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### Author Topic: Advice on wheels and motors?  (Read 2351 times)

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#### Joe Hague

• Beginner
• Posts: 1
##### Advice on wheels and motors?
« on: July 17, 2007, 04:17:09 AM »
Hello all.

I'm new to this forum and hope that someone might be able to give me some advice on a project I am currently making.

I am building a stage prop that I need to add a drive system to. It is a suitcase that needs to drive itself off stage (in a straight line)

The area I have in which i have to place the motor/gears and axle is 150mm by 50mm.
The wheels can be max diameter of 50mm
Overall weight of completed unit could be 6kg max

This is a prop that will have a lot of use so it needs to be as strong as possible.

The questions I have are:
What is a safe axle diameter for the weight
Where is a good place to get aluminium with rubber tread wheels 50mm diameter (heavy-duty)
What is the best motor/gear system for the project 6V (compact strong/cost effective)

Any help or advice is much appreciated.

Cheers

Joe Hague

• Supreme Robot
• Posts: 11,632
##### Re: Advice on wheels and motors?
« Reply #1 on: July 17, 2007, 07:48:45 PM »
Quote
What is a safe axle diameter for the weight

.25" aluminum rod

Quote
Where is a good place to get aluminium with rubber tread wheels 50mm diameter (heavy-duty)

http://www.societyofrobots.com/robot_parts_list_wheels.shtml

Quote
What is the best motor/gear system for the project 6V (compact strong/cost effective)

Depends on desired velocity and acceleration, too.
This tutorial should help you calculate it:
http://www.societyofrobots.com/mechanics_dynamics.shtml
(its a bit math heavy, let me know if you have questions)

#### Brandon121233

• Contest Winner
• Supreme Robot
• Posts: 320
• "Genius is %1 inspiration and %99 perspiration"
##### Re: Advice on wheels and motors?
« Reply #2 on: July 17, 2007, 08:21:40 PM »
Whats your price range? How loud can it be? How fast does it need to go?
if you can answer those questions I could help you more but in the mean time I would suggest one of the 28mm Gearbox, RS-385 Motor series http://www.trossenrobotics.com/store/c/3086-BaneBots.aspx by BaneBots. You would not need to worry about an axle or bearings as they are on the gearbox itself. For wheels I would suggest these http://www.trossenrobotics.com/store/p/4280-Light-Foam-Wheel-2-x-0-40-.aspx with these mounting hubs http://www.trossenrobotics.com/store/p/3564-Mounting-Hub-6mm-pair-.aspx

hope that helps
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