Instructables
Picture of Heavy Duty Washer Ring
I am going to show you how to make a ring from a 3/8" washer
 
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Step 1: Find Washer And Tools

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I used a galvanized 3/8 flat washer, but you can use any other washer as long as it is wider than your finger. You will need: a stepper drill bit, a file or a dremel tool and a small hammer.

Step 2: Start Hammering

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Start rotating the washer on its edge. Simultaneously, tap the washer on its edge with a hammer.

Step 3: Keep Hammering

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The edge of the ring should start to bow out from the hammer blows and the diameter of the washer should be getting smaller. Note: I didn't hammer the edge of the washer enough.

Step 4: Widening

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Once the diameter of the washer reaches the right size, you can use the stepper bit to widen the hole in the center of the washer.

Step 5: Inspecting

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Once your done with the stepper bit the washer should start looking like a ring.

Step 6: Widen Some More

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Using a dremel tool, or a file, finish up the inside of the ring.

Step 7: Finished Product

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This is what you should get when you are finished although to be honest, mine is too big.
nate408 (author) 1 year ago
It may have worked better if I could have centered the drill bit better
I never thought about making a ring out of a washer. Very good idea, may have to give it a go!