Re: [CAD_CAM_EDM_DRO] Re: Sherline Z-axis ballscrew feed.

The CNC-Ready versions of all Sherline mills are supplied with a non-locking
saddle nut. I think I have an extra locking saddle nut or two lying around
from a manual Z-axis milling column that I haven't used in 3+ years. Maybe
I will scavenge that.

Thanks,

Dan.

----- Original Message -----
From: "ballendo" <ballendo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, September 15, 2003 11:25 AM
Subject: [CAD_CAM_EDM_DRO] Re: Sherline Z-axis ballscrew feed.


> Dan,
>
> I agree that your idea has merit. I also agree with TimG that this is
> all overkill.
>
> Is this the new style nut with the little lever for locking? Thge one
> that Joe M says to remove or fix in the "off" position?
>
> Because that little lever is key to your solution. I made a little
> piece of brass which held it in a semi-closed position, which
> minimised the backlash...
>
> Hope this helps,
>
> Ballendo
>
> P.S. If you've got the old, non- lockable style z axis nut: The
> sherline thread is 3/8-20, a common thread. Making a decent nut seems
> a whole lot less work, IMO. You may even be able to add your own
> version of a "starwheel", like Sherline uses on the xand y...
>
> Here's how: Start with a brass nut threaded for the leadscrew. Turn
> its OD to fit, and mill or file grooves for the "star" shape. tap a 4-
> 40 or so hole in the flat back of the existing nut. Using a piece of
> springy sheet, or music wire held by a 4-40 screw in this hole, bend
> til it engages the grooves in your star nut, which is screwed into
> position above the existing nut (like the new style locking lever).
> Viola, A/b nut.
>