Direct C51 wrote:There has been some talk about different lots of CCC-42s being more susceptible to breaking proud, and maybe I got lucky in this regard, but I had zero issues with a mandral breaking proud in either wing. Make sure you use a #32 bit. If you use a #30 then dimple, the hole will be far too big. I also used a 3 inch scotch brite disc in a drill to deburr the skins before dimpling. Deburring with a deburring tool seemed to result in a slightly enlarged hole after dimpling. A tight fit will help with proud mandral breaks. Is this the whole reason you went with solid rivets?
Concorde wrote:I believe you could also dimple the 3/32 hole and then up drill to 1/8 . Would there be an issue with this ?
racaldwell wrote:The numb on the dimple die fits that hole but not the #32 or #31 holes. Do you turn down the numb in order to use the dimple die? Same would apply to the numb on the countersink cutter when doing the spars.
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