I have prepped the pairs of fuselage bearing brackets including clecoing together and dressing the edges of each pair to remove the stamping marks etc and so they align.
Cleco’d together without the bearing itself, all the rivet holes align and the edges match.
When I put the bearing in place however, the bearing causes a misalignment. Seems there is some out of tolerance between the rivet hole locations and the milled out recess for the bearing. So much so that with the centreline rivet / screws in place I can’t get a AD3 rivet in the outermost hole at all.
You can see there is so much misalignment on one pair I can’t get a rivet in. I’m not totally sure how to handle this - I could potentially ream the #40 holes out to #30 but I don’t think I would have edge distance and it doesn’t solve the misalignment of the holes which are already #30.
Can I sand some material off the edges of the bearings themselves or do they have to fit snugly in the recesses to prevent spinning etc? I feel like they are clamped on their faces more so than held by their perimeter.
In the photo attached you can see how much misalignment there is. I put some blue marker on the inside surfaces of the parts. You can see with no bearing in place that the bearing recesses are not aligned with each other when the rivet holes are aligned.
Cleco’d together without the bearing itself, all the rivet holes align and the edges match.
When I put the bearing in place however, the bearing causes a misalignment. Seems there is some out of tolerance between the rivet hole locations and the milled out recess for the bearing. So much so that with the centreline rivet / screws in place I can’t get a AD3 rivet in the outermost hole at all.
You can see there is so much misalignment on one pair I can’t get a rivet in. I’m not totally sure how to handle this - I could potentially ream the #40 holes out to #30 but I don’t think I would have edge distance and it doesn’t solve the misalignment of the holes which are already #30.
Can I sand some material off the edges of the bearings themselves or do they have to fit snugly in the recesses to prevent spinning etc? I feel like they are clamped on their faces more so than held by their perimeter.
In the photo attached you can see how much misalignment there is. I put some blue marker on the inside surfaces of the parts. You can see with no bearing in place that the bearing recesses are not aligned with each other when the rivet holes are aligned.