CLICK HERE AND JOIN OUR COMMUNITY TODAY, IT'S FREE!
Go Back   Electrician Talk - Professional Electrical Contractors Forum > Electrical Trade Topics > Commercial Electrical Forum

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-19-2013, 07:33 AM   #1
Senior Member
 
Join Date: Oct 2012
Location: NJ
Posts: 210
Rewards Points: 6
Default Hand Bending Rigid

When hand bending pipe, is the take off based on the pipe or the shoe? If I'm bending 1/2 rigid with 3/4 EMT bender, what do I use as my take off?

Appreciate any help with this...

gotshokd666 is online now   Reply With Quote
Join Contractor Talk

Join the #1 Electrician Forum Today - It's Totally Free!

ElectricianTalk.com - Are you a Professional Electrical Contractor? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's the leading place for electricians to meet online. No homeowners asking DIY questions. Just fellow tradesmen who enjoy talking about their business, their trade, and anything else that comes up. No matter what your specialty is you'll find that ElectricianTalk.com is a great community to join. Best of all it's totally free!

Join ElectricianTalk.com - Click Here JOIN FOR FREE


Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ElectricianTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Old 06-19-2013, 07:39 AM   #2
Senior Member
 
Join Date: Dec 2008
Location: Chicago
Posts: 458
Rewards Points: 0
Default

Deduct is based off the shoe

local134gt is online now   Reply With Quote
Old 06-19-2013, 08:48 AM   #3
Senior Member
 
Join Date: Sep 2009
Location: Midwest
Posts: 195
Rewards Points: 0
Default

Based on my experience the only way is to bend a scrap piece and determine the deduct from that.

The deduct for a piece of rigid may be different from thinwall even if bent on the same shoe.
bill39 is offline   Reply With Quote
Old 06-19-2013, 12:39 PM   #4
Senior Member
 
Michigan Master's Avatar
 
Join Date: Feb 2013
Location: Michigan
Posts: 654
Rewards Points: 4
Default

This is from the Ugly's book (a good general reference for many topics).
Attached Images
File Type: jpg Stub.jpg (75.7 KB, 53 views)
Michigan Master is online now   Reply With Quote
Old 06-19-2013, 01:10 PM   #5
Large Member
 
ponyboy's Avatar
 
Join Date: Nov 2012
Location: parts unknown
Posts: 5,825
Rewards Points: 36
Default

Quote:
Originally Posted by bill39
Based on my experience the only way is to bend a scrap piece and determine the deduct from that.

The deduct for a piece of rigid may be different from thinwall even if bent on the same shoe.
This
__________________
Too dumb for New York, too ugly for L.A.
ponyboy is online now   Reply With Quote
Old 06-19-2013, 01:28 PM   #6
Senior Member
 
Join Date: Oct 2012
Location: NJ
Posts: 210
Rewards Points: 6
Default

Quote:
Originally Posted by bill39 View Post
Based on my experience the only way is to bend a scrap piece and determine the deduct from that.

The deduct for a piece of rigid may be different from thinwall even if bent on the same shoe.


Quote:
Originally Posted by ponyboy View Post

This
Yeah, I just learned that for myself the hard way...! Thank anyway!

Quote:
Originally Posted by Michigan Master View Post
This is from the Ugly's book (a good general reference for many topics).
That is for EMT. My question was if the same take off applies to rigid...
gotshokd666 is online now   Reply With Quote
Old 06-19-2013, 07:38 PM   #7
Senior Member
 
Michigan Master's Avatar
 
Join Date: Feb 2013
Location: Michigan
Posts: 654
Rewards Points: 4
Default

Quote:
Originally Posted by gotshokd666 View Post
That is for EMT. My question was if the same take off applies to rigid...
You are using a 3/4" EMT bender; deduct is 6" for a stub.

Often times people who havenít bent much pipe will have a slightly different deduct than whatís specified (especially when bending RMC); much of this variance is often due to failure to maintain proper foot pressure, and you can see it in the radius of the resulting bend.
Michigan Master is online now   Reply With Quote
Old 06-19-2013, 08:12 PM   #8
Electron Flow Consultant
 
sparky970's Avatar
 
Join Date: Mar 2008
Location: Longview, WA
Posts: 3,049
Rewards Points: 0
Default

Quote:
Originally Posted by gotshokd666 View Post
When hand bending pipe, is the take off based on the pipe or the shoe? If I'm bending 1/2 rigid with 3/4 EMT bender, what do I use as my take off?

Appreciate any help with this...
If you want to know the real take-up, bend a scrap piece. If you go with what the bender says, you'll end up bending a test piece anyway.
sparky970 is offline   Reply With Quote
Old 06-19-2013, 08:14 PM   #9
Electron Flow Consultant
 
sparky970's Avatar
 
Join Date: Mar 2008
Location: Longview, WA
Posts: 3,049
Rewards Points: 0
Default

Quote:
Originally Posted by Michigan Master View Post
You are using a 3/4" EMT bender; deduct is 6" for a stub.

Often times people who havenít bent much pipe will have a slightly different deduct than whatís specified (especially when bending RMC); much of this variance is often due to failure to maintain proper foot pressure, and you can see it in the radius of the resulting bend.
How would you explain the variance in an electric bender? Over voltage or undervoltage?
sparky970 is offline   Reply With Quote
Old 06-19-2013, 08:56 PM   #10
Senior Member
 
Michigan Master's Avatar
 
Join Date: Feb 2013
Location: Michigan
Posts: 654
Rewards Points: 4
Default

Quote:
Originally Posted by sparky970 View Post
If you want to know the real take-up, bend a scrap piece. If you go with what the bender says, you'll end up bending a test piece anyway.
Once you've done it a few times you should remember the deduct.

Quote:
Originally Posted by sparky970 View Post
How would you explain the variance in an electric bender? Over voltage or undervoltage?
There may be some variance in conduit spring back if from different manufacturing runs. The amount of wear a shoe has will also be a factor if using different benders.
Michigan Master is online now   Reply With Quote
Old 06-19-2013, 10:57 PM   #11
Senior Member
 
Join Date: Dec 2012
Location: California
Posts: 2,079
Rewards Points: 8
Default

This is why a lot of guys put their name on the benders shared by everyone. Not that they are di**s, but that they took the time to actually learn the nuances of the bender, and don't want to have to do it again.
Switched is online now   Reply With Quote
Old 06-26-2013, 06:03 AM   #12
Senior Member
 
Join Date: Mar 2012
Location: Regina, Sask, Canada
Posts: 703
Rewards Points: 0
Default

This might have changed with the modern improvements in benders, but it's hard to bend an offset in emt with a bender that has been used for bending rigid. Something about the hook at the end of the shoe being twisted makes it difficult to line up the bends.

xlink is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted: rigid bending shoes midwesterner Electrician Swap 1 04-23-2013 12:33 AM
Min. For rigid JmanAllen NEC Code Forum 4 09-29-2011 12:23 PM
Bending 1000 is like bending rebar!!!! N.O.L.A. General Electrical Discussion 37 06-27-2011 10:36 PM
Wanted: Greenlee No. 854 3/4" IMC, Rigid Aluminum Hand Bender Kris Davis Electrician Swap 0 05-15-2011 06:13 PM
Bending Rigid EMT (Canada) Aryan General Electrical Discussion 8 07-29-2008 06:34 AM


All times are GMT -4. The time now is 07:34 PM.


Copyright © 2006-2014 Escalate Media LP. All Rights Reserved
Our Pro Sites Network
ContractorTalk.com | DrywallTalk.com | HVACSite.com | PaintTalk.com | PlumbingZone.com | RoofingTalk.com