So I have a Pic-O-Matic that I¡¯ve used occasionally over the last three years or so. Still has undetectable spindle run-out (less than .0005). ?Each time I use it I put 8 or 9 drops of 20wt Velocite oil in each spindle cup but there is no felt in the cups. Should I have added felt or is this model somehow different from what I¡¯ve been reading here about oiling Timken bearings? ?Thank you, -Dave
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On Jan 30, 2019, at 12:38 PM, Jim Irwin <
jimirwin@...> wrote:
Folks seem to think these bearings should be submerged in oil. Or at least ¡°wet¡±. Such is NOT the case. All that¡¯s needed is a very thin oil film. More than that works against proper operation. What seeps ever so slowly down the oil path with felt in place is what is designed to be there. Plenty, sufficient and proper. Felt retards flow. W/o it there, oil flows thru and very little stays behind to do the work, with nothing there to replenish it.
Jim
On Jan 29, 2019, at 1:33 PM, Jody <
jp4lsu@...> wrote:
I agree, I'm a little concerned about how fast mine come out.? It only came to my attention because the oil cup was using oil so slowly with the felt in there.? So I pulled.out to see what happens.
-Jody
-------- Original message --------From: "jmartin957 <jmartin957@...> via Groups.Io" <jmartin957@...>?Date: 1/29/19 11:51 AM (GMT-06:00)?To:?[email protected]?Subject: Re: [atlas-craftsman IO] Concern with my Spindle?The dust covers are not oil seals, but they are meant to retain oil. As Robert states there is a gap between the dust cover and the spindle, and this is where the oil is supposed to leak out. ?So the oil level ¨C at least for a while - should be high enough to reach the bearing rollers.
Jody says that the oil leaks out at the bottom of one of his dust covers just as fast as he can feed it in. That tells me that his dust cover is not retaining any oil at all, and that his bearing may be running dry.
If the dust cover is not a good enough fit in the head stock bore to retain any oil at all, then it should be replaced or perhaps sealed with a silicone or similar sealant.
On Jan 29, 2019, at 11:51 AM, Jon Elson <
elson@...> wrote:
On 01/28/2019 11:46 PM, cwlathes wrote:
The dust covers on my 10F have little slots in them to clear the key . . . My understanding has been that they are there to protect the bearings and are not oil seals . Carvel
Yes, exactly!? That why they are called "dust covers".? Their purpose is to keep swarf from getting into the bearings.? They may actually trap just a LITTLE bit of oil that would otherwise ooze out, but that's not what they are there for.? Obviously, looking at the way they are made and fit, there's no WAY they could function as a SEAL to retain oil.
Jon
