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  1. ChrisDanger

    3D Force Analysis of a Hydraulic Crawler

    I'm busy with a force analysis of a crawler, pictured below, using Excel. I've colour-coded the main parts into (static) body, yoke, boom and nozzle. I've quickly drawn in the cylinders, but there are 3 pairs: the body/yoke pair swivels the yoke, the yoke/boom pair lifts and lowers the boom, and...
  2. ChrisDanger

    Simple Adjustable Hinge Design

    I'm looking to cheaply manufacture an adjustable hinge, to fix a wheelchair footplate upright to the main frame. Something like the Variloc hinge below looks great, but is expensive to buy, and is complicated to reproduce (with many small internal parts). Does anyone know of some way to...
  3. ChrisDanger

    DIY Shock: Rubber vs Hydraulic Damping + Information Help

    I'm helping a friend design a coilover shock for a wheelchair for his nephew. He suggested using an o-ring or seal friction damper, but after not finding much information to aid in design I wondered if using hydraulics would be viable, but I couldn't find much information on that either. I'm...
  4. ChrisDanger

    Paint Removal (Touch Up Procedure)?

    Hi, I write manuals for equipment we make, things like winches and A-Frames, mostly for offshore mining vessels. I just need to know a method used for removing paint from an area for touching up. Something that's commonly used or doesn't need exotic tools. We generally shot blast to SA 2.5...

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