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  1. mjgarrin

    Torque on Wheel Studs

    Hello, there is probably a simple answer to this, but i have not been able to find it. I am familiar with the idea that the max available torque from a wheel is dependent on the static load radius, load on the wheel, and the friction between the wheel and ground. I am tying to determine the...
  2. mjgarrin

    Effective Center of Double Row Bearings

    Hello, I am working on an analysis of a bearing cage using Timken double row bearings (TDO bearings). When analyzing single row bearings in traditional bearing cages, the effective bearing spread can be determined using the company data sheet. For TDO bearings however, the effective bearing...
  3. mjgarrin

    Clarification of Timing Belt Systems

    Hello, I am fairly new to the concept, but my company is developing a test in which we want a motor to drive a shaft using a timing belt system. I am looking for a basic understanding of how these "synchronous" systems work. Example: I have one pulley with an outer diameter of 9.997 inches...
  4. mjgarrin

    Test Equipment Storage

    Hello, I work in a very small test lab for my company. We do a lot of vehicle field testing, which requires us to have rolls of wire, soldering equipment, and other sensors on hand. The department has grown very quickly in a short time, which has left us with a bit of a mess. We have no...
  5. mjgarrin

    External Terminal Connector Search

    Hello all, I am a test engineer for my company, and use strain gauges and Bridge Completion Modules (BCMs) regularly. Our last project required strain gauging on a vehicle for field testing. We used zip lock bags to protect the BCMs from moisture and what-not, but I am looking for a more secure...
  6. mjgarrin

    Moment of Inertia of Rounded Hollow Rectangle

    Hello, I can't seem to find how to calculate the second moment of inertia (Ixx and Iyy) of a rectangle WITH rounded corners. The below link is great for hollow rectangles, but does anyone know how to calculate it if the corners have radii...
  7. mjgarrin

    Forces and Moments Acting on Vehicle

    Thanks!
  8. mjgarrin

    Forces and Moments Acting on Vehicle

    Hello, I have worked as a test engineer for a few years now. Lately, my company has been shifting focus from testing single components and small systems to full vehicle testing. It has been a very interesting experience, however I am still new to many of the concepts. We had a test recently...
  9. mjgarrin

    Probability of Events in Equations

    Hello, This may be an easy question, but I would like to know how to incorporate the probability of an event in a linear (or non linear) equation. For example, say I have the following linear equation: Y = (100X * W) + 20T + 10M - 50. I collect data from an experiment, and find values X, W, T...
  10. mjgarrin

    Global Test Procedures

    Hello, I have been assigned to create a global test procedure library between two international facilities. Each site has their own test procedures, and I am tasked with combining the two. I am looking for some inspiration on how I want to do this, and am wondering if there are templates out...
  11. mjgarrin

    Threaded Cup Difficult to Remove

    Thanks all, the thread length is roughly 28mm. You make a good point, I should check the thread tolerance and make sure its accurate. Should the tolerance on the internal and external thread be the same? Is there any advantages or disadvantages to say, using a 6g on the external, and a 4H...
  12. mjgarrin

    Threaded Cup Difficult to Remove

    The material is 4140 Q and T. No coatings are used, no lubricants.
  13. mjgarrin

    Threaded Cup Difficult to Remove

    Hello, I have two cups from two different suppliers. The design of the cups call for an external thread M85X1.50 with a 6g tolerance. The hardness value of both cups were checked around 30-36 HRC. There are a few differences in the way the cups were made: Supplier A Cup: Made from a casting...

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