Re: [Emc-users] Spindle Lubrication

2013-09-05 Thread Erik Christiansen
On 04.09.13 15:21, andy pugh wrote: > On 4 September 2013 14:05, Stuart Stevenson wrote: > > > Oil bath bearings in the bottom of a gearbox are bathed in ALL of the wear > > particles of the gear train - not a good situation. > > That's an interesting point. > > I guess it is possible that the

Re: [Emc-users] Spindle Lubrication

2013-09-04 Thread andy pugh
On 4 September 2013 14:05, Stuart Stevenson wrote: > Oil bath bearings in the bottom of a gearbox are bathed in ALL of the wear > particles of the gear train - not a good situation. That's an interesting point. I guess it is possible that the idea is that the gearbox oil washes the bearings

Re: [Emc-users] Spindle Lubrication

2013-09-04 Thread Stuart Stevenson
Gentlemen, My goal would be: A spring loaded lip seal at the bottom of the gearbox - above the spindle bearings. Size the seal or bearing surface for approximately 1/2 the recommended interference fit to minimize heat in the seal. If you are turning the head over then a seal at the top would b

Re: [Emc-users] Spindle Lubrication

2013-09-04 Thread John Thornton
The Hardinge CHNC turret uses those quad rings to seal the turret and the housing. JT On 9/3/2013 11:33 PM, Gregg Eshelman wrote: > On Tue, 9/3/13, andy pugh wrote: > > I don't think there is room inside the bolt circle for any > sort of lip > seal though, and I am rather wary of Gene's i

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Gregg Eshelman
On Tue, 9/3/13, andy pugh wrote: I don't think there is room inside the bolt circle for any sort of lip seal though, and I am rather wary of Gene's idea of an O-ring, I can see it managing to pull out a bight and tie itself in a knot. -- There's o-ring cord, in various profiles. Cut a

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread andy pugh
On 3 September 2013 11:10, Gene Heskett wrote: > I saw that. That old Rivett must have been fun restoring. I haven't really started "restoring" it yet. It is as I bought it apart from making a few small parts that were missing. I wanted to get it working properly to make a decision on the stat

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Gene Heskett
On Tuesday 03 September 2013 06:09:37 andy pugh did opine: > On 3 September 2013 10:45, Gene Heskett wrote: > > The seal would be a > > normal lip type seal sized to fit the spindles OD. > > Ah, OK. That was pretty much the plan already, then. > > > Throwing oil on the wood is not nice at all.

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread andy pugh
On 3 September 2013 10:45, Gene Heskett wrote: > The seal would be a > normal lip type seal sized to fit the spindles OD. Ah, OK. That was pretty much the plan already, then. > Throwing oil on the wood is not nice at all. You can't put a finish on it > as every drop is an 'eye' the finish runs

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Gene Heskett
On Tuesday 03 September 2013 05:50:35 andy pugh did opine: > On 3 September 2013 09:55, andy pugh wrote: > > I don't think there is room inside the bolt circle for any sort of lip > > seal though, and I am rather wary of Gene's idea of an O-ring, I can > > see it managing to pull out a bight and

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Gene Heskett
On Tuesday 03 September 2013 05:14:30 andy pugh did opine: > On 3 September 2013 08:24, Steve Blackmore wrote: > > In practice it worked well - if it's working - leave it alone, the odd > > splash of oil is part of the experience. > > I have tried re-greasing to see if it helps. > The problem is

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Mark Wendt
On Mon, Sep 2, 2013 at 12:56 PM, andy pugh wrote: > The spindle of my milling machine has a plate that specifies Vitrea > oil 72 for the gears but Alvania Grease 3 for the bearings. > > I suspect that the top bearing needs grease because there is no > prospect of it getting enough oil by splash.

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread andy pugh
On 3 September 2013 09:55, andy pugh wrote: > I don't think there is room inside the bolt circle for any sort of lip > seal though, and I am rather wary of Gene's idea of an O-ring, I can > see it managing to pull out a bight and tie itself in a knot. However, I could try one of these: http://si

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread andy pugh
On 3 September 2013 08:24, Steve Blackmore wrote: > In practice it worked well - if it's working - leave it alone, the odd > splash of oil is part of the experience. I have tried re-greasing to see if it helps. The problem is that it is more than the odd splash, it will be nothing at all for age

Re: [Emc-users] Spindle Lubrication

2013-09-03 Thread Steve Blackmore
On Mon, 2 Sep 2013 20:19:57 +0100, you wrote: >On 2 September 2013 18:44, Gene Heskett wrote: > >> Could the oil seal be incorporated into the bearing replacement by giving >> the outer race of the bearing a coat of whatever they use on the outside of >> an oil seal and putting in a bearing with

Re: [Emc-users] Spindle Lubrication

2013-09-02 Thread Marshland Engineering
I've used a special bearing grease designed for spindle.s I have no seals on mine, just a few dust rings at the bottom to keep the dust out. I put new bearings in about 8 years ago and the machine works daily. Never touched it since then. One article said that if berarings were assembled in a p

Re: [Emc-users] Spindle Lubrication

2013-09-02 Thread Gene Heskett
On Monday 02 September 2013 15:47:32 andy pugh did opine: > On 2 September 2013 18:44, Gene Heskett wrote: > > Could the oil seal be incorporated into the bearing replacement by > > giving the outer race of the bearing a coat of whatever they use on > > the outside of an oil seal and putting in a

Re: [Emc-users] Spindle Lubrication

2013-09-02 Thread andy pugh
On 2 September 2013 18:44, Gene Heskett wrote: > Could the oil seal be incorporated into the bearing replacement by giving > the outer race of the bearing a coat of whatever they use on the outside of > an oil seal and putting in a bearing with a decent lip type seal? Not easily, these are quite

Re: [Emc-users] Spindle Lubrication

2013-09-02 Thread Gene Heskett
On Monday 02 September 2013 13:29:27 andy pugh did opine: > The spindle of my milling machine has a plate that specifies Vitrea > oil 72 for the gears but Alvania Grease 3 for the bearings. > > I suspect that the top bearing needs grease because there is no > prospect of it getting enough oil by

[Emc-users] Spindle Lubrication

2013-09-02 Thread andy pugh
The spindle of my milling machine has a plate that specifies Vitrea oil 72 for the gears but Alvania Grease 3 for the bearings. I suspect that the top bearing needs grease because there is no prospect of it getting enough oil by splash. I further suspect that the bottom bearing needs grease becau