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SVTPerformance's Chain of Restaurants
Pics and Videos Buffet
Penetrating Oil Test
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<blockquote data-quote="Junior00" data-source="post: 16185277" data-attributes="member: 30475"><p>Personal experience, Kroil is a fantastic product that has outperformed other brands through the years. My father was a machinist/millwright so I grew up using most all of these. His testing is flawed in multiple ways. Differing axial force he imparted to individual bolts plays a big part, plus using angle iron and only allowing the thin edge of the lug to touch can skew results easily. He said he torqued them all to 100 ft/lbs yet some came off well under 100 is a red flag as the breakaway torque required shouldn't have lessened unless the metal fatigued or his initial numbers were wrong...or the forces he exerted weren't equal as stated earlier.</p><p></p><p>I think it was back in the early 2000's that a machinist digest or some magazine my father got did a lab controlled test with a machine to ensure the initial and post values weren't skewed by the operator. Basically a robotic controlled torque machine and the hardware was held to strict tolerances, I want to say within .0001 of each other. Application time and everything else a test like that would entail were computer controlled to eliminate variables. Initial values were somewhere around 500 ft/lbs without a penetrant and the Kroil got that down to 100 or so besting the rest. I've seen it break things loose where others have failed so I've stuck with it over the years. </p><p></p><p>It's all about application and proper use, but in the end it's damn near impossible to ensure that every nut and bolt experiences the exact same physical changes. This test, while possible a better/best case example for a DIY scenario, is still woefully inadequate compared to a controlled environment in a lab.</p></blockquote><p></p>
[QUOTE="Junior00, post: 16185277, member: 30475"] Personal experience, Kroil is a fantastic product that has outperformed other brands through the years. My father was a machinist/millwright so I grew up using most all of these. His testing is flawed in multiple ways. Differing axial force he imparted to individual bolts plays a big part, plus using angle iron and only allowing the thin edge of the lug to touch can skew results easily. He said he torqued them all to 100 ft/lbs yet some came off well under 100 is a red flag as the breakaway torque required shouldn't have lessened unless the metal fatigued or his initial numbers were wrong...or the forces he exerted weren't equal as stated earlier. I think it was back in the early 2000's that a machinist digest or some magazine my father got did a lab controlled test with a machine to ensure the initial and post values weren't skewed by the operator. Basically a robotic controlled torque machine and the hardware was held to strict tolerances, I want to say within .0001 of each other. Application time and everything else a test like that would entail were computer controlled to eliminate variables. Initial values were somewhere around 500 ft/lbs without a penetrant and the Kroil got that down to 100 or so besting the rest. I've seen it break things loose where others have failed so I've stuck with it over the years. It's all about application and proper use, but in the end it's damn near impossible to ensure that every nut and bolt experiences the exact same physical changes. This test, while possible a better/best case example for a DIY scenario, is still woefully inadequate compared to a controlled environment in a lab. [/QUOTE]
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