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General Mach Discussion / Re: BT30 spindle from scratch - with power drawbar and ATC of course
« on: July 29, 2012, 09:38:50 AM »
I think the reason the industry uses Bellevilles is the high drawbar forces they need to hit. I was seeing numbers in the 5000 lb range. I also realized early in my design the the more washers you have the less movement each washer needs to make and the less overall pressure applied to the equipment. Also like you said working bellevilles will tend to fatigue them so the more you have the better.
One thought I had before your valve spring idea was to reduce the length of the splined section on my spindle and replace that area with bellevilles. I would have to reduce the diameter to fit in the bore of the step pulley but I think there are some washers in that size range that would work. The math looks good on the valve spring so I'm going to go that direction first and see how it plays out.
A car running that spring probably works it more in one 1/4 mile pass than I would in a year or two of tool changes
One thought I had before your valve spring idea was to reduce the length of the splined section on my spindle and replace that area with bellevilles. I would have to reduce the diameter to fit in the bore of the step pulley but I think there are some washers in that size range that would work. The math looks good on the valve spring so I'm going to go that direction first and see how it plays out.
A car running that spring probably works it more in one 1/4 mile pass than I would in a year or two of tool changes