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Prop Bolt Belleville Washer Update
Marc J. Zeitlin
Folks: I know that a few of you have had issues sourcing Belleville washers for your propeller bolts from Solon MFG. Although I've never had an issue, and sometimes Fastenal can be a backup, there have certainly been issues with availability and sourcing. Thanks to Sig Siefkes, we've got a second vendor for identical belleville washers, with part numbers that indicate identical materials and properties as the Solon washers. For the 1/2" bolts on O-360's and O-540's, there's also a third vendor. The second vendor is "American Bellevilles" and the third is "Key Bellevilles". I've updated the installation instructions to have all the available belleville washer vendor and part number information and updated the web page: to show this latest version of the instructions. If there are any questions or comments, please let me know. Thanks!
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Marc, Greg and I have the 100 of 7/16 washers in stock, they are $1.50 ea + shipping. If we have any interest, we will be happy to also stock the 3/8. Ross@... 307-277-4642 Have fun in Arilington!
On Mon, Aug 15, 2022 at 1:09 PM Marc J. Zeitlin <marc_zeitlin@...> wrote:
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Thank You! Ross Burk 307-277-4642 cell
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David A Froble
On 8/15/2022 4:08 PM, Marc J. Zeitlin wrote:
Folks:I do believe that I mentioned Key Bellevilles some years ago. It is good that you've now mentioned alternative sources. Being hostage to any single mfg is a real PITA. Marc, do you have any advice for tension on belleville washers in general? I'd like to ues them on other than Lycoming engines. I'm thinking that "just clamp them down" may not be the best choice. For example, if a wood prop wants 10 inch lbs torque, would that also be good if using Belleville washers? -- David Froble Tel: 724-529-0450 Dave Froble Enterprises, Inc. E-Mail: davef@... DFE Ultralights, Inc. 170 Grimplin Road Vanderbilt, PA 15486
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Marc J. Zeitlin
David A Froble wrote: Marc, do you have any advice for tension on belleville washers in general? I'd The instructions for usage are not specific to any particular type of engine or type of propeller, other than being specific to wood core props. I'm thinking that "just clamp them down" may not be the best choice. It's not, and it's not what the instructions say to do. Basically, you use the prop MFG's torque value - nothing changes, except needing a longer bolt and installing the bellevilles in the appropriate configuration on the bolt For example, if a wood prop wants 10 inch lbs torque, would that also be good if using Belleville washers?
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