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ARE THESE INDEED FOR OIL FLOW. I HAVE HEARD THAT THIS IS JUST A MARKING FROM THE MANUFACTURING PROCESS. THE STEEL IS WRAPPED AROUND THE ROLLERS ALMOST LIKE RIBBON? SOME SAY THIS STYLE FLEXES AND THE NEW STYLE ie. SMOOTH DOES NOT GIVE AND IS A BAD DESIGN. ANY IDEAS OR VIEWS, EXPERIENCE??? THANK YOU IN ADVANCE.

I am very interested in this discussion. I have three NOS BB-1225 wheel bearings that have the spiral grooves, and yes they float in the cages just enough to keep the rollers parallel with the two races under a heavy flexing load. I believe the spiral grooves are designed to hold grease rather than a result of a manufacturing procedure. While searching for a fourth new bearing, I found one and I purchased it, but it doesn't have the spiral grease grooves, and it doesn't have the same amount of float in the cage. I was wondering myself if this is an inferior design even though it has the same part number. Let's see what other AA mechanics /club members think about this.

there is a company called lang't that sells model T parts. i looked in their hyatt section. they said that the one's that are available don't have the grooves and they would not recommend using them on the outer end of rear axles. this made me wonder?

Top of pagePrevious messageNext messageBottom of page Link to this message By Seth Harbuck, Shreveport, LA on Thursday, May 28, 2009 - 01:21 pm:

Steve,

The Hyatt bearings are indeed springs - not just steel tubes with spiral grooves in them.

That's why they work and the replacements don't - they deal with the misalignment of the rather flexible parts they keep separated.

Seth

this was taken from a ford model t forum. confirms your thoughts. here is the link http://www.mtfca.com/discus/messages/80 ... 1243973228