Re: [CAD_CAM_EDM_DRO] Re: Ball/acme screw question

Yo Torston;

Is, "roundtooth", the type that looks sort of like a piece of rope?

Bill

On Tue Oct 29 12:19:34 2002, torsten98001, <torsten@...> wrote:

>--- In CAD_CAM_EDM_DRO@y..., "JJ" <jj5412@e...> wrote:
>> (Hoping this is on topic)
>>
>> In my quest for constant upgrades to my CNC mill/router/pcb thing, I
>> have a couple of questions:
>>
>> Why would you choose a multistart screw over a single start screw?
>>
>> Are acme thread screws more efficient that generic threaded rod?
>>
>> ADVthanksANCE,
>> JJ
>>
>> Be Kind, Be Careful, Be Yourself
>
>multistart screws are usedfull in situations where the threadprofile
>will be smaller then the pitch of the screw.
>for example a 1. wide nut with a 1. pitch screw would allow only
>1 thread to be engaged this makes for a low loadbearing on the screw.
>multysthreading of this screw would add another thread of loadbearing
>capabilitie for every thread added.
>Add as many threads as there is room for them without overlaping.
>
>the efficency of Different threadprofiles
>depends on there intended use.
>example:
>Acme/ballscrew = in motion application
>sawtooth = one directional loadbearing
>roundtooth = in motion in contaminated environments
>there are many more possibles for me to list but you
>get the idee here.
>different designs favor different operating conditions.

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