Re: More new AndyMark stuff!
 

I have a question about the Toughbox Nano

The picture on your website show that the middle shaft has the bearing held in with 2 screws and the cads show that it uses a hex bearing and a snap ring on the opposite side I am wondering is which is the real way it will be made.

Re: More new AndyMark stuff!
 

Very good question. I need to upload a new CAD file, since the picture is correct and the CAD is wrong.

The problem is this: our 3/8" hex bearings were delivered last Friday, and the hex was made too small. This hex size should have been 0.375-0.3765", but it came in as 0.372". So, we have this large quantity of too-small 3/8" hex bearings.

The work-around for the Toughbox Nano is to use a regular round bore 3/8" bearing without a flange, and then retain the bearing in place with the two screws.

We are still working on getting the correct 0.375" hex bearings in, but we don't know an exact delivery date yet.

Sincerely,
Andy

Re: More new AndyMark stuff!
 

Andy,
Is there a way you can rebroach the hex in the center to get it up to >.375 ? There has been a couple of times where we've made our "hex bearings" (1/2 flanged bearing w/ a pressed in 1/2" OD 3/8" ID bushing) and had to rebroach them after everything was pressed together.

Brando

Re: More new AndyMark stuff!
 

I'm guessing it's hardened after broaching, in which case the answer would most likely be no.

Re: More new AndyMark stuff!
 

No AM black friday deals? :rolleyes: :p

Guess I'll just have to save up some money for a pair of the shifters.

Re: More new AndyMark stuff!
 

Yes, this is correct. We tried to broach these and just trim off the 0.001-2" per side, and the inner race immediately cracked. That steel is hard, and so is the broach.

Andy

Re: More new AndyMark stuff!
 

I was there at 4 AM to get in, but the line stretched all the way across the front of the building and out to the Chrysler Plant on 31.

AM must have had some awesome deals.

Re: More new AndyMark stuff!
 

Yeah thats what I figured, but it was worth a shot I suppose.

Re: More new AndyMark stuff!
 

# The ball bearings page includes new quantity pricing and more bearings
# Roughtop Tread and Wedgetop Tread now can be purchased in 10 foot spools of 1" wide material

Re: More new AndyMark stuff!
 

The 2010 USB Disable/Stop button is now available.

http://www.andymark.biz/am-0515.html

Re: More new AndyMark stuff!
 

This could be quite useful!

Re: More new AndyMark stuff!
 

I'm starting to really like this Toughbox Nano thing. It's very light and really simple to design into a drivetrain, perfect for the Battlebot I'm working on. :D

In competition it would be a nice lighter replacement for Toughboxes for stuff like mecanum drives.

Re: More new AndyMark stuff!
 

I am too -- it allows for a single-speed drive train with four direct-driven wheels. Since the transmission is all one piece with 1/8" walls and two bearings supporting the shaft, I'm inclined to believe that four of these things are able to support the entire weight and impacts of an FRC robot so long as attachment to the frame is given careful consideration.