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With over 3 inches of adjustment, adjusting the length is as simple as removing one end and rotating the body or shaft to the desired length. Thread strength can be thought of like axle spline strength, the more axle splines there are the stronger the axle is.
We use eighteen threads per inch on our lower control arms, not "acme” threads (typically five threads per inch) that tend to be weak and have very little fine-tune ability. The adjusting shaft rides on a brass bushing and is then sealed to keep out dirt. Each unit is then filled with grease to help keep out all moisture and maintain the threads. Black powder coating and zinc plating are standard.
Techbits