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  #1  
Old 03-10-2020, 04:40 AM
Clouddancer Clouddancer is offline
 
Join Date: Aug 2009
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Posts: 181
Default Brake Flange ? Hole Pattern

I am looking for the dimensions of the standard hole pattern for the Cleveland brake flange on an RV-4. I was not able to find it on the Vans drawings, nor in a Cleveland documentation. Does anybody know the exact dimensions or where to find it?

BrakeFlange by Clouddancer, on Flickr
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  #2  
Old 03-10-2020, 08:02 AM
HFS HFS is offline
 
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Default Dimensions

The Grove catalog shows:

A) 1.370"

B) 1.370"

D) 1.938"

HFS

Updated information: The above information was taken from Van's Dwg. 38 from 1985 for S/N 1136. P/N U-403 "Brake Mt. Flange" shows four (4) equally spaced holes (90* offset) x 1/4" diameter.

Information taken from Van's Dwg. 38 from 1993 for S/N 3392, Revision 7 (1/92) for P/N U-403 "Brake Mt. Flange" shows 4 x 1/4" holes, on a 1 15/16" diameter circle, with the narrow hole pattern at a 29* offset from the Center Line (or 58* degrees from each other). Yielding dimensions of: .938 between narrow holes, and 1.688 between wide holes, on a 1 15/16" diameter circle.

Last edited by HFS : 03-12-2020 at 08:42 AM. Reason: Updated information
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  #3  
Old 03-10-2020, 09:50 AM
Clouddancer Clouddancer is offline
 
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Default

Thanks. But what I see on the Cleveland and Vans flange is more something like a=15/16. I think the Diameter D could be 1 15/16.
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  #4  
Old 03-10-2020, 10:24 PM
Scott Hersha Scott Hersha is offline
 
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1-15/16 is 1.9375...... pretty close to 1.938. Sounds the same to me.
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  #5  
Old 03-11-2020, 05:56 AM
Clouddancer Clouddancer is offline
 
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Yes, I am pretty confident with the Diameter D being 1.938" resp. 1 15/16".
But the Cleveland brake flanges that I have, a is not even to b. And I am a bit surprised I cannot find those dimensions although those seem to be some kind of "standard".
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  #6  
Old 03-11-2020, 10:56 AM
akabud akabud is offline
 
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Default

That is the same as a 1 15/16 bolt circle with 6 evenly spaced holes, 60° apart.
But it's missing two holes.
So A is .96875 (31/32) and B is 1.67792 (1 43/64).

The dimensions from Grove is for four holes 90° apart.
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Last edited by akabud : 03-11-2020 at 07:22 PM.
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  #7  
Old 03-12-2020, 07:58 AM
HFS HFS is offline
 
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Default Brake Flange Dimensions

Check your PM's

HFS
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