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Unread 15-05-2015, 08:26
BrendanB BrendanB is offline
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Re: pic: Manually machinable one-speed gearbox

Quote:
Originally Posted by Dan Petrovic View Post
I don't understand. This thread talks about 2x1x.125 tube being used for Texas Tube. Why would we have to "settle" for 1/8" wall?
If you designed to package your drive in a 2x1 tube you could use the .1" wall tubing from Vexpro to shave a little weight down. 2x2 doesn't come in .1 wall and it wouldn't be wise to press bearings into .0625" wall 2x2 in a drivebase.

Drawing a quick 36" tube in Inventor I had the following weights:

.1" wall 2x1 Versa Tube: 1.97lbs. (0.65lbs. per foot)
.125" wall 2x1 tube: 2.4lbs. (.8lbs. per foot)
.125" wall 2x2 tube: 3.3lbs. (1.1lbs. per foot)

It all depends on what you have planned and are building on top. We had 2x1 Versa tube uprights coming off of our setup so 2x2 tubing worked very well for us. With the extra space it also can make mounting off of the tube a little easier and you can lighten the tube to bring the weight down a little. My personal preference would be a lightened 2x2 tube but that's just me.

Last edited by BrendanB : 15-05-2015 at 08:28.
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