Excal and stress cracks

[Bigfoot]

I just purchased a used Excal 1000. I noticed some small stress cracks around a couple of the holes were the control unit mounts to the shaft. The person I bought it from did have it mounted on a straight shaft. Is this something that I should be worried about? Thanks

 

[brobox]

How close are the crack to the case? If they are just around the bolt holes, I wouldn't worry about it. The cracks could be caused from over tightening the mounting bolts which would not cause any damage to the case itself.

Chuck in Cape Coral

 

[Bigfoot]

Just around the holes. Not even close to the case. Thanks

 

[pistolpete]

If the straight shaft that it was on used spring pins it's not likely that these cracks are caused by overtightening. They could actually be scratches caused by the sand wearing in between the housing and the shaft...

 

[Tony]

What you can do to stop the cracks from spreading (if they are spreading) is to drill a small hole (1mm) at the point where the cracks stop.
This allows the pressure from the crack to be absorbed by the hole. My Excal did the same thing and the cracks were creeping. The drilled holes (yes there were 2) stopped in their tracks.

This is just an idea that was given to me a friend who works with plastics...other options were expensive if you want the problem professionally treated.

Hope this helps,
Tony.

PS Make sure you use rubber o-rings or grommets between the bolts and casing. Work like mini shock absorbers.

 

[Bigfoot]

Thanks all. I will keep an eye on them. I don't believe I will have a problem. Just wanted some input.
Happy Holidays.