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  1. sumwonlost

    Pole Bending & Shear

    I am building a structure for my caravan and require assistance with calculation for force. In essence it is a telescopic pole structure holding up an awning. I am using aluminium 6061-T6 with the outer pole being 32mmOD x 2.5mm wall thickness and inner pole 27mm x 2.5 wall thickness. Both...
  2. sumwonlost

    Need Sizes

    As I am in development of my product, I need to make sure it fits all poles internationally, as I do not want to if I can avoid manufacturing different end fittings for each country. As outlined in Australia our poles fit inside the fittings whereas in USA they fit outside the fittings. What...
  3. sumwonlost

    Need Sizes

    Thanks hokie66. I have provided photo how pool fittings/products fit on extension poles in Australia, they all have same fitting. Extension Pole is 32mm OD. I am not sure how products attach to US swimming pool extension poles. Do they fit over the pole as shown if so what is OD of pole...
  4. sumwonlost

    Need Sizes

    Hi, Working on a product I have for swimming pools and finalising. My product attaches to end of swimming pool poles. In Australia, pool pole (32mm OD) fits inside the product fitting. I am not sure how it fits US swimming pool poles. Can somebody assist and give me ID and OD of US swimming...
  5. sumwonlost

    Compression Spring Buckling Design

    I could not find any formulas either on buckling of compression springs and have already contacted a local (smallish) springmaker who advised me that trial and error would be the way to go. Looking at the alternatives suggested, I did look at a extension spring hinged system and discounted it...
  6. sumwonlost

    Compression Spring Buckling Design

    Hi desertfox, Without going into the workings in detail, I am looking at a "dancing light" concept using springs and wires as a stage back drop. The 15kg I required sprung suspended is the approximate weight of suspended pole and light fittings. I have attached a sketch. The light fitting...
  7. sumwonlost

    Compression Spring Buckling Design

    Hi I require some assistance on a product I am working on. I need a design for a compession spring to buckle. The spring is attached to a 32mm OD x 3mm WT aluminium pole on each end. The first pole is 2.4m long and is fixed to ground vertically, the other is 1.5m long and has a 15kg weight...

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