bending with greenlee oneshot cam track

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izak

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this is a terrible place to post this one.... but the forum STILL has not increased the general topic list, so... here it goes....

in the next few days I will be expected to run about 800 feet of 2 1/2 and 4 inch emt. I will be using a greenlee one shot cam track hydraulic bender... I am trying to find a chart to figure out take-up on 90s so that I can bend it right the first time as opposed to ruin one peice of pipe, add a coupling, or bend it long and cut it shorter... unfortunately I dont know the model number, and without that, I cannot get a guide from greenlee...

is anyone very familiar with this unit that can tell me what the numbers for 2 1/2 and 4 inch emt or know the actual model number of that style bender?

thank you for any help you may or may not be able to provide
:)


oh and by the way.... how about adding a "general trade questions" area that we can post this stuff in???
 
Try the "ugly book" they have a chart for the take up on one shot and alot of other info on bending with a one shot.
 
The info is on the bender itself.

The principles of using this machine are no different than hand bending (using multipliers, distance between bends, etc.) The only difference is that the numbers are much larger.

One piece of advice - get yourself an angle gauge and "no-dog" level if you don't have one already. :)
 
cadpoint said:
Try a long 92? on the 2.1/2" and almost ~ 95? on the 4"
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That brings up something interesting. I have noticed that the more "grey" a piece of EMT or RMC is, the less I have to overbend it. The more silver it is, the more it needs overbent. Tearing out old straight pieces from the demo and reusing it in the new work is always a treat, at least for me. I try to only overbend a degree or two, and maybe tweak it again if I really feel the need. It seems harder to judge how much old stuff might need overbent to get the perfect 90. I guess there's no such thing, anyhow. Line up a bunch of factory 90's and see for yourself.
 
izak said:
...I will be using a greenlee one shot cam track hydraulic bender... I am trying to find a chart to figure out take-up on 90s so that I can bend it right the first time as opposed to ruin one peice of pipe, add a coupling, or bend it long and cut it shorter... unfortunately I dont know the model number, and without that, I cannot get a guide from greenlee...
Click to expand...
AFAIK, Greenlee only makes one "Cam Track" bender... the 881. You can download instructions here.
 
  1. Make sure you set it up perfectly level and check it often.
  2. Put a small amount of slip stick or yellow 77 on the face of the shoe.
  3. Print out and read every word of the instructions Smart $ sent you the link for.
  4. Be aware of how the bender reacts to the seam on the pipe.
  5. Notice how different brands of pipe work in the bender
  6. After a few bends you will be an expert.
 
One time I had to use a big bender to bend some 2". Since these were parallel runs, it was obvious that they were not all exact.
However-- this was in a parking garage and there were two, concrete-filled, steel posts - painted yellow - protecting each column from idiots.
So I was able to entertwine the odd ball bent pieces between the posts and columns and use leverage and my mighty muscles to tweak them into exact alignment.
Thank you for reading this post.:wink:
~Peter
 
I read the Tables of the Bends, all said, all bends where stated to the degree. Spring back was mentioned in the literature. Maybe I missed it
 
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