Re: Gear case lapping question

[raglover]

Thank you for the replies. Sorry for the wrong terminology.

I used a piece of high quality wet/dry paper glued to the glass. I used it wet on glass to do exactly what is being suggested….looking for low spots.

I had a casing that had some noticeable low spots and knicks I was trying to remove. Got it polished down and removed all low spots and knicks, it is very smooth and flat. I too usually just do the 847 and seal, have resealed many. This one is just being more troublesome that usual so I suspect my "new" process is at fault. We sand the bearing casing halves of large turbines before using anaerobic sealer in between but cannot remember roughness spec.

I would say that it is at least as smooth as with lapping compound, but is much smoother than the original machined surfaces. I can go back and try the lapping compound to compare the difference

Pictures I do not have, but try to add them when it is needed. Did not mean to cause frustration over people posting/not posting pictures or the question. Just curious if anyone an idea if it was possible to get too smooth and if some roughness was needed for good adhesion.

As always than you for your help I will try to update if the lapping compound works.

Allen