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FJR Motorcycle Forums
Technical & Mechanical Problems
Stripped Rear Axle Pinch Bolt
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<blockquote data-quote="user 213" data-source="post: 374262" data-attributes="member: 213"><p>Any particular reason you didn't just install a Helicoil?</p><p></p><p>Aluminum threads are softer than steel bolts, but you knew that. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /> Thus the low torque spec. Installing a steel Helicoil thread insert is a common method of retaining higher torque values, or preventing guttintight procedures from doing damage.</p><p></p><p>For those not familiar with Helicoil inserts, they are slightly larger than the original thread and require tapping with the special Helicoil, (STI), tap, then an insertion tool to install the insert. Once done, the original size bolt may again be used. The finished result is much stronger than the original threads and if need be, may be repaired again with a new insert if you <em>really</em> screw up in the future.</p><p></p><p>While this is a common thread repair method, and kits are sold in may hardware and auto parts stores that come with all needed items, it's also a very common OEM procedure for aluminum assemblies where the parts are expected to be removed multiple times for service during the item's lifetime and/or a higher torque value is desired than plain aluminum threads would support.</p></blockquote><p></p>
[QUOTE="user 213, post: 374262, member: 213"] Any particular reason you didn't just install a Helicoil? Aluminum threads are softer than steel bolts, but you knew that. :D Thus the low torque spec. Installing a steel Helicoil thread insert is a common method of retaining higher torque values, or preventing guttintight procedures from doing damage. For those not familiar with Helicoil inserts, they are slightly larger than the original thread and require tapping with the special Helicoil, (STI), tap, then an insertion tool to install the insert. Once done, the original size bolt may again be used. The finished result is much stronger than the original threads and if need be, may be repaired again with a new insert if you [I]really[/I] screw up in the future. While this is a common thread repair method, and kits are sold in may hardware and auto parts stores that come with all needed items, it's also a very common OEM procedure for aluminum assemblies where the parts are expected to be removed multiple times for service during the item's lifetime and/or a higher torque value is desired than plain aluminum threads would support. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Stripped Rear Axle Pinch Bolt
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