Hanging Rod / Spool Holder for Steel Shelving (Muscle Rack / Edsal)

thingiverse

These are holders for a hanging rod to attach to a steel shelving unit, specifically designed for use on a Muscle Rack UR4824HPSVL5 or Edsal equivalent. They utilize 3/4in doweling as a rod due to its affordability and wide availability at most hardware stores. A FreeCAD file is included to allow users to adjust the design to fit their specific needs. The unique triangle shape allows for efficient printing, enabling two holders to be printed simultaneously on a MP Mini printer. The picture demonstrates using these holders to store spools, but they can also hold other items such as rolls of butcher paper or paper towels. Their reversible design makes them highly versatile. The rails on shelving units can vary in consistency, resulting in inconsistent fits for these holders. However, a size of 101mm seems to work well on most shelves, despite occasional looseness or tightness. The holders can be mounted either way, providing stability. To ensure a secure fit, about 50% infill ABS is recommended. The upper section's thin design serves two purposes: it allows for easier clipping and releasing when the rail is tight, and minimizes interference with adjacent shelving units. Holes are strategically placed to save filament and accommodate smaller items, while also fitting a 3/4in dowel. This enables users to store objects closer to the rail, reducing stress on the shelf. To customize this object in FreeCAD, focus on three key constraints: * A 101mm distance from the center of the snap fit dowel holder to the edge of the triangular hole ensures compatibility with 100mm diameter spools. * An overall width constraint of 115mm allows for printing on an MP Mini without compromising design flexibility. Users can adjust this dimension to create a smaller version if needed. * The 51.5mm constraint is crucial for adapting the holder to other shelving units, as long as they have a similar profile. The dowel holes are mirrored and slightly oversized at 9.8mm to accommodate potential variations in fit. The snap fit hole is smaller to maintain a snug connection.