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  #1  
Old 05-27-2019, 07:52 AM
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Default Repairing broken coils (mouse ears)

Charly-In-Ct-Ri inFebruary posted a brilliant repair for broken mouse ears. A;l credit goes to him. I just tweaked his ideas.

No matter how careful I am kneeling and standing I somehow managed to break a half dozen expensive coils. I tried repairing them with nylon washers and even glueing them on before using them.

They still broke.

So I was enthusiastic in trying his repairs. But they centered around plastic electrical boxes that he cut and reshaped using PVC glue and primer. But I could never find the right size. They were always too large.

Well one day I was wandering through Home Depot and found myself on the PVC aisle and saw some joints and connectors that looked like they might work. So I bought several sizes and headed to my garage.

First I selected a coil and with my Drexel I started carefully slicing away the broken ears. Then I took my sander and smoothed it off. I then selected the right size cap and placed it on the coil and it looked like there was adequate surface area to support it.

Next I measured where to drill the holes and after using 4 different sized drill bits I had the right holes. But after connecting everything I realized there was still too much play. So I began adding nylon washers until I had a good combination for a snug fit.

I wanted to be able to have a little vertical play with the shaft so I took the Drexel and cut a space in the cap at the back. A little use of the sander smoothed up the edges. Then I also sanded the bottom of the connector to rough up the surface so the PVC glues will hold better.

Then I painted it. Mostly to hide my poor craftmanship.

I first used PVC Primer and then PVC glue to attach the 2 pieces. Always add the adhesives on both pieces. I let it sit overnight.

The next morning I tried to break the bond but it seems strong.

Itís a bit of a challenge to hook up the bolt, coil and washers because itís a tight fit but perseverance will make it happen. A foam sealant might help if thereís too much play but this seems to be what I need.

I took my Garrett ATPro with the patched 5x8 coil out yesterday and today. I was cautious at first but before long I forgot I was using a broken coil. No problems and I even found a few things.
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  #2  
Old 05-27-2019, 09:50 AM
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Nice job on the repair. Could you post a picture of the shaft connected to the new PVC piece?

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  #3  
Old 05-27-2019, 01:47 PM
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Default Hooked up and ready for action

Originally Posted by HDMontana View post
Nice job on the repair. Could you post a picture of the shaft connected to the new PVC piece?

Sent from my SM-T580 using Tapatalk

Soitenly.
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  #4  
Old 05-28-2019, 12:23 AM
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Looks good. Thanks for the extra pictures.

HD
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  #5  
Old 05-28-2019, 09:58 AM
Charly-in-CT-RI Charly-in-CT-RI is offline
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Great job. I bet it is stronger then the original ears. My repair was on a Dual Field (water hunting machine) and it is still holding up even with all of the water resistance.

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  #6  
Old 06-04-2019, 02:57 AM
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Nice work, looks pretty sturdy!

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  #7  
Old 11-29-2019, 06:53 PM
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Y
Originally Posted by Chipk View post
Charly-In-Ct-Ri inFebruary posted a brilliant repair for broken mouse ears. A;l credit goes to him. I just tweaked his ideas.

No matter how careful I am kneeling and standing I somehow managed to break a half dozen expensive coils. I tried repairing them with nylon washers and even glueing them on before using them.

They still broke.

So I was enthusiastic in trying his repairs. But they centered around plastic electrical boxes that he cut and reshaped using PVC glue and primer. But I could never find the right size. They were always too large.

Well one day I was wandering through Home Depot and found myself on the PVC aisle and saw some joints and connectors that looked like they might work. So I bought several sizes and headed to my garage.

First I selected a coil and with my Drexel I started carefully slicing away the broken ears. Then I took my sander and smoothed it off. I then selected the right size cap and placed it on the coil and it looked like there was adequate surface area to support it.

Next I measured where to drill the holes and after using 4 different sized drill bits I had the right holes. But after connecting everything I realized there was still too much play. So I began adding nylon washers until I had a good combination for a snug fit.

I wanted to be able to have a little vertical play with the shaft so I took the Drexel and cut a space in the cap at the back. A little use of the sander smoothed up the edges. Then I also sanded the bottom of the connector to rough up the surface so the PVC glues will hold better.

Then I painted it. Mostly to hide my poor craftmanship.

I first used PVC Primer and then PVC glue to attach the 2 pieces. Always add the adhesives on both pieces. I let it sit overnight.

The next morning I tried to break the bond but it seems strong.

Itís a bit of a challenge to hook up the bolt, coil and washers because itís a tight fit but perseverance will make it happen. A foam sealant might help if thereís too much play but this seems to be what I need.

I took my Garrett ATPro with the patched 5x8 coil out yesterday and today. I was cautious at first but before long I forgot I was using a broken coil. No problems and I even found a few things.
Curious to know how your repair is holding up? I just had the left coil ear on my nox 15 in coil break and thinking of trying your method . Thanks Mike

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  #8  
Old 11-29-2019, 07:41 PM
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Originally Posted by yooper69 View post
Y
Curious to know how your repair is holding up? I just had the left coil ear on my nox 15 in coil break and thinking of trying your method . Thanks Mike
I made a post on make it and fix. On the Equinox ear stiffener and repair. This downloadable 3D printer program has a repair kit to fix the issue.

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  #9  
Old 11-30-2019, 09:33 AM
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Originally Posted by Dan B. View post
I made a post on make it and fix. On the Equinox ear stiffener and repair. This downloadable 3D printer program has a repair kit to fix the issue.
Thanks . Now to find someone with 3D printer.

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2020 Silver Coins 40-FTY (1CD)
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  #10  
Old 11-30-2019, 09:39 AM
Charly-in-CT-RI Charly-in-CT-RI is offline
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Originally Posted by yooper69 View post
Y
Curious to know how your repair is holding up? I just had the left coil ear on my nox 15 in coil break and thinking of trying your method . Thanks Mike
My repair is still holding up. I don't use the PI that often but I had it in the water for an hour just the other day. You can see my repair on the this forum.

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  #11  
Old 11-30-2019, 10:23 AM
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Originally Posted by yooper69 View post
Thanks . Now to find someone with 3D printer.
My local library had a 3D printer. They download and save the program. They only charge $1 per ounce for anything printed. It cost me $1.

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  #12  
Old 11-30-2019, 12:16 PM
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Silversmith45 Silversmith45 is offline
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I got the idea on how to repair the ears on my 2500 coil from a thread here on the form. I used PVC parts and glue. It seems to be stronger than it was before.
Name:  Coil 3.jpg
Views: 209
Size:  53.0 KB
Name:  Coil 1.JPG
Views: 208
Size:  75.3 KB
The first picture is before i trimmed it down to fit better.

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  #13  
Old 12-03-2019, 02:44 PM
Charly-in-CT-RI Charly-in-CT-RI is offline
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That was my thread about the repair. The PVC and PVC glue is incredibly super strong.

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  #14  
Old 12-04-2019, 10:18 AM
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If you want to repair delicate or strong plastic I recommend Q bond. It has a powder to sprinkle on the glue and it's incredible! Dries fast! Strong too!
We use it on car plastic parts!

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