Hot Hot Is Too Hot...

Nice job there Harold, I like the way those came out. Bet it runs nice and cool and smooth now huh...
 
Got them. Nice! Thanks! I really NEED this now, see next message:
 
I guess I missed something while cleaning up this lathe and bringing it back into service. I'm fairly certain this shaft was smooth when I cleaned out all the hardened grease. It has been slinging more and more black grease...it goes in red (Mobil 1 synthetic axle grease) and comes out black and of significantly lower viscoscity. They are definitely getting warm...even hot to the touch these days and that was not happening 6 months ago.

Some measurements for ya...with my harbor freight micrometer:

Shaft nominal diameter: 0.750"
Diameter of raised lip: 0.752"
Diameter under bearing: 0.742"

Nothing obvious on the bearing needles except a single line near the bottom of the picture where it is matte, not shiny. The inside of the housing is ROUGH. Ugly rough. Pics:

Shaft_zpsmktuiryj.jpg
Bearing_needles_zps089pz4f3.jpg
Housing_2_zps79n1z5kc.jpg
Housing-1_zpsqtbguoe3.jpg
Bearing_Overview_zpsfzdjzlqs.jpg
 
WH, what material is that? Aluminum? Sealed bearings don't wear the housing, so Al would be much easier and faster to machine on a dying lathe!
 
cdhknives said:
WH, what material is that? Aluminum? Sealed bearings don't wear the housing, so Al would be much easier and faster to machine on a dying lathe!
Click to expand...
Yes they are 6061 that I had on hand. They are probably a built little heavier then needed but they have worked great for 2 years now. Here is info on the bearings I used.

Bearings.JPG

WH
 
I did a quick ACAD sketch at lunch...look reasonable? 2" wide may be a problem with spacing between the 2 groove and 4 groove pulley.

Bearing_Atlas-Model_zpskzs0ntum.jpg
 
cdhknives said:
I did a quick ACAD sketch at lunch...look reasonable? 2" wide may be a problem with spacing between the 2 groove and 4 groove pulley.

Your measurements are reasonably close to mine. I am actually at 2.18 wide and 2.25 diameter, but like I said I thought I was a going a little big. The one thing you have to watch is that the center relief groove
leaves enough clearance for the "C" shaped carrier in the back of the "C" to allow for belt adjusting. I am showing 2.6" between the faces of the two pulleys so plenty of room there. I mostly did it as a cut and try as I had a spare assembly to play with.

WH
Click to expand...
 
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