Today, I started preparing to countersink the #19 screw holes to fit a #8 flush head screw dimple. The K1000-08 nutplates on the backside are already riveted.
The issue is that with the nutplate attached the microstop countersink cannot get to depth because the pilot on the #8 countersink bit cant go deep enough into the hole/ nutplate to allow the proper countersink depth into the top wing skin.
I did a trial run on a test piece of scrap and even with max depth on the cage, the bit barely cut into the test piece.
Is there another type of #8 countersinking bit that has a smaller pilot to allow the cage to drop into the nutplate or is there some other technique to allow the countersink to reach the proper depth? ( see red circled areas denoted on RV14 plan pages 16-03/16-04)
Thanks
Jt
The issue is that with the nutplate attached the microstop countersink cannot get to depth because the pilot on the #8 countersink bit cant go deep enough into the hole/ nutplate to allow the proper countersink depth into the top wing skin.
I did a trial run on a test piece of scrap and even with max depth on the cage, the bit barely cut into the test piece.
Is there another type of #8 countersinking bit that has a smaller pilot to allow the cage to drop into the nutplate or is there some other technique to allow the countersink to reach the proper depth? ( see red circled areas denoted on RV14 plan pages 16-03/16-04)
Thanks
Jt