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MaxJax garage lift 1 year follow-up report

Old 09-24-2015, 03:18 PM
dr bob
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Originally Posted by serj_dmr View Post
Dr. Bob,

You bring up valid points in terms of the math and the actual forces at work. As an OEM rep, I am all but required to ensure customer safety and condoning those washers COULD lead to scenarios in which man or machine is damaged/destroyed. I have to play it safe in other words. I will review the pads in house and if there is a reasonable number of pads that are exhibiting this behavior, I will talk to the higher-ups about this issue.

Regarding the possible modifications and low clearance cars: most users make or buy some variety of race ramps to accommodate their car/lift combo in this situation.

I will reply back to the thread once I know more about possible modifications.

Dannmar Tech Team


I fully appreciate the position you are in with regards to product liability. I think that lubrication (WD-40 or silicone spray) on the pin will temporarily take care of the symptom reported, when the rubber pad edge is causing the pin to be a little cocked in the hole in the arm after vertical load is added to the pad.

Meanwhile, since your team is responsible for the design, you have options that include extending the receiver/sleeve that's welded into the end of the arm, so that it protrudes above the top surface of the arm by an amount at least equal to the thickness of the edge of the rubber pad minus the ~0.075" that is already added by the machined weld where the pad and the pin are joined. My previous suggestion was to make a stepped pin, with ~0.5" larger diameter end where it is welded to the pad. Using a stepped pin would make the manufacturing easier, since the machining of the step on the pin would happen on the same screw machine that finishes the OD of the pin now. There would be no post-weld machining needed, vs the machined face you have now that must be done after welding is completed.

We all thank you for your participation here, and appreciate the willingness to get the little details correct.
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Old 09-24-2015, 03:52 PM
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Dr bob,

That is really good feedback and something I can bring up to them and the engineers. Please don't thank me for doing my job. Not paying attention to raw feedback is silly at best and the forums are the best place for feedback. I will post an update once I have reviewed the pads here and discussed the option for a stepped pad pin. Thanks Doc!

Dannmar Tech Team
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