Re: no thrust bearing

Drill rod is simple stuff , what you need is to go to industrial
catalogs, the machinery handbook, bearing mfg catalogs- get a quick
edjucation on what parts are available and start designing. here are
some links http://www.mscdirect.com http://www.ntnamerica.com
http://www.mcmaster.com
--good luck



--- In CAD_CAM_EDM_DRO@yahoogroups.com, David Paulson <stlspply@s...>
wrote:

> Hi Andrew
>
> I know what drill rod looks like. Carbon drill rod can be obtained

in air,

> oil or water hardening type. It is used mostly for making tools

like center

> punches, chisels etc where a hardened steel is desirable. It

normally sells

> in 3 ft lengths. It is rather cheap to purchase (around $10.00Can.

for 3'

> Length of 1/2") so accuracy down the entire length would probably

be as near

> what just a cold rolled round would be.
>
>
> ----- Original Message -----
> From: "andrewyslee" <andrewlee@s...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Friday, April 18, 2003 1:20 PM
> Subject: [CAD_CAM_EDM_DRO] Re: no thrust bearing
>
>
> > Hi Bob, list,
> >
> > While not impossible, it is not like walking into

Walmart/RadioShack

> > when one wants to purchase things like linear rails, leadscrew,

etc.

> > The plans I am looking at uses drill rods for guide. No one here
> > seems to know what a drill rod looks like.
> >
> > So, just to dip my toes in to find out what it is all about, I may
> > try to make something simple with drawer slides and threaded rods
> > which one can easily pick up at the hardware stores, then perhaps
> > become more ambitious later. (I know there are lots

of "professionals

> > here, but anyone else went down this road in their "formative"

years?)

> >
> > How does one attach a leadscrew/threaded rod to a thrust bearing?
> > Does one just make sure that the diameters are a tight fit, or are
> > there screws to tighten or something?
> >
> > Thanks
> >
> > In CAD_CAM_EDM_DRO@yahoogroups.com, "Robert Campbell" <bob@c...>
> > wrote:
> > > Andrew,
> > >
> > > Look at my web site and look in the section on machined parts.
> > > www.campbelldesigns.com
> > >
> > > Look at the bearing blocks that I use. What I do is to use two
> > radial
> > > bearings with a lip on them and press one in from both sides of

the

> > bearing
> > > block.
> > >
> > > I do this at both ends. On the far end, I preload the bearings
> > with a
> > > threaded end and a nut.
> > >
> > > On the stepper motor end, I use a flexible coupler to connect

the

> > lead screw
> > > to the stepper motor.
> > >
> > > To answer you question, I would always use bearings in some

type of

> > bearing
> > > block. You will also need to use a nut on at least one end of

the

> > screw.
> > >
> > > Bob Campbell
> > > ----- Original Message -----
> > > From: "andrewyslee" <andrewlee@s...>
> > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > Sent: Thursday, April 17, 2003 8:09 PM
> > > Subject: [CAD_CAM_EDM_DRO] no thrust bearing
> > >
> > >
> > > > Hi,
> > > >
> > > > I am looking at some plans which have the leadscrew hanging

free

> > at
> > > > one end and directly connected to the stepper motor shaft end

at

> > the
> > > > other. I had read in previous post about thrust bearing, and
> > vaguely
> > > > remembered someone mentioning that the stepper motor bearing
> > cannot
> > > > take axial load. However, I was also told that if I am not

cutting

> > > > metal, I wouldn't be dealing with very high forces.
> > > >
> > > > Will connecting leadscrew directly to stepper motor shaft

lead to

> > > > much shorter motor life?
> > > >
> > > > Thanks
> > > >
> > > > Andrew
> > > >
> > > >
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> timg@k...
> > Moderator: pentam@c... indigo_red@q... [Moderators]
> > 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/

> >
> >