Where To Buy 3/4" Contersink Tomorrow
I'm going to be really pressed for time so grid searching is out of the question. I need a 3/4" model for plastic and aluminum. With a 1/4" or 3/8" shank Has anyone of you actually bought one in...
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Note that the cut out for a 120MM computer fan, for the least possible restriction to airflow, is not a round 120MM diameter hole.
A good mechanical pencil through the fan and around the hub supports should be able to trace the interior of the fan. There will be 4 flats joined by an arc that is not that of a 60MM radius from the center.
I did this recently and once I installed the fans on the 1/4 inch plywood, I came back with the dremel and 1/2 inch sander wheel and bevelled the edge so that any air exiting the fan at a wide angle met Zero additional restriction.
Makes for a quieter, more efficient fan if the fan is mounted to pull, or push air through the shroud.
A good mechanical pencil through the fan and around the hub supports should be able to trace the interior of the fan. There will be 4 flats joined by an arc that is not that of a 60MM radius from the center.
I did this recently and once I installed the fans on the 1/4 inch plywood, I came back with the dremel and 1/2 inch sander wheel and bevelled the edge so that any air exiting the fan at a wide angle met Zero additional restriction.
Makes for a quieter, more efficient fan if the fan is mounted to pull, or push air through the shroud.
