Poor Quality Lug Bolts |
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Poor Quality Lug Bolts |
McMark |
Jan 15 2013, 06:57 PM
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#1
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
This is what cheap lug bolts look like. (IMG:style_emoticons/default/barf.gif)
https://www.youtube.com/watch?v=_Spc-feBV1U |
MartyYeoman |
Feb 7 2014, 06:07 PM
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#2
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Senior Member Group: Members Posts: 1,525 Joined: 19-June 03 From: San Ramon, CA Member No.: 839 Region Association: Northern California |
Chucking the hex end of a wheel bolt and seeing runout at the threaded end is no indication of poor concentricity of the ball seat to the threads. More than likely the part was held from an extended shank on the threaded end while the machining was done and then the excess was cut off afterward. That would ensure concentricity of the working portion of the bolt without having to machine the forged hex. The way to accurately assess the quality of a lug bolt in a lathe is to tap a M14 thread about 20mm deep into a sleeve held in a collet, then bottom a bolt into the sleeve and measure runout with a dial indicator on the ball seat. (IMG:style_emoticons/default/agree.gif) |
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