 Poor Quality Lug Bolts |
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| euro911 |
 Jan 16 2013, 07:21 PM
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#21
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Retired & living the dream. God help me if I wake up!  Group: Members Posts: 8,855 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California 
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QUOTE(ednosnaws @ Jan 16 2013, 01:06 PM)  Wow....I'm looking to either replace the bolts which just don't look good (chrome is pitted) or switch to studs and lugs. This is obviously a concern to me. Any suggestions on where to get quality stuff? Or do I put it up on blocks and have them rechromed? (IMG:style_emoticons/default/confused24.gif) I'm lucky 'cause I run black bolts (just bead blasted and painted them). Find someone selling used OEM ones and either paint or re-chrome them as needed.I'm more concerned with the safety issue, so I'm definitely going to check all of mine to see how straight they are, though (IMG:style_emoticons/default/idea.gif) |
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| r_towle |
Feb 7 2014, 10:09 AM
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#22
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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its interesting because from what I know, these would have been threaded on a lathe to begin life.
So, they must have been straight enough to do that process. From there, not sure how they do the head, first or last....but it may happen during that operation which may require tons of force to form that head.... Rich |
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| Mikey914 |
Feb 7 2014, 12:00 PM
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#23
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The rubber man Group: Members Posts: 12,711 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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QUOTE(ConeDodger @ Jan 16 2013, 09:31 AM) Mark, Looking at this new video, could they have been over-torqued causing a twist just at the head? Only if these were not hardend and not the proper grade. |
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| ChrisFoley |
Feb 7 2014, 02:11 PM
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#24
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I am Tangerine Racing Group: Members Posts: 7,958 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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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. |
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| MartyYeoman |
Feb 7 2014, 06:07 PM
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#25
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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
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QUOTE(Racer Chris @ Feb 7 2014, 12:11 PM) 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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| McMark |
Feb 7 2014, 06:09 PM
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#26
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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 |
If the ball seat was true to the threads you would see 'wobble' in the seat while spinning. Watch the video and see the seat is true to the hex. Plus I'm not sure what company would manufacture a thread and seat to a nice tight tolerance, then indifferently machine the hex. They either do all the machining right, or it's all suspect IMHO.
I don't dispute that holding the threads is far more accurate, but you can't honestly be suggesting that the bolt in the video may be GOOD!? |
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| SirAndy |
Feb 7 2014, 06:23 PM
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#27
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Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(McMark @ Feb 7 2014, 04:09 PM) but you can't honestly be suggesting that the bolt in the video may be GOOD!? (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/blink.gif) |
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