Newsgroups: comp.robotics
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From: nagle@netcom.com (John Nagle)
Subject: Re: Gear dimensioning question
Message-ID: <nagleD40xn3.90E@netcom.com>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <3hpk20$h5@ousrvr.oulu.fi>
Date: Wed, 15 Feb 1995 04:25:50 GMT
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jmh@vttoulu.tko.vtt.fi (Jorg-Michael Hasemann) writes:
>I am in the progress of building somekind of robot arm. 
>A problem involved with it is the dimensioning of the 
>gear for the first joint.
>The maximum torque on this joint is 1500Ncm (1.5Nm). For 
>the last stage of the gear box I have two options:
>a) a module 1 gear combination consisting of 4 gears
>and
>b) a module 0.75 worm gear combination of two gears.
>(which is significant cheaper)
>My question is: Does 0.75 module worm gear withhold
>1500Ncm (1.5Nm) ?

      You can't tell from the information provided.  

      Gear boxes normally come with a maximum output torque
rating from the manufacturer.  This is expressed in pound-inches or 
newton-centimeters.  US manufacturers of such gear boxes include
Berg and Boston Gear.  I don't know who to recommend in Finlnd, though.

					John Nagle
