reMorning Everyone:
I am finishing up the rebuild of a small prop pitch motor. We all know the MRC
0017 bearing that is located in the adapter plate is no longer available. My
MRC 0017 races look ok but the bearing assembly is sloppy and the ball bearings
are black and need to be replaced. The largest ball that I measured had a
diameter of 0.1860 inches or 4.72mm. Does anyone know what the spec ball
diameter was? Otherwise, I will have to guess at the size when I order
replacements. I would rather not order loose ball bearings five times to get
this right! I have also heard of people machining solid bronze bearings to
replace this bearing in its entirety.
Also, I understand that there is an improved lip seal to replace the seal under
the adapter plate bearing, Does anyone have a part number? (I replaced the
seal in the gear box housing and reversed its direction also.)
Any further advice on sealing up the gear box before I put the gear train back
in the housing? I have the gears assembled with the “00” out and everything
assembled correctly. The 1971 QST article was very helpful here. I used
Arctic Cat low temperature lithium grease and greased everything in sight! The
unit works.
Any advice on a can to put over the top of the prop pitch motor?
I have the splined gear and need to make a mast attachment. Any photos of
recommendations would be appreciated.
I have found K7NVs site. Very useful info.
I now need to rebuild the electric motor. How does one remove the brake from
the prop pitch electric motor? The end with the break appears to be threaded.
Is a special tool reguired and hose does one get around this.
Many thanks!
Alton, NU8L
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