nuckolls.bob(at)aeroelect
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 Posted: Wed Jun 22, 2011 3:55 pm Post subject: How to hide anti-rotation keyway holes? |
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At 04:18 PM 6/22/2011, you wrote:
| Quote: | Good Afternoon Bruce,
I have no doubt that you are correct and chances are my fears are unfounded, but by using the anti rotation washers, all torque loads are carried by the threaded barrel. If you rely on close proximity of the devices to stop rotation, any torque that is present will be applied to the case. Seems a bit more sanitary to confine that torque to one metal shaft! |
Good put my friend. I HAVE twisted the mounting
barrel off of both breakers and switches by not
transferring those torque loads to the panel as
opposed to the device body.
It probably comes down to planning. If the builder
puts the holes in while the panel is being laid
out on the table, keyway washer holes are a small
part of the total task.
ADDING holes after things are bolted to the airplane
is another matter. THEN is when the builder is looking
for a good excuse not to add them!
I've got access to a mill with digital readouts.
In the past I've considered offering drill templates
for various rows of switches and breakers that
would help get ALL the holes nicely lined up and
dead-on for location.
Bob . . . [quote][b]
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