Re: [CAD_CAM_EDM_DRO] Lead screws for ever...

Hurro,

Ay, that would be one way to do it...

Just reading through some e-mail from Scott (The guy who used my design...)
he's replaced the copper washer with a slightly oversize (machined?) ptfe
washer, and just did everything up tight. He figured that the ptfe would
apply some "sprung" preload to the bearings. The interaction between the
faceplates and the screw nut were annoying him... I would have thought that
the annealed copper would give enough "spring" but apparently not...

Cheers, Chris.

* Design engineer, Assembly worker, Cleaner.
* Ohmark Electronics. PO Box 5302, Christchurch, New Zealand.
* Ph: +64 21 350 603 Fax: +64 3 324 4463 A/H +64 3 324 4462
* http://www.ohmark.co.nz

----- Original Message -----
From: Smoke <Smoke@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Saturday, October 28, 2000 12:22 PM
Subject: Re: [CAD_CAM_EDM_DRO] Lead screws for ever...


> You don't really need to mill a slot for a keyway Chris. Just file a slot
across the shaft. Use a small square file and cut the slot deep enough to
serve the same purpose. A key mounted this way is less likely to fall out
if the screw comes loose too.
>
> Smoke
> -----Original Message-----
> From: Chris Hellyar <chris@...>
> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
> Date: Friday, October 27, 2000 4:59 PM
> Subject: [CAD_CAM_EDM_DRO] Lead screws for ever...
>
>
> Or at least the threads on leadscrews may go on forever...
>
> I thought I might throw my two bits in the hat as well, I've uploaded a
drawing of the mounts I'll be using for router. I sent this drawing along
with full parts drawings to a chap up north and he made up two and said they
work OK. I'm using a standard SKF axial bearing, about $20 each here, so
probably half that in the US.
>