J R Martin Posted October 30, 2023 Report Share Posted October 30, 2023 I notice from the WSM for my TR6 CR Series it shows the bolt between the lower wishbone and the mounting bracket has no washers , just a Nyloc nut.. Is this the best engineering solution or would a plain nut and a locking washer be a better option? Thanks in advance John Quote Link to post Share on other sites
RogerH Posted October 30, 2023 Report Share Posted October 30, 2023 Hi John I see Moss show the same in their WebCat. The Nylok will certainly act as a lock nut. It sits flat on the flat bracket. I don't see a problem myself. Roger Quote Link to post Share on other sites
RobH Posted October 30, 2023 Report Share Posted October 30, 2023 Locking washers don't work. NASA says: "The lockwasher serves as a spring while the bolt is being tightened. However, the washer is normally flat by the time the bolt is fully torqued. At this time it is equivalent to a solid flat washer, and its locking ability is nonexistent. In summary, a Iockwasher of this type is useless for locking." [https://ntrs.nasa.gov/api/citations/19900009424/downloads/19900009424.pdf] Quote Link to post Share on other sites
stu50uk Posted October 30, 2023 Report Share Posted October 30, 2023 (edited) Get some Nord-Lock washers if you don't want anything to slacken. You can get them in stainless steel or Delta Protekt material. I got some off eBay last month. If there is no space for a washer, use some Loktite and activator to hold it together. My Harley is held together with it, as correctly applied as per the Mantenance Manual, and Harleys vibrate quite a bit. Edited October 30, 2023 by stu50uk ? Quote Link to post Share on other sites
RogerH Posted October 30, 2023 Report Share Posted October 30, 2023 30 minutes ago, RobH said: Locking washers don't work. NASA says: "The lockwasher serves as a spring while the bolt is being tightened. However, the washer is normally flat by the time the bolt is fully torqued. At this time it is equivalent to a solid flat washer, and its locking ability is nonexistent. In summary, a Iockwasher of this type is useless for locking." [https://ntrs.nasa.gov/api/citations/19900009424/downloads/19900009424.pdf] A decent spring washer when flattened is not just flattened but is aiding the torque loading due to the tensioned spring. NASA may have rockets - but they have lost a few. Quote Link to post Share on other sites
Nigel Triumph Posted October 30, 2023 Report Share Posted October 30, 2023 From experience over many years with my 1970 Triumph 650 bike, Nylocs work, and so do Loctite type locking compounds, but split washers and star washers are not reliable. Twin locking nuts are also effective where there's space. The Triumph 650 is a parallel twin cylinder design, both pistons rising and falling in unison. It's legendary for vibration at speed! Nigel Quote Link to post Share on other sites
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