dsg 17x72 plain bearings

pressbrake1 · Oct 16, 2017

Ive never seen a modern era ie post war dsg in the flesh with plain bearings, and I suppose ive been brainwashed against them.

If the bearings are good can it still go to work like its frictionless bearing brother?
Regards

Tyrone Shoelaces · Oct 16, 2017

pressbrake1 said:
Ive never seen a modern era ie post war dsg in the flesh with plain bearings, and I suppose ive been brainwashed against them.

If the bearings are good can it still go to work like its frictionless bearing brother?
Regards

If I'm correct the plain bearing machines were considered to be the higher class Toolroom standard machines in the old days. The spindle top speed was a bit slower though.

Regards Tyrone.

Limy Sami · Oct 16, 2017

FYI - the bottom of this page (under the pic of the 17T tool room)
http://www.lathes.co.uk/dsg/index.html

PLUS - IIRC there's something in the DS&G handbook about checking the oil is flowing BEFORE engaging the spindle.

pressbrake1 · Oct 16, 2017

Pictures above of said 17x72.I purchased a late 1740 machine last week and its reminded me of the shear class difference of dsg, even inside when i stripped part of it down, none of those dirty little secrets!

pressbrake1 · Oct 16, 2017

Thanks for replies, I suppose is it worth having as it is a dsg or dismissing because of plain bearings

RC99 · Oct 16, 2017

If it had roller bearings and they were stuffed it would be unaffordable to replace them, even if you could buy new ones, which you probably would not be able to.

Limy Sami · Oct 16, 2017

pressbrake1 said:
Thanks for replies, I suppose is it worth having as it is a dsg or dismissing because of plain bearings

the proof of that pudding will be in the eating,.........that said, unless it's knackered I think you will be suitably pleased - if not outright impressed.

johnoder · Oct 16, 2017

As far as putting them to work, here is one of your colonies'

better efforts piling them up in 1915 - with the fairly new High Speed Steel

I guess you realize the ongoing great war was won ONLY with such cutting tools and plain spindle bearings - as far as getting things machined

pressbrake1 said:
Ive never seen a modern era ie post war dsg in the flesh with plain bearings, and I suppose ive been brainwashed against them.

If the bearings are good can it still go to work like its frictionless bearing brother?
Regards

Tyrone Shoelaces · Oct 16, 2017

pressbrake1 said:
Thanks for replies, I suppose is it worth having as it is a dsg or dismissing because of plain bearings

I wouldn't dismiss it until I'd run it. From a fitting point of view they were the best lathes I ever worked on.

As RC said if the bearings had gone on a " Timken " machine you'd need to win the lottery to replace them.

Regards Tyrone.

pressbrake1 · Oct 17, 2017

RC99 said:
If it had roller bearings and they were stuffed it would be unaffordable to replace them, even if you could buy new ones, which you probably would not be able to.

Indeed , ive stated the same thing on here before, either way stuffed bearings is misery no mater what type!

SAG 180 · Oct 17, 2017

I had to get a new bronze spindle bush machined for my Graziano lathe, until then I'd never heard of a Graziano with them. The chunk of continuous cast bronze tube cost $300+ dollars to buy but it's all done now and I'm very happy with the repair. I'd heard some of the big Holbrooks had white metal spindle bushes as they were used to turn optical reflectors where the surface finish was critical.

A high precision spindle bush would tend to take thinner oils than the roller bearing version of the same lathe, my SAG 180 takes ISO 32 weight oil whereas the roller bearing version SAG 180 takes ISO 46 weight oil. This allows less oil shear and cooler running.

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