The math formulas we will be using are sine, cosine, and tangent. tecnostamp Dan Harmon (author) from Boise, Idaho on October 03, 2011: I'm sorry, I'm not familiar with that term - it isn't used in my area. ), an inaccurate or poorly placed protractor, etc. Depending on the state you live in, you may be required to go to school to learn much of this, as well as working as an apprentice learning the trade. 1/2" pipe Mark 1 at 24", Mark 2 at 36" (offset height, which is 6" x offset multiplier, which is the cosecant of bending angle, which is csc(30), which is 2, therefor 12" between marks) Now, for the 3/4" pipe, we take the O.D of the pipe, which we'll say is an inch and an eighth, and we add it to the distance we want between pipes, which is 1". From my understanding I'm going to learn about electrician tools, wiring, how to wire up motors, PLC n controls, power distribution, electric codes, blueprints schematics, electronic component circuits, a little construction, and how to bend conduit. The "loss" is then 7-4.5, or 2.5". My boss said there was no formula but I know there is.. Maybe greenlee has multipliers that are used for certain benders.
They keep saying it so close with my answers. Pay for the premium version. I always start with the basic bends first. Saddles are used to route conduit around an obstruction. and all of these things must be checked carefully. When bending a 3 bend saddle , my mark A is 30 inches and im crossing a 3 inch object then what are my measurements for mark B and C. Dan Harmon (author) from Boise, Idaho on February 23, 2014: 10 degrees rise per inch = .08". Dan Harmon (author) from Boise, Idaho on October 14, 2010: You are more than welcome. But thanks all the same.
Question: Is there a formula for concentric conduit bending? tecnostamp And if the order of bend is A,B,C the bender should be reversed after the first bend - normally I will bend B,A,C and reverse the bender after the A bend. Well, it's my first non-90 bend, and I'll be "winging it" in a second here. It is critical that the pipe be really horizontal, at 0 degrees; check with a level. He has extensive experience in most areas of the electrical trade. My own memory aid is this: where the hypotenuse is the longest side, the opposite is the side opposite the angle, and the adjacent is the side that touches the angle but is not the hypotenuse. Great info. - Joslin ( Detroit ). This is all assuming that the pipe is a pencil line, not a 3-dimensional object, which we know is not true. I'm sure the problem is in the bending process - the wrong angle (are you using the bender on it's side and measuring with the rod that comes out to indicate bend? For example, if you had from left to right, 1/2" pipe and a 3/4" pipe, the offset on your 1/2" starting at 24" and you were bending 30 degree bends for a 6" offset, and you wanted 1" between your pipes, you'd make the following marks, measuring from bottom up. Using these formulas will enable the electrician to bend very nearly any angle he or she wants to. Julie Burke from Alaska on October 04, 2010: I didn't even realize that trig would be pertinent to bending conduit! deduct 6 inches for a 90. but i know i wouldn't use them in the feild. The angle "d" is the angle at which the conduit is bent. Within an 1/8th of an inch is almost always good enough; if you need to be closer than that you'll probably have to tweak it some anyway. Many protractors are very difficult to read exactly what you want, and 1 or 2 degrees off is very common. I would have more trouble remembering Sohcahtoa than I would the formulas! And, yes it's an example in ugly's from the 2011 edition pg. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
