I have seen shear pins/bolts for industrial applications that had the diameter reduced or turned down at the shear point to make the shear torque more consistent. I have never seen one like this in an agricultural application. If tthe shear pin holes get worn or distorted from having been shorn many times it will make the pin shear at lower torque than expected, Sometimes the pin holes are in bushings that can be replaced for that reason.
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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