Wanted, Recommendation from anyone with experience in chrome moly tubing

I am in the process of setting up my shop to turn out a few engine mounts, along with the cabin main frames for my 701 & 750 build. I already have all the necessary welding and cutting equipement that is needed, along with a complete assortement of full length chrome moly tubing from 1/4" up to the 2" in size. What I am desperatly looking for, is information from anyone that has had experience in using any of the thin walled tubing notchers. I have seen almost all the notchers that are currently available from the various resellers, and I am wondering if anyone out there, has had any positive experience in using one, that they would be willing to share with me.

I was fortunate in finding a set of free plans that can be downloded from another builder type website, that describes the complete procedure of building your own, so I don't know which option might be best for me.

Although the site http://www.bikerradiomagazine.com/forum/phpBB3/viewtopic.php?f=14&a... does not actually deal in airplane construction, is seems as though the need to cut and notch chrome moly tubing, is actually the same.

I would like to thank all those of you, who are willing to spend their time, in a responce to my concerns that might help me in any way, with my decision..



the 701 & 750 scratch

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Comment by Doug Johnson on August 2, 2010 at 10:02pm

Robert, I used this method. Made a box and mounted a bench grinder on the side. Drawer slides under a sliding top . hold the tubing on the movable angle slowly moving into the grinding wheel. works very nice. use a vacuum, makes a mess !
Comment by Debra and Patrick Nesbitt on August 2, 2010 at 2:05pm
Sadly to say the 701 in the picture does not look like that anymore. The previous owner crash it on taxi and wrote it off. I bought it minus engine, instruments,floats and purchase new fuslage kit for it. Go ahead and use the paint scheme if you like.
Comment by Chris Aysen on August 2, 2010 at 11:40am
Rigidity is the name of the game. If the notcher and thus the tubing is not held rigid you may want to for go the production of mounts and cabin frames. The cutter material should be carbide. If you use high speed steel (HSS) you'll find yourself changing cutters VERY frequently.
Comment by Robert Pelland on August 2, 2010 at 10:59am
Chris, I can use either a hand held, or drill press, which ever is more convenient, or needed for the notcher. Sadely I don't as yet, own a milling machine.


P.S. I have however, purchased almost all the necessary parts to fab my own 5' x 12' CNC table, using a spindle to cut out all my future aluminum airplane parts. See http://www.mechmate.com/ for details
Comment by Robert Pelland on August 2, 2010 at 10:53am
Thank's Pat,

As for the video, I too have seen and studied it, however here in lyes my problem. I presently have a CH-750/0200 engine mount, along with the original Zenith cab frame that was loaned to me by a fellow 750 builder. These parts give me all the exact lengths, not to mention the angles that Zenith uses in the manfacturing of their parts. However now that I have these parts, I need to cut and notch the tubing, to the exact same specs as the factory.

That is why I am looking for notcher recommendations, or experience in their use.

Pat, you and Deb have some really nice toy's, and I will be requesting that you become another one of my Canadain friends. :o)

Thank's for your response


In as much as the attached photo is concerned, I was so impressed with the paint scheme of the 701 you purchased a little while back, if you don't object, I am planning on doing the exact same layout as yours, but replacing the colors of the lines with Yellow, Orange, and Red

Comment by Chris Aysen on August 2, 2010 at 10:51am
Robert - What type of machine are you going to mount the notcher on? Drill Press? Milling machine? This is somewhat critical.
Comment by Debra and Patrick Nesbitt on August 2, 2010 at 10:30am
Bob, this is out of my league, but I came across a video on how to build a engine mount for aircraft, I believe it was on the EAA website.

Hope this helps


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