I would like to ask for some help calculating the deflection of 60" long unsupported rod of 20mm hardened steel. I have used the BeamBoy as well as the formulas from SKF Linear Material documentation, and my results are unrealistic.
I am looking to see the deflection of a 20 lb force hanging from the dead middle of a 60" long piece of 20mm hardened steel clamped at both ends. My computations so far give me deflections way below 0.1mm - which would be great, but it would be too good to be true.
I am a week-end woodworker and am not very handy with metal. I don't know what to expect. Tolerances of 0.5 mm are acceptable for me, maybe even 1mm. I don't want to go to 25mm or 30mm rods unless I have to.
thanks for anyone who would venture to start helping a noob
I really appreciate your help! My situation is far better than that . . . I simplified things a little. I am going to use two rods and will have a router (less than 20 lbs) travel on a fixture with linear bearings.
I am planning to build some drums and was looking for a solution to round the inside of rather long and narrow shells. I make the shells from staves, like a barrel. My plans are to have the shell rounded on the outside first. Then I place it on some bearings (well secured). I place the 2 rods through the shell and ride the router while I slowly turn the shell. With a router angled at 60 degrees, and using a 120 degree V-bit, I can (at least on paper) have a smooth finish on the inside.
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Deflection calculation - 20mm rod
