Airplane Maintenance Manual
Bristell
B23
Chapter 20
Chapter 20 Page 8
Issue: 30-Sep-2020
Fig. 4
Drilling of Rivets (solid rivet shown)
Riveting
▶
Fit the parts being connected and drill them together.
Hole diameter must be of 0.1 mm (0.004 in) bigger than
rivet shank.
NOTICE
When drilling, fix by clamps or clecos mutual position of assembled
parts. Holes of higher diameters predrill with a drill bit of smaller
diameter and then redrill them to the final size.
▶
Disassemble the parts and deburr the holes.
NOTICE
For sunk rivets perform conical countersinking of the rivet head by 5°
smaller apex angle (e.g. the head with angle of 100° will have
countersinking of 95°±1°). After countersinking, the cylindrical part of
hole with min. length of 0.3 mm (0.012 in) must remain in material.
Countersinking must be performed in such a way that the rivets head
overruns the area before riveting max. by 0.2 mm (0.008 in), the rivet
head must not be under the surface level (sunk).
▶
Before applying the bonding sealant carefully clean the
connected parts of impurities and degrease contact
surfaces by appropriate agent, e.g. industrial spirit.
NOTICE
For cleaning and degreasing use a clean paper towel or cloth. After
wiping, the towel or cloth must not show any contamination. For
perfect degreasing the whole surface, clean always smaller part of
surface, after its perfect clean continue on. Cleaning liquid always