Re: [CAD_CAM_EDM_DRO] Ball/acme screw question

Hi, I am no expert but a few things to think about. Multiple lead acme
screws means you have several threads instead of one so they tend to last
longer and are stronger. Rolled acme thread has been going on for a long
time and the acme rods i bought the other day are nicely finnished and a
quick check says their ok on the length. a "v" thread begins to wear quickly
and once it gets sloppy it weakens as it wears out. an acme thread stays
rugged even as its wearing to a point. As for efficient i cant answer but
there are ground threads of all kinds out there some last for many years
even if they are "v" or acme or even buttress thread. Each has a best use.
Take a look at the size you want and then look at the different grades
available. 1/2-10 acme b2 is the cheapest because of so much use, if you
order a 15/16-16 thread custom made to your spec's then expect to pay
premium big bucks. Sometimes the nut and the retaining method(back to back
bearings or nuts) is the most important part. cul brian f.

----- Original Message -----
From: "JJ" <jj5412@...>
To: <cad_cam_edm_dro@yahoogroups.com>
Sent: Monday, October 28, 2002 4:53 PM
Subject: [CAD_CAM_EDM_DRO] Ball/acme screw question


> (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
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>