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- Feb 1, 2015
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Then I go to the lathe. Less than a minute to bore one out to my requirements.Good idea, unfortunately it does not work in metric.
Then I go to the lathe. Less than a minute to bore one out to my requirements.Good idea, unfortunately it does not work in metric.
Good point. The radius under the head of the bolt should help centralize the washer although I feel there could be less clearance as the washers can still be assembled visually off centre.I actually believe the larger clearance you are referring to, may be for the Bolt head to Washer interface vs Nut to Washer interface. Proper bolts are radiused at the head to shaft junction. Those radius are called out by standards. Since it's not a 90 degree corner, clearance will be needed allow the bolt head to properly seat flat against the washer vs hanging up on the radius.
Given it would double the sizes, if there were washers for the bolt head and different washers for the nut end, my guess is they went with the "larger" size for both.
Go for a screw with a captive washer. Close tolerance.Good idea, unfortunately it does not work in metric.
I'm a new member, what does the roast mean?I suspect that washers are made that way because that's the way they were always made. Originally, they were made by a blacksmith pinching the hole over a bolster. He probably gave the punch an extra blow to make sure that it the fit the bolt. Since he didn't like having to check and repunch, he probably gave punch an extra hard final blow. By the time the process became industrialized, a standard was set and that's what we have today.
If there are any questions, ask me about the roast.