Edison Standard C - 2 & 4 minute gearing: mandrel beaings ?

Share your phonograph repair & restoration techniques here
Post Reply
User avatar
De Soto Frank
Victor V
Posts: 2687
Joined: Wed Dec 01, 2010 1:27 pm
Location: Northeast Pennsylvania

Edison Standard C - 2 & 4 minute gearing: mandrel beaings ?

Post by De Soto Frank »

I have been tinkering with my ICS "Standard", which has 2 & 4 minute gearing, trying to adjust shafts and gears on the upper-works for good alignment, etc.

The big bearing between the pulley and the mandrel appear to be made from steel, with a "bulge" at the center, so there is some axial "wobble", to allow the bushing to be "self-aligning" ( I am presuming ).

The pivot on the small-end, by the gearing, seems to have some lateral run-out; it appears that the bearing is created by the end of the two-tier gear ( which slips over the end of the mandrel-shaft )riding on the nose of the push-in knurled stud that goes through the frame support and also secures the 2/4minute gear casting. Are there any little ball-bearings / springs to take thrust load inside this small-end bearing set-up ?

Are there any good assembly blow-ups on-line ? :monkey:

Thanks !
De Soto Frank

Jerry B.
Victor Monarch Special
Posts: 8716
Joined: Tue Feb 10, 2009 11:25 am
Personal Text: Stop for a visit when in Oregon.
Location: Albany, Oregon

Re: Edison Standard C - 2 & 4 minute gearing: mandrel beaing

Post by Jerry B. »

I may be missing something but... The C Standard was the first Standard that did not have an end gate. I was offered as a two minute player but it suffers from the pot metal bushing that is between the mandrel and the gears at the left end of the mandrel shaft. The pot metal bushing swells with time, introduces resistance, and eventually seizes the mandrel shaft. The best way to repair any bushing problem is to replace the pot metal bushing with a brass one from Ron Sitko. I've heard of others that replace with an actual bearing. The quick fix is to remove the mandrel shaft and resurface the pot metal bushing by wrapping some very fine sandpaper around a round shaft like a phillips screwdriver and gently sanding the inside of the pot metal bushing. Is it possible that someone did this with your C Standard and sanded too much of the bushing away? If that were done, the result would be a sloppy fit and the entire assembly would not be true and stable. There are no little ball bearings in the assembly. I hope this helps. Jerry Blais

Post Reply