---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Mon 08/29/16: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:35 AM - Re: Babbitt or insert bearings (tools) ________________________________ Message 1 _____________________________________ Time: 09:35:21 AM PST US Subject: Pietenpol-List: Re: Babbitt or insert bearings From: "tools" Have not had to make this decision, but have done a LOT of research... Insert bearings are superior to pure babbit. Bearings on turbines in nuclear power plants are similar, but WAY WAY bigger and ultimately technological. Furthermore, line boring a block, the process of enlarging the bearing seats for inserts, isn't that hard. Any decent machine shop can do it. Pure babbit is completely acceptable PROVIDING it's done correctly. I can and do pour babbit for woodworking machines. It's a dying art... AND requires a fair amount of specialized equipment and jigs do do a engine block. And then it needs to be line bored anyway. In this case the line boring aligns the bearings and puts them to size as they are not poured exactly to size. As you can see it's the same old same old. Total compromise. The cost of materials to pour is probably twenty bucks. The jigging is rare as hens teeth, although totally low tech. An amateur machinist could make the stuff for no money, just a lot of time at the lathe. Once a block is machined for inserts, it's really a no brainer and inserts aren't really that expensive. The key is finding a GOOD reliable machinist. Should I ever get around to rebuilding my model a, I'll probably try to pour it myself just for the satisfaction. Mistakes are easily repaired, just takes time. No wasted materials really. Tools Read this topic online here: http://forums.matronics.com/viewtopic.php?p=460014#460014 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pietenpol-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pietenpol-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/pietenpol-list Browse Digests http://www.matronics.com/digest/pietenpol-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.