Lab Shaker
A look at what is currently available on eBay
 Brand New Vibrator 4" Round Dental Lab Dentist shaker * US $75.00 
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 Lab Line Barnstead Titer Plate Shaker 4625 NICE free SH US $249.99
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 LAB LINE MICROPROCESSOR SHAKER BATH MODEL 3545 US $125.99
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 Lab-Line R4600 Multi-Mixer Shaker US $549.00
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 Lab LIne model 3587 Multi Wrist Shaker 120V US $449.00
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 Usp Labs 3-IN-1 Shaker Cup US $12.95
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 Barnstead/Lab-Line, Titer Plate Shaker, Model 4625 US $450.00
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 ♥ Dogs LABRADOR LABS Santa Hats Salt & Pepper Shakers Set US $14.99
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 G86993 Lab Line 4625 Titer Plate Shaker US $149.99
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 NEW adjustable speed shaker, lab rocker US $295.00
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 Black Lab salt and pepper shakers US $.99
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 G85846 Lab Line Instruments 3520 Orbital Shaker Parts/Repair US $84.99
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 Lab-Line Shaker Bath US $9.99
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 Test Tube Rocker Mixer Shaker Ames Aliquot 465i Lab Blood US $74.99
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 Lab-line super mini vortexer shaker centrifuge tubes mixer US $87.00
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What is a formula for estimating the axial resonance of a metal column?
I am concerned to estimate the axial resonance of a vibration shaker driving a slip plate in a test lab.
Well I dont' think you're going to get that done with a single formula.
I'd first calculate a spring constant for the column in the axial direction. Based on the Stress/strain.
Then I'd use the forced vibration formulas to check the amplitude of the for forced vibration at the frequency or range that the shaker operates.
You will also need to include the mass of the column and whatever it is supporting.
Next I'd use the stress/strain developed above to determine what stress level would be equal to the calculated amplitude of the vibration. Be Careful. I'd say call a structural engineer but most I know aren't very good at harmonics. There is some mechanical engineering software used to design machines that can do the calculations for you. Sorry I don't know what it's called.
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August 17th, 2008 in
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