On 2015-09-09, wrote:
On Tuesday, September 8, 2015 at 11:18:04 AM UTC-4, Accelo wrote:
replying to Donald, Accelo wrote:

Which Donald? Probably not me, because I note my name as DoN.,
even though I own a Sanford.

Any chance of getting the replacement bearing identification numbers?
Seems they went from a ball bearing to a taper roller bearing sometime
during the SG's production run.
I have a Standford with the roller bearing. My understanding is this
change happened close to when they changed from a flat belt to a "V" belt.
Rick in WA State


Rick,

I am an unofficial historian for Sanford Manufacturing. I have been
compiling data on all the Sanford SG grinders I can locate. Hopefully
someday I will have a tribute website. If you can post your serial
number I can date your machine and add it to the database, I don't have
many from the west coast.

Hmm ... I presume that you have the manuals? I have one for
my S48 -- I think it was from just before the factory closed. If you
don't have it -- drop me an e-mail and I'll give you a URL for it.

To the best of my knowledge, Sanford SGs only used regular ball
bearings. There were several design changes to the spindle to
accommodate newer style bearings. If your spindle does not have oil
cups, it is the later style. Sanford specified 202 type bearings, 35mm
OD, 15mm ID, but instead of an 11mm width, the spindle allows a 5/8"
bearing. That is a legacy bearing size from when bearings used thick
seals.

Useful information, and sent to the printer. Thanks.

6202/7202 sized bearings can be used with a spacer and are available
in abec 3 at least. There are bearings available in the 5/8" width also,
exact replacements for the extinct bearings. They have offset inner and
outer rings. There are also double row, 15mm x 35mm x 5/8" bearings,
type 3202. McMaster-Carr carries them in abec 3.

Also useful information.

I haven't determined a changeover point for the vee belt drive, but it
probably occurred with the switch from the external vertical leadscrew
SG to the internal model SG-48 in 1961. All that Sanford notes is that
they used various sizes of belts over the years. The flat belts are
available from Sopko.com

I can't get to whatever surface hides my serial number at the
moment. Flat belt, FWIW. I've got to pull off the guards on the
vertical ways and de-rust them -- thanks to a rather acidic smoke attack
from a Vactra No. 2 fire a couple of years ago.

Thanks,
DoN.

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