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KDS Helicopters General Discussion KDS Helicopters General Discussion


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Old 01-10-2021, 06:10 PM   #1 (permalink)
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Default Better swashplate ball replacement.

The SKF brand "made in germany" heim ball has a lot of slop between the ball and the housing. It has what looks like a bearing code printed on it and so I wondered if it was a standard part that I could get a better replacement for. Turns out it is and you can.

https://www.ebay.com/itm/GE-12C-sphe...53.m2749.l2649

This one is made by Bearings Limited. It has a PTFE liner inside the housing instead of steel on steel like the stock ball and has basically zero lateral slop and almost no axial slop.

Even after this there was still about 0.1mm of vertical slop which turns out was caused by the space for the heim ball housing between the upper and lower halves of the swashplate being a tiny bit larger than the heim ball assembly. I solved this by applying some Locktite #638 retaining compound to the lower seat and then installing the bearing and allowing it to set so the housing would stay fixed in the lower cylindrical piece that inserts through the bearings which the upper rotating part of the swashplate screws onto.
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