|Circuit Board Repair Guide > Plated Hole Repair > 5.1 Plated Hole Repair, No Inner Layer Connection|
Plated Hole Repair, No Inner Layer Connection
Eyelet Selection Criteria
ID - Inside Diameter
The eyelet inside diameter should be a .075 - .500 mm (.003"-.020") greater than the component lead diameter.
LUF - Length Under Flange
The length of the eyelet barrel under the flange should be .630 - .890 mm (.025" - 035") greater than the thickness of the circuit board. This added length allows for proper protrusion when setting the eyelet.
FD - Flange Diameter
The eyelet flange diameter should be small enough to prevent interference with adjacent lands or circuits.
OD - Outside Diameter
The clearance hole drilled through the circuit board should allow the eyelet to be inserted without force but should not exceed .125 mm (.005") greater than the eyelet outside diameter.
Be sure to select an eyelet meeting the proper criteria. An eyelet with an oversize flange may interfere with adjacent circuits. An eyelet that is too short will not protrude through the circuit board for proper setting.
5.1 Plated Hole Repair, No Inner Layer Connection
Printed Board Type: R/F/W | Skill Level: Intermediate | Conformance Level: High | Rev.: E | Rev. Date: Mar 28, 2001
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