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  #1  
Old 04-07-2021, 06:37 AM
rockitdoc's Avatar
rockitdoc rockitdoc is offline
 
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Default AntiRotate Switches

My AntiRotate toggles use a washer with two rectangular tabs. One internal tab fits in a slot in the switch body, the other is external and fits into a slot cut in the panel. The result is a switch that will not rotate when attached to the panel. Desirable to me.

How does one cut the small rectangular hole in the panel for the anti-rotate tab to fit into? Just drilling a hole for the tab to fit into comes to mind, but if there is a reasonable way to make the hole the shape of the tab, that would be preferable. Square drill?
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Last edited by rockitdoc : 04-07-2021 at 06:38 AM. Reason: Clarify
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  #2  
Old 04-07-2021, 07:01 AM
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db1yg db1yg is offline
 
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Default Anti-Rotation

I use a very small square file - mark the 12 o’clock position on the mounting
hole and file upward until fit. I have friends who made a template with a 1/16 drill hole at the correct position-used the mounting hole as a locator.
Cheers
db
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  #3  
Old 04-07-2021, 07:06 AM
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23+ years ago, I just drilled a hole for the anti-rotation tab into the panel. I used ON / OFF plate that were made to be used with the switches and that covers the hole.

Here is a photo of switch and the hole used for a CB beside a switch. After more than 3,000 hours of flight, it does show wear and tear plus corrosion.

Click image for larger version

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Had to delete the photo the first time. I then opened it on my computer and did EDIT on it rotating it around till it was upright then reattach. It can now be viewed upright.
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  #4  
Old 04-07-2021, 07:27 AM
Scott Hersha Scott Hersha is online now
 
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I did the same thing Gary did on all of mine. I made a jig that fits into the hole for the switch with the tab hole in the appropriate place for drilling. I think the hole for the tab was something like a #33 - maybe #30 - whatever the width of the tab is so it fits snugly.
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  #5  
Old 04-07-2021, 07:59 AM
rapid_ascent rapid_ascent is offline
 
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Default

If you put the tabbed washer on the front of the panel most (or half) of the hole will be covered and not as noticeable.

Also another trick is to use the switch and the tabbed washer to mark where to drill the hole. Put the washer on the switch and insert it into the panel from the rear. Then rotate the switch from side to side enough to lightly mark the panel. Then remove the switch and use a square to mark the centerline of the hole with the intersection of the mark. That is where you drill the hole.
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  #6  
Old 04-07-2021, 08:26 AM
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Carl Froehlich Carl Froehlich is online now
 
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Or, mark where the locking ring tab hits the back of the panel. Remove the switch. Use a #40 drill bit to make a small hole at the mark - but do not go all the way through the panel. The small depression easily holds the locking tab in place.

Carl

Last edited by Carl Froehlich : 04-07-2021 at 09:04 AM.
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  #7  
Old 04-07-2021, 08:56 AM
rocketman1988 rocketman1988 is offline
 
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Default Or...

I used an internal lock washer on each side with my Honeywell tl switches...no rotation noted...
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  #8  
Old 04-07-2021, 08:58 AM
alpinelakespilot2000 alpinelakespilot2000 is offline
 
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Easy and nicer aesthetically:
Use a doubler for your switch row behind the panel. Then just drill holes for the anti rotation tab in the doubler and not in the panel itself.
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  #9  
Old 04-07-2021, 09:07 AM
Kyle Boatright Kyle Boatright is online now
 
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Quote:
Originally Posted by alpinelakespilot2000 View Post
Easy and nicer aesthetically:
Use a doubler for your switch row behind the panel. Then just drill holes for the anti rotation tab in the doubler and not in the panel itself.
That’s what I do. Works well.
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  #10  
Old 04-07-2021, 11:37 AM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Quote:
Originally Posted by rocketman1988 View Post
I used an internal lock washer on each side with my Honeywell tl switches...no rotation noted...
I like.

Beautifully simple.

Dave
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