Accurate Stubs
How to make a 90° bend with EMT,
also called a stub up, or an accurate stub.
Words to know:
Take up : amount of conduit to bend.
Height stub up: the distance from the end of conduit to the bottom of the 90° bend.
1.Determine the height of the offset/stub up, for this example it is 11" (Figure 1).
2.For this example a 1/2" pipe will be used, so subtract 5" from the height of the offset.
3.Mark the conduit at height of 5" (make the mark all of the way around the conduit so it can be seen when it is in the bender).
4.Place the bender on the ground with the handle in the air.
5.Slide the pipe into the bender, align the mark with point B on the bender. There may be an arrow or star on the bender indicating the mark that need to line up with point B on the stub should be to the right of point B (Figure 2).
6.Place foot on the back end of the pipe.
7.Place other foot on the back of the bender.
8.Pull back on the handle until you achieve a 90° bend for the stub. The handle should be at about 30° from the floor. You may need to use heavy foot pressure. (Figure 3)
With 3/4" tube, allow 6" takeup
With 1" tube, allow 8" takeup
Box Offsets
1. First mark 2 1/2" from end of pipe.
2. Second mark 2" from first mark.
3. Stand bender on the handle upside down, and slide pipe through bender and line up first mark at the arrow mark on the bender.
4. Put foot on the floor bracing the end of the bender with your toes.
5. Brace pipe under your shoulder, now bend the pipe down 10°.
6. Slide the pipe down to the second mark to the arrow and Rotate the pipe 180° upside down, bend pipe back to a 10° angle.
True Offsets
Line up arrow on either side of hook with guideline and make 45° bend in tube.
Reverse tube in bender and adjust so that X is lined up with inch-mark on bender corresponding to depth of offset desired.
Line up guide-line with opposite arrow and make second 45° bend. A true offset, in the same plane, will result between X and Y.
Back-to-Back Bends
Make stub bend at X with guide-line centered on either arrow located on side of hook. Measure distances from X to Y on tube.
Reverse bender and put A on bender at Y on tube. Line up guide-line with opposite arrow than used when making first stub and make second bend.
Saddle Bends
M -- Mid point or center of finished Saddle Bend
X -- Double of the diameter of round object from C
Y -- Double of the diameter of round object from C
Saddle Bend, Step 1
Place tube in bender so that "M" on tube is at notch on bender and make a 45° bend. (A 45° bend is reached when bender handle is at a right angle to the tube.)
Saddle Bend, Step 2
Reverse tube in bender and place B on bender at X on tube. Make return bend of 22 1/2° . Duplicate procedure placing B on bender at Y on tube and complete saddle by making another 22 1/2° bend.
Finished bend neatly saddles around object
Proper alignment of the guide-line with arrows on bender hook will result in the saddle being in a straight line.
To Straighten
Place handle of bender over stub or piece of pipe that will fit inside and push down to the floor in one full sweep.
