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Oct 13, 2012, 12:20 AM
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Quote:
Originally Posted by sam51401 View Post
FYI, even though Tam at TamJets makes the smaller upgrade trunnion, he has declined to make the larger size due "to slow sales" as per the response to my request.
Not as much demand to turn his EDM loose on such gear.
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Oct 17, 2012, 11:19 AM
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sam51401's Avatar
here are some pics and rough measurements for a EFlite 60-120 nose gear trunnion that i wish to made from a harder material since the original seems very soft.
Oct 17, 2012, 11:31 AM
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eatond's Avatar
Hi Sam,
looks like you're missing a measurement for how wide the trunion is.

Dan Eaton
Oct 17, 2012, 12:31 PM
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opps!!!
.49" thick


Quote:
Originally Posted by eatond View Post
Hi Sam,
looks like you're missing a measurement for how wide the trunion is.

Dan Eaton
Oct 17, 2012, 02:16 PM
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Gamalier's Avatar
I'm a machinist by trade and making the part in a stronger metal will just bring more problems. Retracts are design by plane weight, if you change the design or parts then the actuator might suffer because of a heavier moving parts, etc.

If you want to make a light part and stronger than aluminum you have to use titanium and be aware is going to be pricey (just the bare metal) and to machine it they will charge you a NUT because of its difficulty to machine it. A 1"x1"x6" retails for around 60-75 dollars.
Oct 17, 2012, 03:33 PM
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not looking for bullet proof but the material EF uses is indeed pretty soft. A higher grade of aluminum would work, like 6061 or 7075, similair to what Robart uses.
Oct 19, 2012, 12:09 AM
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Quote:
Originally Posted by sam51401 View Post
not looking for bullet proof but the material EF uses is indeed pretty soft. A higher grade of aluminum would work, like 6061 or 7075, similair to what Robart uses.
From the 2 options you stated I will say use 7075 given the higher yield strength (56K psi vs 35K psi) the higher the temper number the stronger the aluminum.
Oct 19, 2012, 08:26 PM
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I have D/L a cad program today from Google called Sketchup 8. Really nice and have made a 3D drawing of the trunnion for anyone that may have this program. I cant do DXF since that is in the PRO version only and sales for 495$ i think.


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