6N motor rubber isolation

This is where record cutters raise questions about cutting, and trade wisdom and experiment results. We love Scully, Neumann, Presto, & Rek-O-Kut lathes and Wilcox-Gay Recordios (among others). We are excited by the various modern pro and semi-pro systems, too, in production and development. We use strange, extinct disc-based dictation machines. And other stuff, too.

Moderators: piaptk, tragwag, Steve E., Aussie0zborn

Post Reply
User avatar
tragwag
Posts: 1260
Joined: Wed Jun 22, 2011 2:30 pm
Location: Providence, RI USA
Contact:

6N motor rubber isolation

Post: # 46742Unread post tragwag
Mon Apr 24, 2017 11:31 am

Does anyone have a part number or near replacement for the rubber motor isolation pieces on the 6N? No hardware stores have anything close to me, and Id rather not waste time buying the wrong thing online.

I know these parts have been discussed thoroughly, but I havent seen a specific mention on a direct replacement.

Thanks!
You do not have the required permissions to view the files attached to this post.
making lathe cuts on a Presto 6N, HIFI stereo cuts on vinylrecorder
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com

User avatar
rsimms3
Posts: 427
Joined: Thu Mar 14, 2013 10:01 am

Re: 6N motor rubber isolation

Post: # 46744Unread post rsimms3
Mon Apr 24, 2017 1:41 pm

Something I ran across a few months ago that look perfect are the rubber rollers from an old printer. I have a few from a printer I decommissioned, I'll post pictures this evening. I ended up going with a large, thick piece of sorbothane on my 6D.

User avatar
sameal
Posts: 309
Joined: Sun May 24, 2015 10:13 pm
Location: Milwaukee, wi
Contact:

Re: 6N motor rubber isolation

Post: # 46760Unread post sameal
Tue Apr 25, 2017 1:37 pm

The printer roller sounds like a really good idea.

I think thats just a rubber piece between two washers on a machine screw basically. I come across a lot of those type isolation mounts on old hammond organ type stuff. I can't find any good replacements either.

User avatar
markrob
Posts: 1623
Joined: Wed Nov 28, 2007 1:14 am
Location: Philadelphia Area

Re: 6N motor rubber isolation

Post: # 46763Unread post markrob
Tue Apr 25, 2017 3:59 pm

Hi,

Maybe these might work:

http://www.esotericsound.com/access.htm

Scroll down to see the improved motor grommets for the Rek-O-Kut turntables.

Also, try typing "motor grommet" into Google and look at the image search results. I see some possible subs there.

Mark

User avatar
rsimms3
Posts: 427
Joined: Thu Mar 14, 2013 10:01 am

Re: 6N motor rubber isolation

Post: # 46766Unread post rsimms3
Tue Apr 25, 2017 9:12 pm

Here's what I have on mine and from the printer. The taller roller has a slightly larger circumference than the smaller one. What I have on my lathe are 1" thick round cut pieces of Sorbothane with a special washer. With the Sorbothane if you don't have sufficient surface contact it won't hold up a screw or bolt, hence the extra large washer. I only have it on the top, I don't have anything between the motor and the underside of the motor mount as you would normally to stiffen the motor and keep it more parallel with the idler pulley.

Image

User avatar
tragwag
Posts: 1260
Joined: Wed Jun 22, 2011 2:30 pm
Location: Providence, RI USA
Contact:

Re: 6N motor rubber isolation

Post: # 46773Unread post tragwag
Wed Apr 26, 2017 5:43 pm

excellent, this is all really helpful.
'grommet' was the word I was looking for!
I kept searching for rubber washer, knowing that it wasn't quite right.
making lathe cuts on a Presto 6N, HIFI stereo cuts on vinylrecorder
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com


User avatar
tragwag
Posts: 1260
Joined: Wed Jun 22, 2011 2:30 pm
Location: Providence, RI USA
Contact:

Re: 6N motor rubber isolation

Post: # 46816Unread post tragwag
Tue May 02, 2017 10:12 am

the new rubber grommets fit well, maybe a little less tall than the originals.
but from what I can tell the rumble is decreased, or at least not worse than before.
I never measured noise floor due to rumble, sorry!

But if you have old, mashed rubber grommets on there, I would highly suggest getting some springy new ones.
making lathe cuts on a Presto 6N, HIFI stereo cuts on vinylrecorder
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com

Post Reply